JPH095855A - Camera that can record aspect ratio - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a camera which automatically obtains an aspect ratio of a screen when a display screen such as a TV screen is detected in a shooting screen and records the aspect ratio on a film. [Structure] An image sensor 2 for photoelectrically converting a subject image, and an image signal from the image sensor 2 are used to detect whether or not a display screen such as a TV screen is present in the shooting screen.
A shutter suitable for a display screen such as a TV screen is recorded on the film while recording the film format information indicating the aspect ratio in association with the feeding of the film after the end of shooting by detecting the aspect ratio of the display screen such as the V screen. And a control circuit 1 for setting the speed. At the time of printing, the area according to the recorded film format information is printed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a subject image as a recording medium such as a camera for exposing the subject image on a silver salt film capable of recording an aspect ratio or an electronic still camera for electronically recording the subject image on a memory card. Regarding the camera to record.

[0002]

2. Description of the Related Art A camera capable of photographing a TV screen is disclosed in, for example, Japanese Patent Laid-Open No. 6-51395. This camera is equipped with a normal shooting mode switch, a panoramic shooting mode switch, a TV mode switch, and a high-definition TV mode switch. When the photographer switches to a desired mode switch according to the object to be photographed, the aspect ratio corresponding thereto is set. Recording is performed in the magnetic recording area.

However, when shooting a TV screen,
If the mode is selected incorrectly, the aspect ratio of the TV screen does not match the magnetically recorded aspect ratio, and a part of the photographed TV screen is chipped and burned, or unnecessary portions are burned left and right.

An object of the present invention is to determine whether a TV screen or various monitor screens are present in the shooting screen, record the aspect ratio of the display screen, and shoot at a shutter speed suitable for the display screen. It is to provide a camera that can.

[0005]

According to a first aspect of the present invention, an image pickup means for picking up a subject image, and whether or not a display screen such as a TV screen is present in the shooting screen based on an image pickup signal from the image pickup means. A TV screen detecting means for detecting the aspect ratio, an aspect ratio calculating means for calculating an aspect ratio of a display screen such as a TV screen detected by the TV screen detecting means, and an aspect ratio recording means for recording information on the aspect ratio. When the presence of a display screen such as the TV screen is detected by the TV screen detection means, the shutter is turned on to the TV.
By providing a control unit that is driven at a shutter speed suitable for shooting a display screen such as a screen, and that records the information about the aspect ratio calculated by the aspect ratio calculation unit by the aspect ratio recording unit, To achieve. The invention according to claim 2 is provided with a photographing optical system for forming the subject image on a film. According to a third aspect of the present invention, in the camera according to the second aspect, the aspect ratio recording means magnetically records information regarding the aspect ratio in a recording portion provided on the film. Claim 4
According to the invention, an image pickup means for picking up a subject image, an image recording means for recording an image pickup signal from the image pickup means on a recording medium, and whether a display screen such as a TV screen is present in the shooting screen based on the image pickup signal. TV screen detecting means for detecting whether or not, aspect ratio calculating means for calculating an aspect ratio of a display screen such as a TV screen detected by the TV screen detecting means, and aspect ratio recording means for recording information on the aspect ratio And the TV by the TV screen detection means
When the presence of a display screen such as a screen is detected, the shutter is driven at a shutter speed suitable for shooting of the display screen such as the TV screen, and the information about the aspect ratio calculated by the aspect ratio calculating means is described above. The above-mentioned object is achieved by including a control means for recording by the aspect ratio recording means. The invention of claim 5 is claim 1
The camera of No. 4 is provided with shutter speed calculating means for calculating the shutter speed according to the aspect ratio of the display screen such as the TV screen calculated by the aspect ratio calculating means. According to a sixth aspect of the present invention, in the camera according to the first to fourth aspects, a scanning cycle detecting means for detecting a scanning cycle of the display screen such as the TV screen, and the display screen such as the TV screen detected by the scanning cycle detecting means. And a shutter speed calculating means for calculating the shutter speed according to the scanning cycle of. According to a seventh aspect of the invention, in the camera according to the first to fourth aspects, a scanning cycle detecting means for detecting a scanning cycle of the display screen such as the TV screen, and the display screen such as the TV screen calculated by the aspect ratio calculating means. And a shutter speed calculating means for calculating the shutter speed in accordance with the aspect ratio and the scanning cycle of the display screen such as the TV screen detected by the scanning cycle detecting means. According to the invention of claim 8, image pickup means for picking up a subject image, and TV screen detection means for detecting whether or not a display screen such as a TV screen is present in the shooting screen based on an image pickup signal from the image pickup means. And a control means for driving the shutter at a shutter speed suitable for photographing the display screen such as the TV screen when the presence of the display screen such as the TV screen is detected by the TV screen detection means. To achieve.
According to a ninth aspect of the present invention, in the camera of the eighth aspect, the shutter speed is displayed on the TV screen or the like by the control unit when the display screen such as the TV screen included in the photographing screen is at a predetermined ratio or more. The value is controlled to a value suitable for the screen. According to a tenth aspect of the present invention, in the camera of the eighth or ninth aspect, a scanning cycle detecting means for detecting a scanning cycle of a display screen such as the TV screen, and a display screen such as the TV screen detected by the scanning cycle detecting means. And a shutter speed calculating means for calculating the shutter speed according to the scanning cycle of. According to an eleventh aspect of the present invention, an image pickup means for picking up a subject image, and a TV screen detection means for detecting whether or not a display screen such as a TV screen is present in the shooting screen based on an image pickup signal from the image pickup means. , An aspect ratio calculating means for calculating an aspect ratio of a display screen such as a TV screen detected by the TV screen detecting means, an aspect ratio recording means for recording information on the aspect ratio, and the TV by the TV screen detecting means. Aspects for achieving the above-mentioned object by including control means for recording information on the aspect ratio calculated by the aspect ratio calculation means by the aspect ratio recording means when the presence of a display screen such as a screen is detected. Is. According to a twelfth aspect of the present invention, in the camera of the eleventh aspect, the aspect ratio recording means is configured to record the aspect ratio when a display screen such as a TV screen included in the photographing screen has a ratio of a predetermined ratio or more. It is controlled by the control means. According to a thirteenth aspect of the present invention, in the camera according to the twelfth aspect, a photographing optical system for forming the subject image on a film is provided. According to a fourteenth aspect of the present invention, in the camera of the thirteenth aspect, the aspect ratio recording means magnetically records information regarding the aspect ratio in a recording section provided on the film. According to a fifteenth aspect of the present invention, an image pickup means for picking up a subject image, an image recording means for recording an image pickup signal from the image pickup means in a recording medium, and a display screen such as a TV screen in a shooting screen based on the image pickup signal. When the presence of a display screen such as the TV screen is detected by the TV screen detection means and the TV screen detection means for detecting whether or not there is a shutter, the shutter is suitable for photographing the display screen such as the TV screen. The above-mentioned object is achieved by including a control unit that is driven at a shutter speed. According to a sixteenth aspect of the present invention, in the camera of the fifteenth aspect, when the display screen such as a TV screen included in the photographing screen has a ratio higher than a predetermined ratio, the control unit sets the shutter speed to the TV screen or the like. The value is controlled to a value suitable for the display screen. According to a seventeenth aspect of the present invention, in the camera of the fifteenth aspect, a scanning cycle detecting means for detecting a scanning cycle of the display screen such as the TV screen, and a scanning of the display screen such as the TV screen detected by the scanning cycle detecting means. The shutter speed calculating means calculates the shutter speed according to the cycle. According to the invention of claim 18, an image pickup means for picking up a subject image, an image recording means for recording an image pickup signal from the image pickup means on a recording medium, and a display screen such as a TV screen in a shooting screen based on the image pickup signal. Is detected, an aspect ratio calculating means for calculating an aspect ratio of a display screen such as a TV screen detected by the TV screen detecting means, and information about the aspect ratio is recorded. When the presence of a display screen such as the TV screen is detected by the aspect ratio recording means and the TV screen detecting means, the aspect ratio recording means records information about the aspect ratio calculated by the aspect ratio calculating means. By including a control means, the said objective is achieved. According to the invention of claim 19, in the camera of claim 18, a TV included in the photographing screen.
The aspect ratio recording means is controlled by the control means so that the aspect ratio is recorded when a display screen such as a screen has a predetermined ratio or more. The invention of claim 20 is the camera of claim 1, 4, 11, or 18,
The aspect ratio calculated by the aspect ratio calculation means is compared with the reference aspect ratio, and when the calculated aspect ratio matches the reference aspect ratio, the calculated aspect ratio is output, and the calculated aspect ratio is When the aspect ratio differs from the reference aspect ratio, a comparison means for outputting the reference aspect ratio closest to the calculated aspect ratio is provided. The aspect information is information about the reference aspect ratio. The aspect ratio recording method according to claim 21, detecting that a display screen such as a TV screen is present in the screen imaged by the camera, calculating the aspect ratio of the detected display screen, and information regarding the calculated aspect ratio. Is recorded. The shutter speed control method according to claim 22, wherein the TV is displayed on the screen shot by the camera.
It is characterized by detecting that there is a display screen such as a screen, calculating the aspect ratio of the detected display screen such as a TV screen, and controlling the shutter speed according to the aspect ratio. The shutter speed control method according to claim 23 detects that there is a display screen such as a TV screen in the screen captured by the camera, calculates the frequency of the detected display screen such as the TV screen, and sets the frequency to that frequency. The shutter speed is controlled accordingly.

[0006]

According to the first aspect of the present invention, when a display screen such as a TV screen is detected in the shooting screen, the shutter speed is set to a value suitable for shooting the display screen such as the TV screen, and shooting is performed. Also, the aspect ratio of a TV screen or the like is calculated and recorded. In the invention of claim 2, the subject image is exposed on the film. According to the invention of claim 3, the information on the calculated aspect ratio is magnetically recorded on the film. According to the invention of claim 4, when a display screen such as a TV screen is detected in the shooting screen, the shutter speed is set to a value suitable for shooting of the display screen such as the TV screen, and the image of the subject is an electric signal by the image pickup means. And is recorded on a recording medium such as a memory card by the image recording means, and the aspect ratio of a TV screen or the like is calculated and recorded. In the invention of claim 5,
The shutter speed is calculated based on the calculated aspect ratio. According to the invention of claim 6, the scanning cycle of the display screen such as the TV screen is detected, and the shutter speed is calculated based on the scanning cycle. In the invention of claim 7, the shutter speed is calculated based on the calculated aspect ratio and the scanning cycle of the display screen such as the TV screen. In the invention of claim 8,
Based on the image pickup signal from the image pickup means, it is detected whether or not a display screen such as a TV screen is present in the shooting screen. When the presence of a display screen such as a TV screen is detected, the shutter is a display screen such as a TV screen. Is driven at a shutter speed suitable for shooting. According to the invention of claim 9, the shutter speed is controlled to a value suitable for the display screen such as the TV screen when the ratio of the display screen such as the TV screen included in the shooting screen is a predetermined ratio or more. According to the tenth aspect of the present invention, the scanning cycle of the display screen such as the TV screen is detected, and the shutter speed is calculated according to the scanning cycle. According to the invention of claim 11, it is detected based on the image pickup signal from the image pickup means whether or not a display screen such as a TV screen is present in the shooting screen, and if there is a display screen such as a TV screen, the aspect ratio is determined. Calculated and recorded. According to the twelfth aspect of the present invention, information regarding the calculated aspect ratio is recorded when the ratio of the display screen such as the TV screen included in the shooting screen is a predetermined ratio or more. In the thirteenth aspect, the subject image is formed on the film. In the fourteenth aspect of the present invention, the information regarding the aspect ratio is magnetically recorded in the recording portion provided on the film. In the invention of claim 15, the image pickup signal from the image pickup means is recorded in the recording medium. Based on the image pickup signal, it is detected whether or not a display screen such as a TV screen is present in the shooting screen. When the presence of a display screen such as a TV screen is detected, the shutter of the display screen such as the TV screen is detected. It is driven at a shutter speed suitable for shooting. Claim 1
According to the sixth aspect of the invention, when the display screen such as a TV screen included in the shooting screen has a ratio higher than a predetermined ratio, the shutter speed is set to the TV
It is controlled to a value suitable for a display screen such as a screen. Claim 17
In the invention, the scanning cycle of the display screen such as the TV screen is detected, and the shutter speed is calculated according to the scanning cycle.
In the eighteenth aspect of the invention, the image pickup signal from the image pickup means is recorded in the recording medium. Based on the image pickup signal, it is detected whether or not a display screen such as a TV screen is present in the shooting screen, and T
When the presence of a display screen such as a V screen is detected, the aspect ratio is calculated and information regarding the aspect ratio is recorded. In the invention of claim 19, the TV included in the shooting screen
The aspect ratio is recorded when the ratio of the display screen such as the screen is equal to or more than a predetermined ratio. In the invention of claim 20, the calculated aspect ratio is output when the calculated aspect ratio matches the reference aspect ratio, and the calculated aspect ratio is output when the calculated aspect ratio differs from the reference aspect ratio. The reference aspect ratio closest to the ratio is output. According to the twenty-first aspect of the invention, when it is detected that a display screen such as a TV screen is present in the shooting screen, the aspect ratio of the detected display screen is calculated and recorded. Claim 2
In the second aspect, when it is detected that a display screen such as a TV screen is present in the shooting screen, the aspect ratio of the detected display screen is calculated, and the shutter speed is controlled according to the aspect ratio. In the invention of claim 23, when it is detected that there is a display screen such as a TV screen in the shooting screen,
The frequency of the detected display screen is calculated, and the shutter speed is controlled according to the frequency.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera capable of recording an aspect ratio of the present invention will be described below with reference to FIGS. The camera of this embodiment is for exposing a silver halide film having a magnetic recording area by forming a subject image with a photographing optical system.

FIG. 1 is a block diagram showing the arrangement of a camera according to this embodiment. The control circuit 1 is composed of a microcomputer and peripheral circuits, controls the sequence control of the camera and executes various calculations, and executes various controls and calculations according to a control program stored in advance.

An image sensor 2, a frequency detector 3, a shutter 4, a diaphragm 5, an electronic flash device 6 and an information recording circuit 7 are connected to the control circuit 1. The image sensor 2 includes a multi-divided two-dimensional CCD that converts a received light image into an electric signal and transfers the electric signal. Two-dimensional CCD of image sensor 2
The luminance distribution of the object to be photographed is obtained based on the image signal output from.

The frequency detector 3 detects a change in the light intensity received from the object to be photographed per unit time (hereinafter, referred to as an image frequency). As shown in FIG.
The frequency detector 3 includes a light receiving element 31, a bandpass filter 32, and a detection circuit 33. Light receiving element 31
Is composed of a light receiving element such as SPD (silicon photodiode) or CCD, and converts an incident optical image into an electric signal. The band pass filter 32 passes only an electric signal within a narrow band centered on the center frequency set by the control circuit 1. The detection circuit 33 rectifies the electric signal that has passed through the bandpass filter 32 and outputs it to the control circuit 1.

For example, the frequency detecting section 3 can detect the frequency of the TV screen in the shooting screen as follows. When the light receiving element 31 receives the light of the TV image,
The light receiving element 31 generates an electric signal according to the change of the intensity of the light, that is, the frequency of the TV screen. Control circuit 1
Automatically and selectively sets the center frequency of the bandpass filter 32 to the frequency of the TV screen of each color television system. NTSC system: 59.94 sheets / s, PAL
And the SECAM system is 50 images / s, and the high-definition TV system is 60 images / s. When the detection circuit 33 outputs the electric signal that has passed through the bandpass filter 32, the center frequency set in the bandpass filter 32 is determined to be the image frequency of the TV screen in the shooting screen. Here, the image frequency of the TV screen depends on the scanning system of each color television.

Further, in FIG. 1, the shutter 4 gives an exposure amount necessary for photographing to the film, and may be constituted by either a focal plane or a lens shutter. The diaphragm 5 is set to an aperture value according to the exposure value calculated by the control circuit 1. The information recording circuit 7 records the photographing information in the magnetic recording area of the film by the magnetic head 71. In this embodiment, the aspect ratio determined by the control circuit 1 is recorded. In this embodiment, U.S. Pat. No. 4,8643.
A film having a magnetic recording area disclosed in No. 32 or the like can be used, and the magnetic head 81 records film format information indicating the aspect ratio in the magnetic recording area provided on the film.

FIG. 3 shows a process for performing the TV photographing mode in the program executed by the control circuit 1. In step S1, edge detection is performed as follows. First, the image data output from the image sensor 2 is transferred to a memory (not shown) in the control circuit 1. Then, in the image data transferred to the memory, the position where the brightness value changes abruptly, that is, the edge is detected, and the area A of the region surrounded by the edge is obtained. Edge detection is a known technique, and for example, a method based on differentiation or matching is known. Further, if a frequency filter is applied and the light is detected as AC light, edge detection becomes easier.

In step S2, it is determined whether or not the area A of the region obtained in step S1 is equal to or larger than a predetermined reference image area A ₀ (in this embodiment, the reference image area A ₀ is ½ of the photographing screen). Size and). When a positive determination is made in step S2, the TV screen in the shooting screen is recognized as the main subject, and step S3 is executed. In step S3, the aspect ratio of the detected TV screen is obtained. If the determination in step S2 is negative, the area including the TV screen is small and the image is not the main subject, so the TV shooting mode setting process ends.

In step S4, based on the detection result of the frequency detecting section 3, whether the frequency of the TV screen determined to be the main subject in step S2 is equal to any of the image frequencies of the TV screens of the respective television systems described above. To judge. If it is determined to be equal to any of the frequencies, it is determined that the main subject is the TV screen, and step S5 is executed.
If the determination in step S4 is negative, the main subject is a TV
Assuming that the screen is other than the screen, the TV shooting mode setting process ends.

In step S5, the brightness value E of the subject is obtained from the signal from the image sensor 2, and it is determined whether or not the brightness value E is between the lower limit value E1 and the upper limit value E2 of the film latitude, that is, E1. It is determined whether or not <E <E2. When step S5 is positively determined, step S6 is executed. On the other hand, when a negative determination is made in step S5, the shooting screen is extremely dark or is in a bright state that cannot be controlled by the aperture 5. So in this case,
When it is determined that shooting cannot be performed in this state, the TV shooting mode setting process ends. At this time, an error message indicating that the TV screen cannot be photographed may be displayed in the viewfinder or the display device.

Then, in step S6, the shutter speed of the shutter 4 is set to a value suitable for photographing the TV screen.
Shutter speed is 1/3 regardless of color TV system
If it is set to 0 seconds, almost good shooting results can be obtained. However, the aspect ratio obtained in step S3 and step S4
The shutter speed may be determined by using the frequency of the TV screen obtained in step 1. That is, if the aspect ratio is 16: 9, the shutter speed is a multiple of 1/60 seconds because it is a high-definition television. If the aspect ratio is 4: 3 and the frequency of the TV screen is 50 frames / s, the PAL system or the SECAM system is used, and the shutter speed is a multiple of 1/50 seconds. Aspect ratio is 4: 3 and TV screen frequency is 59.94 images / s.
Then, it is the NTSC system, and the shutter speed is 1 / 59.9.
It is a multiple of 4 seconds.

Although the shutter speed may be determined only by the aspect ratio, in this case, when the aspect ratio is 4: 3, the PA is set.
It is not possible to distinguish between the L system, the SECAM system, and the NTSC system.

In step S7, the electronic flash device 6 is turned off. When the electronic flash device 6 is made to emit light, it is reflected on the surface of a television screen or the like, so it is turned off. In the following step S8, based on the brightness value of the TV screen detected in step S5 and the shutter speed set in step S6,
The aperture value of the aperture 5 is set. When setting the aperture value, TV
A more appropriate exposure can be obtained by processing so as to cut the luminance information of the portion other than the screen (the area obtained in step S2).

In step S9, it is determined whether the aspect ratio of the TV screen obtained in step S3 is 16: 9. When step S9 is positively determined, it is determined that the TV screen is a high-definition TV screen, and step S10 is executed. The control circuit 1 stores in the memory that the film format is H size (high-quality size with aspect ratio 16: 9) in the memory together with the corresponding frame number, and ends the TV shooting mode setting process.

If the result of step S9 is negative, step S11 is executed, where the aspect ratio of the TV screen is 4 :.
Judge whether it is 3 or not. If the determination in step S11 is affirmative, it is determined that the TV screen is a standard TV screen,
Step S12 is executed. The control circuit 1 stores in the memory that the film format is L size (standard size with an aspect ratio of 4: 3) together with the corresponding frame number, and ends the TV shooting mode setting process. When a negative determination is made in step S11, the TV shooting mode setting process ends without storing the size information of the film format.

The film format set in step S9 or step S11 is recorded in the magnetic area of the film by the information recording circuit 7 when the film is fed.

In the present embodiment, when the image area of the TV screen is less than the predetermined area A ₀ , shooting in the TV shooting mode is not performed. A TV shooting mode button is provided, and when this button is turned on, the shutter speed is set to a shutter speed suitable for shooting the TV screen (for example, 1/30) regardless of the ratio of the TV screen to the shooting screen.
It is also possible to shoot by setting to (seconds). Also,
When the TV shooting mode button is turned on, the T
The ratio of the TV screen to the shooting screen may be increased by zooming up to the V screen.

Further, in the present embodiment, the TV screen to be photographed is effective regardless of its display system such as direct view type, projection type or liquid crystal type. Further, it is possible to shoot not only on the TV screen but also on a display such as a personal computer. In this case, the control circuit 1 needs to have information about the scanning cycle of the display and the aspect ratio according to the scanning cycle in advance.

If the aspect ratio calculated in step S3 of FIG. 3 is not a predetermined reference value such as 16: 9 or 4: 3, both step S9 and step S11 of FIG. However, as shown in FIG. 4, when both step S9 and step S11 are denied, step S9
In 13, it is determined whether the aspect ratio calculated in step S3 is closer to 16: 9 or 4: 3,
If it is close to 16: 9, the process proceeds to step S10. If it is close to 4: 3, the process proceeds to step S12.

If the processing procedure as shown in FIG. 4 is adopted, even if a monitor of a display screen having an aspect ratio not planned is photographed, an aspect ratio close to the aspect ratio of the monitor is recorded and a photograph is printed. The projected range becomes closer to the aspect ratio of the target TV screen. Further, even when a 16: 9 TV screen is photographed, it may be assumed that the 16: 9 aspect ratio is not correctly calculated due to an error in edge detection. In such a case, the processing of FIG. According to, an aspect ratio of 16: 9 is recorded.

Furthermore, the following modifications are possible. The presence or absence of the TV screen may be detected from the color temperature distribution by measuring the three primary colors with an image sensor to obtain the color temperature distribution. In this case, if not only the film format but also the color temperature information of the TV screen is recorded in the magnetic area of the film, it is possible to automatically insert a filter suitable for the color temperature at the time of printing and obtain a photograph of an appropriate color. The present invention can be applied to a recording medium other than a film, for example, a magnetic recording device or an electronic still camera that records a subject image on a memory card. In this case, the two-dimensional CCD of the image sensor 2 may be shared as an image pickup device for picking up a subject image.

FIG. 5 is a diagram showing an example of the configuration of a camera when the present invention is applied to an electronic still camera, and the control circuit 1A is well known such as a compression circuit for processing an image signal from the image sensor 2. Signal processing circuit is provided, and the processed image signal is recorded in the memory card 8. Detection of a TV screen and the like, calculation of its aspect ratio, calculation of shutter speed, and the like are similar to those of the above-described camera. Further, the film format information indicating the aspect ratio is recorded together with the corresponding frame number in the memory card, and the film format information indicating the aspect ratio is read at the same time when the image is reproduced. Therefore, only the area necessary for printing is output from the memory card to obtain a photograph with a desired aspect ratio. Also, when the image recorded on the memory card is viewed on the monitor, the aspect ratio information is read, and only the image of the necessary area, that is, the image of the desired aspect ratio is displayed on the monitor.

In the configuration of this embodiment, the image sensor 2 serves as an image pickup means, and the control circuit 1 or the frequency detection unit 3 serves as a TV.
The screen detection means, the control circuit 1 serves as the aspect ratio calculating means, the control circuit 1 serves as the shutter speed computing means, and the information recording circuit 7 and the magnetic head 71 serve as the aspect ratio recording means.
The control circuit 1 and the frequency detecting section 3 constitute a scanning cycle detecting means, and the memory card 8 constitutes a recording medium.

[0030]

As described above, according to the present invention,
When a display screen such as a TV screen in the shooting screen is detected, information about the aspect ratio is recorded, or shooting is performed at a shutter speed suitable for shooting the screen display of the TV screen. A display screen such as a screen is photographed with proper exposure, and an area corresponding to an aspect ratio such as a TV screen is printed on photographic paper or displayed on a monitor screen. Furthermore, if the shutter speed is set based on the aspect ratio of the display screen such as a TV screen or the scanning frequency, optimum exposure can be performed regardless of the scanning method of the TV screen that is the shooting target. As in the invention of claim 9, when the display screen such as the TV screen included in the shooting screen is at a predetermined ratio or more, the shutter speed is controlled to a value suitable for the display screen such as the TV screen or the arpect ratio is changed. By recording, the aspect ratio recording and shutter control are performed only when the display screen is the main subject. When the calculated aspect ratio is different from the reference aspect ratio as in the invention of claim 20, the reference aspect ratio closest to the calculated aspect ratio is output. Even if you do not plan in advance, you can print and display as close to the aspect ratio of the display screen as possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a camera according to the present invention.

FIG. 2 is a block diagram showing a configuration example of a frequency detection unit in FIG.

FIG. 3 is a flowchart showing an example of a processing procedure for performing a TV shooting mode.

FIG. 4 is a flowchart showing an example of a processing procedure in a modified embodiment.

FIG. 5 is a block diagram showing a configuration example when the present invention is applied to an electronic still camera.

[Explanation of symbols]

 1, 1A Control circuit 2 Image sensor 3 Frequency detector 4 Shutter 5 Aperture 6 Electronic flash device 7 Information recording circuit 8 Memory card 31 Light receiving element 32 Band pass filter 71 Recording head

Claims (23)

[Claims] 1. An image pickup unit for picking up an image of a subject, and a T image within a photographing screen based on an image pickup signal from the image pickup unit.
A TV screen detecting means for detecting whether or not a display screen such as a V screen exists; an aspect ratio calculating means for calculating an aspect ratio of the display screen such as a TV screen detected by the TV screen detecting means; Aspect ratio recording means for recording information about the ratio, and a shutter speed suitable for photographing the display screen such as the TV screen when the TV screen detecting means detects the presence of the display screen such as the TV screen. A camera capable of recording an aspect ratio, characterized by comprising: a control unit that is driven by the device, and that records the information regarding the aspect ratio calculated by the aspect ratio calculation unit by the aspect ratio recording unit. 2. A camera capable of recording an aspect ratio according to claim 1, further comprising a photographing optical system for forming the subject image on a film. 3. The camera capable of recording an aspect ratio according to claim 2, wherein the aspect ratio recording means magnetically records information relating to the aspect ratio in a recording portion provided on the film. Recordable camera. 4. An image pickup means for picking up an image of a subject, an image recording means for recording an image pickup signal from the image pickup means on a recording medium, and a display screen such as a TV screen in a shooting screen based on the image pickup signal. TV screen detection means for detecting whether or not to perform, an aspect ratio calculation means for calculating an aspect ratio of a display screen such as a TV screen detected by the TV screen detection means, and an aspect ratio for recording information about the aspect ratio. When the presence of the display screen such as the TV screen is detected by the recording unit and the TV screen detection unit, the shutter is driven at a shutter speed suitable for photographing the display screen such as the TV screen, and the aspect ratio is increased. Control means for recording the information about the aspect ratio calculated by the calculating means by the aspect ratio recording means. Capable of recording camera aspect ratio. 5. The camera capable of recording the aspect ratio according to claim 1, wherein the shutter speed is set according to the aspect ratio of the display screen such as the TV screen calculated by the aspect ratio calculating means. A camera capable of recording an aspect ratio, comprising a shutter speed calculation means for calculating. 6. A camera capable of recording an aspect ratio according to claim 1, wherein a scanning cycle detecting means for detecting a scanning cycle of a display screen such as the TV screen, and the scanning cycle detecting means. A camera capable of recording an aspect ratio, comprising: a shutter speed calculation means for calculating the shutter speed according to the detected scanning cycle of a display screen such as the TV screen. 7. A camera capable of recording an aspect ratio according to claim 1, wherein a scanning cycle detecting means for detecting a scanning cycle of a display screen such as the TV screen and the aspect ratio calculating means are provided. A shutter speed calculation means for calculating the shutter speed according to the calculated aspect ratio of the display screen such as the TV screen and the scanning cycle of the display screen such as the TV screen detected by the scanning cycle detection means. A camera that can record the characteristic aspect ratio. 8. An image pickup means for picking up an image of a subject, and a T image within a photographing screen based on an image pickup signal from the image pickup means.
A TV screen detecting means for detecting whether or not a display screen such as a V screen exists, and a shutter when the presence of a display screen such as a TV screen is detected by the TV screen detecting means. And a control unit that is driven at a shutter speed suitable for shooting. 9. The camera according to claim 8, wherein the control means sets the shutter speed to the display screen such as the TV screen when the display screen such as the TV screen included in the photographing screen is at a predetermined ratio or more. A camera that is controlled to a value suitable for. 10. The camera according to claim 8 or 9, wherein a scanning cycle detecting unit that detects a scanning cycle of the display screen such as the TV screen, and a display screen such as the TV screen detected by the scanning cycle detecting unit. A camera, comprising: a shutter speed calculating means for calculating the shutter speed according to a scanning cycle. 11. An image pickup means for picking up an image of a subject, and a T in a photographing screen based on an image pickup signal from the image pickup means.
A TV screen detecting means for detecting whether or not a display screen such as a V screen exists; an aspect ratio calculating means for calculating an aspect ratio of the display screen such as a TV screen detected by the TV screen detecting means; When the presence of a display screen such as the TV screen is detected by the TV screen detection means, the aspect ratio recording means for recording information about the ratio, and the aspect ratio information calculated by the aspect ratio calculation means is displayed as the aspect ratio. A camera capable of recording an aspect ratio, comprising a control means for recording by a ratio recording means. 12. The camera according to claim 11, wherein the control unit records the aspect ratio when a display screen such as a TV screen included in the shooting screen has a ratio of a predetermined ratio or more. A camera capable of recording an aspect ratio, characterized by controlling a recording means. 13. The camera capable of recording an aspect ratio according to claim 12, further comprising a photographing optical system for forming the subject image on a film. 14. A camera capable of recording an aspect ratio according to claim 13, wherein the aspect ratio recording means magnetically records information relating to the aspect ratio in a recording portion provided on the film. Recordable camera. 15. An image pickup unit for picking up a subject image, an image recording unit for recording an image pickup signal from the image pickup unit on a recording medium, and a display screen such as a TV screen in a shooting screen based on the image pickup signal. And a shutter suitable for photographing the display screen such as the TV screen when the presence of the display screen such as the TV screen is detected by the TV screen detecting unit. A camera comprising: a control unit driven at a speed. 16. The camera according to claim 15, wherein the control unit sets the shutter speed to the display screen such as the TV screen when the display screen such as the TV screen included in the photographing screen has a ratio of a predetermined rate or more. A camera that is controlled to a value suitable for. 17. The camera according to claim 15, wherein a scanning cycle detecting unit that detects a scanning cycle of a display screen such as the TV screen, and a scanning cycle of the display screen such as the TV screen detected by the scanning cycle detecting unit. And a shutter speed calculating means for calculating the shutter speed according to the above. 18. An image pickup unit for picking up an image of a subject, an image recording unit for recording an image pickup signal from the image pickup unit on a recording medium, and a display screen such as a TV screen in a shooting screen based on the image pickup signal. TV screen detection means for detecting whether or not to perform, an aspect ratio calculation means for calculating an aspect ratio of a display screen such as a TV screen detected by the TV screen detection means, and an aspect ratio for recording information about the aspect ratio. Recording means, and control means for recording information relating to the aspect ratio calculated by the aspect ratio calculating means by the aspect ratio recording means when the presence of a display screen such as the TV screen is detected by the TV screen detecting means. A camera capable of recording an aspect ratio, comprising: 19. The camera according to claim 18, wherein the control unit records the aspect ratio when a display screen such as a TV screen included in the shooting screen has a ratio of a predetermined ratio or more. A camera which controls a recording means. 20. The camera according to claim 1, wherein the aspect ratio calculated by the aspect ratio calculation means is compared with a reference aspect ratio, and the calculated aspect ratio is calculated. When the calculated aspect ratio is different from the reference aspect ratio, the reference aspect ratio closest to the calculated aspect ratio is output when the calculated aspect ratio differs from the reference aspect ratio. A camera capable of recording an aspect ratio, characterized in that the aspect information is information relating to the reference aspect ratio. 21. Detecting that there is a display screen such as a TV screen in the screen captured by the camera, calculating the aspect ratio of the detected display screen, and recording information regarding the calculated aspect ratio. Characterizing aspect ratio recording method. 22. It is detected that there is a display screen such as a TV screen in the screen taken by the camera, and the detected TV
A shutter speed control method comprising calculating an aspect ratio of a display screen such as a screen and controlling a shutter speed according to the aspect ratio. 23. It is detected that there is a display screen such as a TV screen in the screen taken by the camera, and the detected TV
A shutter speed control method comprising calculating a frequency of a display screen such as a screen and controlling a shutter speed according to the frequency.