JPH03213836A - Self photographing method for camera - Google Patents

Abstract

PURPOSE:To accomplish range-finding appropriate for photographing circumstances by selecting either a single beam mode or a multi-beam mode so that the range-finding is performed and detecting that a photographer gets in a photographed position, thereby performing a specified shutter releasing action. CONSTITUTION:Either the single beam or the multi-beam mode is selected according to the photographing circumstances in an automatic self mode so as to perform the range-finding. Then, 1st range-finding data AFD stored after performing the range-finding by a range-finding part 16 at the time of starting a sequence where self photographing is performed is compared with 2nd range- finding data obtained by repeatedly performing the range-finding in a fixed cycle thereafter. When the change of the range-finding data is detected, a CPU 10 judges that the photographer gets in the photographed position to start the specified shutter releasing action. Thus, a waiting time is shortened, the range- finding before starting a self-operation is made needless, and the range-finding appropriate for the photographing circumstances is accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a self-photographing method using a camera, and more particularly to a self-photographing method using a camera having an automatic focus adjustment function.

[Conventional technology]

Generally, when taking a self-photograph, a self-timer is used to provide a predetermined time difference (for example, 10 seconds) from when the shirt release button is pressed until the shutter actually operates.

Furthermore, there are also cameras recently that allow self-photography using a remote control.

[Problem to be solved by the invention]

However, when using a self-timer, there is a problem in that during the predetermined self-time, you have to get to the position where you stand and create a pose, and if the self-time is too long, the waiting time becomes long. There is. Furthermore, in order to measure the distance to the subject when pressing the shirt release button, ordinary cameras measure the distance by pointing the camera at a subject equidistant from where you are standing, and then change the composition and take a selfie. It was necessary to start a timer, which was complicated.

On the other hand, a camera equipped with a remote control is expensive and has the disadvantage that the camera is also larger.

In addition, recent AP left cameras have a mode in which a single beam is projected onto the subject to measure the distance to the subject (hereinafter referred to as single beam mode). A mode (hereinafter referred to as multi-beam mode) that measures the distance and uses the closest distance as the true subject distance has also been implemented. In addition, in the case of single beam mode, it is advantageous when narrowing down the target, and in the case of multi-beam mode, for example, when photographing two people side by side, the background between the two people will be measured. It has the advantage of not having the disadvantages of single beam mode.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a self-photography method for a camera that can solve these drawbacks and also allow selection of single beam mode and multi-beam mode. do.

[Means to solve problems]

In order to achieve the above object, the present invention provides a single beam mode in which a single beam is projected onto an object to measure the object distance, and a multi-beam mode in which the object distance is measured by projecting a multi-beam beam onto the object. In the self-photography method for a camera, the method includes the step of setting an auto-self mode by operating a predetermined button and selecting one of the single beam mode and the multi-beam mode; When the shirt release switch is turned on during the setting, a step of starting a sequence for taking a self-photograph using the auto selfie mode, and measuring a subject distance using the selected beam mode at the start of the sequence. a first distance measurement step in which the first distance measurement data corresponding to the subject distance is stored; and after distance measurement in the first distance measurement step, the subject distance is determined in the selected beam mode at regular intervals A second distance measurement step in which distance measurement is performed to obtain second distance measurement data corresponding to the subject distance, and the first distance measurement data and second distance measurement data are compared, and the distance measurement data is obtained. The present invention is characterized by comprising a detection step of detecting a change in distance measurement data, and a step of executing a predetermined shirt release operation when a change in distance measurement data is detected by the detection step.

[Effect]

According to the present invention, a predetermined shirt release operation is performed by detecting that the photographer enters the photographing position. In other words, the first distance measurement data that was measured and stored when starting the sequence for self-photography in auto self-mode, and the second distance measurement data that was obtained by repeatedly measuring the distance at a fixed cycle thereafter. Compare with distance data,
It is determined that the photographer has entered the shooting position when the distance measurement data changes. Then, a predetermined shirt release operation (for example, an operation of flashing the self-LED for 3 seconds and then releasing the shutter) is started from the time when the distance measurement data changes.

Note that when photographing in the auto-self mode, there are cases where the single beam mode is advantageous and cases where the multi-beam mode is advantageous, so either one of the beam modes can be selected depending on the shooting situation. For example, if there are many people around the target and the target is wide, shooting will start due to the movement of unrelated people. , it becomes difficult to enter the target, so select multi-beam mode in all cases other than the above.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a self-photographing method using a camera according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the entire circuit of a camera to which the method of the present invention is applied. As shown in the figure, the circuit of this camera includes a central processing unit (CPU) 10, a group of operation switches 12, a photometry section 14, a distance measurement section 16, and a shutter section 1.
8. It mainly consists of a liquid crystal display section 20 and the like.

The operation switch group 12 includes, for example, a camera main switch SM and a shirt release switch SP.

Focus lock switch S P F L, self mode changeover switch 5SELF, film manual rewind switch SMR, distant view or night view control switch 5INF
, an option mode switch 5OFT1, a telescopic operation control switch S position E, a wide operation control switch 5WIDE, etc., and the outputs of these switches are applied to the CPU10.

The photometer 14 measures the brightness of the subject and outputs a signal 5HAE indicating the photometry data and a signal SHγ indicating T correction data of the photoconductive element of the photometer 16 to the CPU10.

The distance measuring unit 16 measures the distance to the subject by triangulation,
The distance measurement data AFD is output to the CPU 10. That is, the CPU10 outputs a drive signal AFLED to the infrared light emitting diode 30 for causing the infrared light emitting diode 30 to emit light during distance measurement, and also outputs an AF logic clock signal AFLCKSAF serial data AFSD for driving the distance measurement section 16; AF serial clock signal AFSCK
is output to the distance measuring section 16. Here, the infrared light emitting diode 30 can emit multiple beams of beams L, C, and R according to the drive signal AFLED from CPU10, and can also emit a single beam of only beam C. There is. Further, the distance measurement unit 16 performs distance measurement using AF serial data AFSD indicating a distance measurement command using the beam LSCSR, and serially transfers this distance measurement data AFD to the CPU10. That is, by operating a button, which will be described later, it is possible to select distance measurement using a single beam mode or distance measurement using a harmonic multibeam mode.

The shutter unit 18 is a stepping motor-driven lens shutter that electromagnetically drives and controls the opening/closing of the shutter blades, and is controlled by the stepping motor drive control signals 5HO1SH1, SH2 and the AF magnet drive control signal SHAFMg applied from the CPU 10. controlled. That is, when performing shutter control, first, the AF magnet is excited by the AF magnet drive control signal SHAFMg to enable lens drive, and the stepping motor is driven by the stepping motor drive control signals 5HO1SHI and SH2 to move the lens. . When the step position corresponding to distance measurement data AFD measured in advance is reached, the AF magnet is demagnetized to enable shutter blade driving. Thereafter, when the stepping motor is further driven, the shutter blade opens. and,
When the step position corresponding to the photometric data 5HAE measured in advance is reached, the stepping motor is reversed, the shutter blade is closed, and the series of operations is completed when the camera returns to the initial position.

As shown in FIG. 2(A), the liquid crystal display section 20 includes a self-timer display section 22, film number display sections 24A and 24B,
It has a film feed display section 26, a battery warning display section 28, etc., and performs necessary display based on a control signal from CPU10. Incidentally, FIG. 2(B) shows the display contents in a mode (hereinafter referred to as normal self mode) in which photographing is performed after a certain period of time has elapsed since the shirt release switch SP was pressed. Further, FIG. 2(C) shows the display contents of a mode for taking self-photographs according to the present invention (hereinafter referred to as auto-self mode), which will be described later.In the case of this auto-self mode, the self-timer section 22, and also use the film number display section 24B to select "A".
" is displayed.

Furthermore, FIG. 2(D) shows the display contents in a mode in which 11 photos are taken in the auto-self mode (hereinafter referred to as multi-auto self-mode). At the same time, "A" is displayed using the film number display section 24A, and the number of films is displayed using the film number display section 24B.

Further, in FIG. 1, the CPU 10 outputs a signal 5ELFLED to the self-light emitting diode 32 to control its lighting during the self-operation. Furthermore, the CPU receives 4-bit signals EA and E indicating the zoom position from the encoder 34.
B, EC, and ED are added, and a signal SO is added from the 1-frame detection switch 36 every time the film is advanced by 1 frame.
The film sensitivity detection switch 38 detects the film's l50
4-bit signals DX2, DX3, DX4, D indicating degree of g
X5 has been added. Further, the CPU10 outputs a date imprinting signal χ to the date imprinting device 40, and also outputs a 3-bit motor drive signal MDO1 to the drive circuit 42 for driving the zoom motor and film feed motor.
Outputs MDI and MD2.

Next, regarding the self-photography method using the camera according to the present invention,
This will be explained in detail with reference to the flowcharts shown in FIGS. 3 and 4.

C[JP 10 operates when the main switch SM of the camera is turned on, performs a key check of the operation switch group 12 at high speed, and when the key force changes, executes processing according to the key.

Now, a case will be described in which the key input from the option mode switch 5OFT changes.

In this case, as shown in FIG. 3, it is first determined whether the switch 5OFT is turned on (step 50). If the switch 5OFT is turned from ON to OFF, the process returns to the main routine (not shown); if the switch 5OFT is turned from OFF to ON, the process proceeds to step 52. That is, the switch 5OFT is a non-locking push-button switch, and when the switch 5OFT is pressed, the process proceeds to step 52 at the moment the switch 5OFT is pressed.

In step 52, it is determined whether the current mode is the auto-self mode or not, and if it is not the auto-self mode, the auto-self mode is set (step 54) and the single beam mode is set (step 56).

On the other hand, if the current mode is auto-self mode,
It is determined whether the mode is single beam mode or multi-beam mode (step 58). If the current beam mode is single beam mode, cancel single beam mode and set multi beam mode in step 6.
0), if the current beam mode is multi-beam mode, cancel auto-self mode (step 62).
.

That is, when the current mode is not auto-self mode, pressing switch 5OFT will set auto-self mode that distances in single beam mode, and then press switch 5 OPT once to set auto-self mode that distances in multi-beam mode. , and then press switch 5OFT once to cancel auto-self mode.

In the above embodiment, the auto self mode (/ngle beam mode) is activated by operating one switch 5OFT.
, auto-self mode (multi-beam mode) and auto-self mode cancellation have been rotated, but this is not limited to this, and the switch for setting/cancelling auto-self mode and switching between single beam mode/multi-beam mode, respectively. It may also be provided.

Next, the case where the shirt release switch is turned on will be explained.

In this case, the CPU 10 first determines whether the photographing mode is set to auto-self mode (step 100). Here, if the auto self mode is not set, it is determined whether the normal self mode is set (step 110). Note that the auto self mode can be set using the obunyon mode switch 5OFT as described above, and the normal self mode can be set using the self mode changeover switch 5SE.
It can be set by LF.

If it is determined in step 110 that the normal selfie mode is not set, normal photography is performed.

That is, while manually inputting distance measurement data from the distance measurement section 16,
Step 120: Manually input photometric data from the photometric unit 14.
130) In order to control the lens extension amount and exposure based on these distance measurement data and photometry data, the stepping motor drive control signals 5HO1SH1, SH2 and the AF magnet drive control signal SHAFMg are sent to the shutter section 18 as described above. After outputting (step 140), the photographing ends.

On the other hand, if it is determined in step 110 that the normal self mode is set, the self LED 32 is turned on for 7 seconds (step 150), and then the self LED 32 is turned on for 7 seconds.
After blinking for seconds (step 160), that is, 10 seconds after pressing the shirt release switch SP, step! Photographing will be carried out via 20.130.140.

Next, a case will be described in which it is determined in step 100 that the auto-self mode is set.

In this case, first, the self-LED 32 is turned on, and the distance measurement unit 16 is set to perform distance measurement in the single beam mode or multi-beam mode selected in advance as described above. Input and store distance data A F (1) (step 200
．． 210).

Next, it is determined whether or not a certain period of time T+ (for example, 0.5 seconds) has elapsed (step 220). After the elapse of time T, the distance measurement section 16 again performs distance measurement, and the distance measurement data ΔF(2
) is manually performed in step 230), and the stored distance measurement data A F (1) is compared with the distance measurement data A F (2) measured after time T1 (step 240).

Then, distance measurement data AF, (1) and distance measurement data ΔF (2
) are equal, it is determined whether a certain period of time T2 (for example, 30 seconds) has elapsed since the auto-self mode started (step 250), and until time T elapses,
Returning to step 220, distance measurement data A F for each time T
The input of (2) and the comparison between the distance measurement data AF (1) and the distance measurement data AF (2) are repeatedly executed.

On the other hand, distance measurement data A F (1) and distance measurement data A F
If (2) is different, it is determined that the photographer has entered the predetermined shooting position, and when the distance measurement data changes, the process moves from step 240 to step 160, and the self-LED is set to 3.
After blinking for seconds, step 120.130.140
Take pictures through.

Furthermore, if the distance measurement data A P (1) and the distance measurement data A F (2) are equal and the distance measurement data does not change during the time T2, the self-LED is turned off after the time T2 has elapsed (step 260). , exit without taking pictures in auto selfie mode.

〔Effect of the invention〕

As explained above, according to the self-photographing method of the camera according to the present invention, since the predetermined shirt release operation is performed upon detecting that the photographer enters the shooting position, it is different from the conventional self-timer device. There is no need to worry about the hassle of creating poses or long waiting times, and there is also the advantage of not having to perform a series of distance measurement operations to measure the distance equidistant from where you are standing before starting self-control. . Furthermore, by using the existing distance measuring means, the cost does not increase significantly compared to the case where a separate remote control transmitter/receiver is provided.

Furthermore, since the single beam mode and the multi-beam mode can be selected, it is possible to measure a subject distance suitable for the photographing situation, and self-photography according to the present invention can be effectively carried out.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the entire circuit of a camera to which the camera self-photography method according to the present invention is applied, and FIGS. The figures used to explain the details, FIGS. 3 and 4, are flowcharts used to explain the self-photographing method of the camera according to the present invention, respectively. DESCRIPTION OF SYMBOLS 10... Central processing unit, 12... Operation switch group, 14... Photometry part, 16... Distance measurement part, 1
8...Shutter section, 20...Liquid crystal display section, 3
0...Infrared light emitting diode, 32...Self light emitting diode.

Claims (1)

[Claims] A selfie camera that has a single beam mode in which a single beam is projected onto an object to measure the distance to the object, and a multi-beam mode in which the object distance is measured by projecting multiple beams onto the object. The photographing method includes the steps of setting an auto-self mode by operating a predetermined button and selecting one of the single beam mode and multi-beam mode, and pressing a shutter release switch while setting the auto-self mode. is turned ON, a step of starting a sequence for taking a self-photograph using the auto-self mode, and measuring a subject distance using the selected beam mode at the start of the sequence, and taking a photo corresponding to the subject distance. a first distance measurement step of storing first distance measurement data; after distance measurement in the first distance measurement step, distance measurement of a subject distance is performed in the selected beam mode at a constant cycle;
A second step that obtains second distance measurement data corresponding to the subject distance.
a distance measurement step, comparing the first distance measurement data and the second distance measurement data,
A self-photographing method for a camera, comprising: a detection step of detecting a change in distance measurement data; and a step of executing a predetermined shutter release operation when the change in distance measurement data is detected by the detection step. .