JPH0884291A - Image reader - Google Patents

Abstract

(57) [Abstract] [Purpose] When a film sensor having magnetic recording information is read by a line sensor, the purpose is to quickly read the magnetic recording information and the image information during prescan. The image reading device of the present invention reads an image of a film having a magnetic recording portion, which is wound and housed in a cartridge. Then, the present apparatus is a conveying unit (12 to 13, 18 to 20) for conveying the film 52.
A transport control means (2) for controlling the transport means so as to transport the film at a constant speed during prescan, and recording on the magnetic recording part when the film is transported at the constant speed by the transport control means. It has a reproducing means (25) for reproducing the recorded information and a photoelectric conversion means (21) for reading the image information and converting it into an electric signal when the film is conveyed at a constant speed by the conveyance control means ( S202 to S206, S210 to S213, S21 of FIG.
5 to S218).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading device. In particular, the present invention illuminates a long film image,
The present invention relates to a transparent original image reading apparatus that photoelectrically converts the image light into an image signal by a line sensor (one-dimensional CCD), performs various kinds of processing on the image signal, converts the digital signal, and outputs the digital signal to a computer or an output device.

[0002]

2. Description of the Related Art Regarding a film for a camera, a film having a magnetic layer in a part of the film is proposed in Japanese Patent Laid-Open No. 5-75922. This film is accommodated in the film cartridge 6 as it is long regardless of whether it is exposed or not. A perforation 3 is provided on the upper end of the film 2. The exposed portions 4, 5 and the like are provided in the central portion of the film 2. At the lower end of the film 2,
A magnetic recording layer 30 is provided. The film cartridge 6 has an opening 7 and a spool 8. Further, a video monitor reproducing machine for reading an image of the film in the film cartridge 6 with a two-dimensional CCD sensor is proposed in Japanese Patent Laid-Open No. 5-75922.

[0003]

However, the video monitor player disclosed in Japanese Patent Laid-Open No. 5-75922 is
Since the two-dimensional CCD sensor is used, the distance between the photoelectric conversion elements forming the two-dimensional CCD sensor becomes rough due to difficulty in manufacturing. Therefore, it is necessary to read a film image inexpensively and with high accuracy.

Therefore, one film having a magnetic recording layer is used.
An object is to provide an image reading device that reads with a three-dimensional CCD sensor. In particular, it is an object of the present invention to speed up the prescan processing.

[0005]

An image reading apparatus of the present invention is for reading an image of a film which is wound up and accommodated in a cartridge and has a magnetic recording portion. Then, the present apparatus is configured to convey the film 52 by a conveying means (12
13 to 18 to 20), a transport control means (2) for controlling the transport means so as to transport the film at a constant speed during prescan, and when the film is transported at a constant speed by the transport control means. A reproducing unit (25) for reproducing the information recorded in the magnetic recording unit, and a photoelectric conversion unit for reading image information and converting it into an electric signal when the film is conveyed at a constant speed by the conveyance control unit. (21) and (S202 to S206 and S2 in FIG. 4).
10-S213, S215-S218).

[0006]

A film having a magnetic recording portion as a part has been proposed. Image information and magnetic recording information must be read from this film. In order to read the magnetic recording information, it is necessary to transport the film at a constant speed. On the other hand, in the image reading device using the one-dimensional photoelectric conversion device, in order to accurately read the image information, it is necessary to stop the feeding of the film every one line and read the RGB signals.

However, it is only necessary to confirm the rough contents of the image information and the contents of the magnetic recording information during the pre-scan, and it is not always necessary to read the image information with high accuracy.
Therefore, the image information and the magnetic recording information are read while the film is being conveyed at a constant speed.

[0008]

FIG. 1 is a diagram for explaining the system configuration of the present invention. The scanner 100 is connected to the external computer 40. The computer 40 includes a monitor 41 for displaying a film image, an operating unit 42 such as a keyboard and a mouse, a storage device 43 such as a RAM, a recording device 44 such as a hard disk drive, a floppy disk drive and a magneto-optical disk drive, and a printer 45. Are connected.

The cartridge mounting chamber 1a of the scanner 100
Can mount the cartridge 51 of the film 52 having the magnetic recording layer disclosed in JP-A-5-75922. The film 52 having a magnetic recording layer will be described with reference to FIG. The film 52 has one end fixed to the spool 51b and can be stored in the film cartridge 51. The film 52 is provided with a perforation 53 and a magnetic recording unit 54 for each frame. In addition, an area of the 0th frame which is not photographed is provided in front of the 1st frame of the photographing frame. A perforation 53 and a magnetic recording unit 54 are provided in the 0th frame area.
Image information is recorded in the exposed portion 55, and image information is not recorded in the unexposed portion 56.

The following information is recorded in the magnetic recording section 54 for each frame when the image is taken by the camera. When the zoom lens is attached, zoom information, F number information and shutter speed information obtained from the AE sensor and the shutter speed setting dial, information on whether or not the flash fired, the exposure correction value set by the exposure correction dial, and The shooting date or shooting time is stored.

Further, on the film cartridge 51, information indicating whether or not the film 52 has been developed and information indicating the type of film are displayed by an optically readable label. The information indicating the type of film includes information indicating whether the film is negative or positive, the maker name of the film, the model number, and information indicating color / black and white.

Next, the structure of the scanner 100 will be described with reference to FIG. The microcomputer 2 receives instructions from the computer 40 and controls each device in the scanner 100. The illumination drive circuit 10 is controlled by the microcomputer 2, and the illumination unit 1
Drive 0a. The illumination unit 10a illuminates the film 52. As shown by the optical axis 15, the light emitted from the illumination unit 10a is reflected by the mirror 8 and condensed by the lens 9, and the accumulation type photoelectric conversion means in which the pixels are arranged one-dimensionally, that is, the one-dimensional CCD sensor 21. To reach. The one-dimensional CCD sensor 21 converts a film image into an electric image signal. The image signal processing circuit 22 digitizes the captured image signal. If it is determined from the label information that the film is a negative film, the image signal processing circuit 22 converts the captured image signal into a positive image signal. The image signal converted by the image signal processing circuit 22 is stored in the frame memory 3.

The lens 9 is a variable focus lens or a fixed focus lens. In the case of a variable power focus type lens, the reading range of the film 52 is enlarged or reduced by a variable power command from the computer 40. In the case of a fixed focus type lens, enlargement / reduction is performed by processing image data in the computer 40. There are the following three methods for obtaining a color image signal. First, the illumination unit 10a has RGB
It has a three color light source of
Method for forming the image signal of the second, secondly, the illumination units 10a and 1
An RGB color filter is provided in the middle of the three-dimensional CCD sensor 21 (not shown), and the color filter is replaced to form an RGB image signal. Third, one-dimensional CC
This is a method in which the D sensor 21 is a color CCD and forms RGB image signals.

The magnetic heads 25a and 25b are the film 5
The information stored in the second magnetic recording layer is read and the information in the magnetic recording layer of the film 52 is written. This reading method will be described later. The detection unit 11a is an optical reading sensor. The detection unit 11a reads the label on the film cartridge 51 described above,
Information on whether or not the film 52 has been developed, the manufacturer name, the model number of the film 52, and color / monochrome are detected. The detection circuit 11 is controlled by the microcomputer 2 and drives the developed detection section 11a.

Perforation detectors 17a and 17b
May optically detect the perforation 53, or may use a contact-type electrical contact so that the perforation 53 is energized for detection. One-dimensional CC
The perforation 53 may be detected from the output of the D sensor 21. The perforation detection circuit 17 is controlled by the microcomputer 2, and the perforation detection unit 17
Drive a and 17b.

The motor drive circuit 12 drives the motor 13. The driving force generated by the motor 13 is transmitted to the spool 51b via the transmission mechanism 14 including a gear train. Therefore, by controlling the rotation direction and rotation speed of the motor 13, the film 52 can be fed and wound. The motor drive circuit 12 includes a motor 13
The pair of rollers 31 is rotated at the same time as the rotation of. The pair of rollers 31 are arranged on the entrance side of the film reading frame.

The motor drive circuit 18 is a circuit for driving the motor 19. The driving force generated by the motor 19 is transmitted to the winding-side spool 16 via the transmission mechanism 20 that is a gear train. Therefore, by controlling the rotation direction and rotation speed of the motor 19, the film 52 can be fed and wound. The motor drive circuit 18 rotates the pair of rollers 32 and 33 at the same time as the rotation of the motor 19. The pair of rollers 32 and 33 are arranged on the entrance side of the film reading frame. The motor drive circuit 12 and the motor drive circuit 18 are controlled by the microcomputer 2 in synchronization with each other after the film is set. That is, when the spool 51b rotates clockwise, the take-up spool 16 also rotates clockwise. However, the rotation of the spool 51b and the rotation of the take-up spool 16 do not have to be completely at the same speed, and the rotation of the take-up spool 16 may be made a little earlier than the rotation of the spool 51b. By doing so, tension can be applied to the film and curling of the film can be suppressed. Further, since the pair of rollers 31 to 33 are provided at the entrance and exit of the film reading frame, it is possible to feed the film flatness and feed the film line by line.

The spool 16 on the take-up side is formed so that the front end of the film is easily wound, and the spool shaft is formed with a convex claw (not shown) which engages the perforation 53. . Next, the operation of this device will be described. The operator mounts the film cartridge 51 in the cartridge mounting chamber 1a. Then, the operator activates the film image reading start mode from the keyboard 42 of the computer 40. If the film storage unit is not closed, the limit switch (not shown) provided in the film storage unit does not turn on, so the start mode does not start. The start mode will be described with reference to the flowchart of FIG.

(Flow for film setting) S10
1, the developed film cartridge 51 is placed in the cartridge mounting chamber 1a based on the detection result of the detection unit 11a.
It is determined whether or not is attached. If NO is determined, the process proceeds to step S102 to warn the computer 40 that the film cartridge 51 is not mounted or that the film 52 is undeveloped. The computer 40 displays a warning on the monitor 41 in response to the warning. The scanner 100 may be provided with a display device and the display device may be caused to give the above warning. By determining whether or not the developed film cartridge is mounted, it is possible to prevent the undeveloped film from being accidentally pulled out from the cartridge 51.

If YES is determined in step S101, the process proceeds to step S103. Step S103
Then, the detection unit 11a detects the film type of the film 52, the manufacturer name, the monochrome / color film, and the like. Next, in step S104, a drive signal is output from the motor drive circuit 12, and the motor 13 is rotationally driven. Then, the driving force of the motor 13 is transmitted to the spool 51b via the transmission mechanism 14. In this way, the leading edge of the film 52 is sent out from the film outlet opening 51a of the cartridge body.

Next, in step S105, the perforation detector 17a causes the perforation 53a of the 0th frame.
Wait to detect. When the perforation 53a is detected in step S105, the motor 13 is driven by a predetermined amount in step S106, and the motor 1 is driven in step S107.
Stop 3. When the motor 13 stops, the film 5
In step S106, the motor 13 is driven by a predetermined amount so that 2 reaches the take-up spool 16.

Next, in step S108, a drive signal is output to the motor drive circuit 12 and the motor drive circuit 18,
The motor 13 is fed and driven, and the motor 19 is wound and driven. Next, in step S109, it is determined whether the perforation detection unit 17a has detected the perforation 53. When the perforation 53 is not detected, the motor 13 and the motor 19 are continuously driven. When the perforation 53 is detected, a stop signal is output to the motor drive circuit 12 and the motor drive circuit 18, and the drive of the motor 13 and the motor 19 is stopped (step S110).

(Flow for pre-scanning) In step S201, magnetic information and RGB image information are read at the same time as the film is fed (flag = 0), or magnetic information is read first and then the film is rewound RG.
It is determined whether or not the mode is the mode for reading the B image information (flag = 1). If flag = 0, the process proceeds to step S202, and if flag = 1, the process proceeds to step S210.

If flag = 0, step S202
Then, the motor 13 and the motor 19 rotate clockwise to feed the film in the cartridge 51 at a constant speed. While the film is being fed at this constant speed, magnetic information is read or written by the magnetic heads 25a and 25b (S203). Further, the one-dimensional CCD 21 reads the RGB image information (S205). Since it is sufficient to obtain an image for film density and color correction, the film feed is stopped for each line and R is strictly set for each line.
It is not necessary to obtain three GB image signals.

The magnetic information written on the film is output in step S204, and the film image is output from the one-dimensional CCD in step S206. Step 20
In 7, the information and the image information are stored in the frame memory 3. The storage information read at this time includes frame number, shooting date, image direction information, shooting size information, color temperature information, and the like. The image direction information is information indicating whether the image is taken by vertical shooting or horizontal shooting. The captured size information is information indicating whether the captured image has a normal size, a panoramic size, a high definition size, a half size, or which part of the captured image is to be trimmed.

In step S208, it is determined whether the film 52 has been fed to the last frame. If the film has not been sent to the final frame, the process returns to step S202, motor feed drive is performed until the final frame is reached, and magnetic information and image signals are taken in. If the film 52 has been fed to the final frame, the process proceeds to step S209. In step S209, the film is rewound by the motor in preparation for the main scan, and the process proceeds to step S220.

On the other hand, if flag = 1, step S
At 210, the motor 13 and the motor 19 rotate clockwise to feed the film in the cartridge 51 at high speed.
While the film is being fed at the constant high speed, the magnetic information is read by the magnetic heads 25a and 25b (S
211), the information is output (S212), and the information is recorded (S213). Since only the magnetic information is read, the information of each frame can be read at a higher speed than in the case of coarse reading of image information described later. The stored information read at this time is, as described above, the frame number, the shooting date and time, the image direction information,
There is information such as shooting size information and color temperature information. The image direction information is information indicating whether the image is taken by vertical shooting or horizontal shooting. The captured size information is information indicating whether the captured image has a normal size, a panoramic size, a high definition size, a half size, or which part of the captured image is to be trimmed.

In step S214, it is determined whether the film has been read up to the last frame. If the last frame has not been read, the process returns to step S210 to read the magnetic information of the next frame. If the last frame is read, the process proceeds to step S215. Whether or not the last frame has been read is determined by the signals from the perforation detection units 17a and 17b described above.

In step S214, the film is rewound at low speed. While the film is being fed at the constant low speed, the one-dimensional CCD 21 reads the RGB image information (S216), outputs the image signal (S217), and records the image signal (S218). Since it is sufficient to obtain an image for film density and color correction, it is not necessary to stop the film feed for each line and obtain the RGB three image signals exactly per line, but if it is too fast, it will be too rough to read. Become. In step S219, it is determined whether or not the film has been read up to the 0th frame. If the 0th frame has not been read, the process returns to step S215 to read the image information of the next frame. If the perforation detection units 17a and 17b described above detect that the 0th frame has been reached, it means that the film has rewound. Then, in preparation for the main scan, the process proceeds to step S220.

In step S220, the frame memory 3
Image signals and the like stored in the RAM 4 of the computer 40
3 is transferred via the SCSI interface (not shown). In step S221, when an image signal is input from the frame memory 3 of the scanner 100 into the computer 40, thumbnail images (a plurality of images reduced and displayed in the monitor) are displayed side by side on the monitor 41. At the time of display, the stored information such as the frame number read from the magnetic recording layer is displayed below the thumbnail display.

Further, the computer 40 outputs the stored information sent to the recording device 44 and records it in the storage medium. The image signal is information read roughly, and since the amount of information is small, it can be recorded at high speed. In step S222, the RGB accumulation time for shading correction and color correction is set for each frame based on the roughly read image information.
Set the amount of illumination light. The operator operates the monitor 41
After confirming the thumbnail image and the magnetic recording information, the frame number to be main-scanned, the reading accuracy, and the reading range are designated from the keyboard 42. After this condition setting is completed, the main scan is started.

(Image Processing and Thumbnail Display) Next, the operation of the image signal processing circuit 22 and the display of image information on the monitor 41 will be described with reference to FIG. The black level output from the one-dimensional CCD 21 is the clamp circuit 2
At 21, it is clamped to a predetermined reference voltage value. Then, the white level output from the one-dimensional CCD 21 is held for a predetermined time by the sample hold circuit 222. The shading correction circuit 223 performs shading correction so that the output from the one-dimensional CCD 21 becomes uniform in all pixels. Also,
The shading-corrected output is γ-corrected by the γ-correction circuit 224 in order to add gradation characteristics. The γ-corrected output is converted into a digital signal by the A / D conversion circuit 225. For example, if a digital signal is displayed with 8 bits, the analog output for each pixel is 0 to 255.
It is converted into a digital signal in stages and stored in the frame memory 3 via the microcomputer 2.

The RGB image signals stored in the frame memory 3 are transmitted to the RAM 43 of the computer 40 via a SCSI interface (not shown). Also,
Information from the detection circuit 11 and the magnetic recording / reproducing device 25 is also transmitted to the storage circuit 46 of the computer 40 via a SCSI interface (not shown). Processing circuit 4
If the information from the storage circuit 46 indicates that the negative film is loaded, the reference numeral 7 inverts the image signal stored in the RAM 43 and outputs it to the monitor 41. In addition, the memory circuit 4
If the information from 6 indicates that the camera was photographed in the vertical state, the image signal is rotated by 90 ° and output to the monitor 41. If the information from the memory circuit 46 is trimming information (panorama size), the image signal according to the trimming information is output to the monitor 41. The processing circuit 47 is composed of an LUT (lookup table) or the like.

Signals such as images and shooting conditions are displayed on the monitor 4.
How to display in 1 will be described. In FIG. 5, the first piece
An example is shown in which thumbnails are displayed up to the 12th frame. Below the image of the first frame obtained by the prescan, "No.
"1", "F8", "Tv250", "+1/2", and "strobe" are displayed. "No. 1" means the first frame. "F8" means that the lens aperture at the time of shooting is F8
It means that it was. “Tv250” means that the shutter speed at the time of shooting was 1/250 seconds. "+1/2" means that the exposure correction value at the time of shooting was +1/2. "Strobe" is
It means that the flash was shot when it was shot. It should be noted that this is merely an example, and the shooting date and time may be displayed in addition to the above, and the layout does not necessarily have to be such.

When the information read from the magnetic recording layer recognizes that the image was taken in the panorama size, the image signal is enlarged and displayed like the images of the fifth frame and the ninth frame. Also, if the camera was shot vertically with the information read from the magnetic recording layer,
Like the images of the sixth frame and the eleventh frame, they are rotated by 90 ° and displayed.

[0036]

The image reading apparatus using the one-dimensional type photoelectric conversion means (CCD line sensor) conveys one line of film to read the image information finely during the main scan, and R (red) G (green) and B (blue) image signals are obtained. Even in an image reading apparatus using such a one-dimensional photoelectric conversion means, magnetic recording information and image information can be obtained while the film is being conveyed at a constant speed during prescan. By doing so, the prescan time can be shortened.

If the magnetic recording information and the image information are read while the film is being conveyed in the first direction, it is easy to control the film conveying mechanism. Also, if the magnetic recording information is read when the film is conveyed in the first direction at a high speed and the image information is read when the film is conveyed in the second direction at a low speed, the prescan time is shortened. In addition, since the speed is slow when reading the image information, a highly accurate image can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration of this embodiment.

FIG. 2 is a schematic view of a film cartridge having a magnetic recording layer.

FIG. 3 is a flow chart for the film set of this embodiment.

FIG. 4 is a flowchart of a prescan according to the present exemplary embodiment.

FIG. 5 is a block diagram relating to image processing and thumbnail display.

[Explanation of symbols]

 9 ... Lens 10a ... Illumination light source 16 ... Winding side spool 21 ... One-dimensional type sensor 31-33 ... Feed roller 51 ... Film cartridge 52 ... Film

Claims (4)

[Claims] 1. A cartridge is wound and stored,
In an image reading apparatus for reading an image of a film having a magnetic recording unit, a transport unit that transports the film, a transport control unit that controls the transport unit to transport the film at a constant speed during prescan, When the film is being conveyed at a constant speed by the conveyance control means, a reproducing means for reproducing information recorded in the magnetic recording unit, and when the film is being conveyed at a constant speed by the conveyance control means. An image reading apparatus comprising: a photoelectric conversion unit that reads the image information and converts the image information into an electric signal. 2. The reproducing device reproduces magnetic recording and the photoelectric conversion device outputs an image signal while the conveying device conveys the film in the first direction. The image reading apparatus according to claim 1. 3. The reproducing means reproduces magnetic recording while the conveying means conveys the film in a first direction, and the conveying means moves the film in a direction opposite to the first direction. The image reading apparatus according to claim 1, wherein the photoelectric conversion unit outputs an image signal while the image is being conveyed in the second direction. 4. The transport control means controls the transport means so that the transport speed of the film in the second direction is slower than the transport speed of the film in the first direction. The image reading device according to claim 3, wherein