JPH09284645A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To read directly an image of all image storage areas having been exposed and an image of part of an image storage area by placing a magnetism sensor toward an upperstream side of a carrying means in a carrying direction from a read position of an image read means so as to avoid rough reading of the all-image storage area. SOLUTION: A read position of a magnetism sensor is arranged at a right position from a right end position (tail end position) B of a magnetic storage section 5a with respect to an image read position A at the left end of an image storage area 5c. In this relation of position, the magnetism sensor is able to read information of the magnetic storage section 5a of the image storage area 5c before the image storage area 5c reaches the image read position A. That is, the magnetism sensor reads information of the magnetic storage section 5a of the image storage area 5c in advance and then reads the image of the image storage area. Thus, the content of the read magnetic information is directly reflected on the reading of the image storage area image so as to realize high speed image reading.

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 for reading an image in each magnetic storage area of a roll film,
Particularly, it relates to improvement of the image reading method.

[0002]

2. Description of the Related Art An image reading device for reading a film image taken by a camera is known as a film scanner. This film scanner is used for reading an image on a negative film or a reversal film and loading the image on a personal computer or the like. 35m that is commercially available
The m-film is automatically stripped or mounted during development. Conventionally, a generally used film scanner is configured to read an image of a film stored in a slide mount or, in the case of a strip film, to store the image in a dedicated holder and read the image. ing.

On the other hand, there is proposed a new standard film which can be handled while being stored in a cartridge even after development and can be added with magnetic information. Conventional film scanners
The image on the roll film stored in the cartridge cannot be read. Therefore, for example, as shown in FIGS. 5 and 6, an image reading apparatus capable of reading an image in each magnetic storage area of a new standard film has been proposed (for example, Japanese Patent Publication No. 5-75922). .

FIG. 5 is an external view of a conventional image reading apparatus using a two-dimensional image sensor. FIG. 6 is a configuration diagram of a conventional image reading apparatus using a two-dimensional image sensor. The details will not be described again because the above publication is referred to. In this publication, the roll film contained in the cartridge is fed out from the cartridge one by one, read by a two-dimensional image sensor, subjected to predetermined image processing, and can be displayed on the screen of the video monitor 60 for each magnetic storage area. The technology is disclosed.

Further, in the above-mentioned publication, a magnetic storage unit is provided for each image storage area of the roll film, and the frame number, whether or not the image storage area has been photographed, whether or not a special day has been photographed, etc. There is disclosed a technique for storing information regarding the shooting of. Further, an image reading apparatus has also been proposed which reads each image storage area image of a roll film by using a one-dimensional image sensor (for example, Japanese Patent Laid-Open No. 7-18.
4101).

[0006]

When the image on the roll film is read, it may be necessary to read the images on all the image storage areas. However, in many cases, it is often desired to selectively read only the images in some image storage areas.
In this case, it is necessary to know what kind of image is in which image storage area. Some image storage areas are unexposed. This does not need to be read originally.

Therefore, in the image reading apparatus disclosed in the above-mentioned publication, the entire image storage area is read by rough reading while feeding one frame at a time from the cartridge set in the apparatus body. In addition, the information in the magnetic storage unit at that time is read. Then, the index image is created and displayed. In this way, a method is adopted in which the exposed image storage area for the main scan can be specified.

However, in order to scan the entire image storage area, some time is inevitably required even in the rough reading. In particular, even when the roll film is photographed only halfway or when there is a partially unexposed image storage area, the image storage area is also optically read, resulting in unnecessary time. It will be. The present invention has been made to solve such a conventional problem, when reading the image of each image storage area of the roll film, without directly reading the entire image storage area, directly exposed all images An object is to provide an image reading device capable of reading an image in a storage area or an image in a part of the image storage area.

[0009]

An image reading apparatus according to a first aspect of the present invention includes a magnetic memory unit provided in a strip shape in the longitudinal direction of the film with an end at a position separated by a predetermined length from the end of the image storage area of the film. Transporting means for transporting the film,
Illuminating means for illuminating the film on the film conveying path, image reading means for receiving the illumination light of the illuminating means via the film on the film conveying path, and reading the image in the image storage area, and conveying means from the reading position of the image reading means And a magnetic sensor for reading information in the magnetic storage unit, which is arranged on the upstream side in the transport direction with a distance greater than or equal to a predetermined length plus the maximum length of the magnetic storage unit.

According to a second aspect of the present invention, in the image reading apparatus according to the first aspect, it is determined whether or not to stop the image reading of the image storage area according to the reading result of the magnetic sensor. It is characterized by comprising a judging means. The image reading device according to claim 3 is the image reading device according to claim 1, wherein when it is determined that the image storage area is unexposed based on the reading result of the magnetic sensor, the image reading of the image storage area is performed. It is characterized by comprising a control means for stopping and controlling the driving of the transport means.

An image reading apparatus according to a fourth aspect is the image reading apparatus according to the second aspect, further comprising selection means for selecting in advance whether or not to activate the determination means.

(Operation) In the image reading apparatus according to the first aspect of the present invention, the magnetic sensor for reading information from the magnetic storage section of each magnetic storage area is provided upstream from the reading position of the image reading means in the carrying direction of the carrying means. They are arranged at a distance of at least the sum of the predetermined length and the maximum length of the magnetic storage unit.

Therefore, the magnetic sensor can always read the information in the magnetic storage portion of the image storage area before the image reading means starts the reading of the image storage area, so that the useless image storage area is read. The image can be read faster. The image reading device according to claim 2 is the image reading device according to claim 1, wherein the determination means determines whether or not to stop the image reading of the image storage area according to the reading result of the magnetic sensor. To do.

Therefore, it is possible to directly select and acquire only an image in a specific image storage area, such as an image storage area in which a birthday photograph exists, without making a rough reading to create an index image and confirming it. In the image reading device according to claim 3, in the image reading device according to claim 1, the control means reads the image in the image storage area when the image storage area is unexposed as a result of reading by the magnetic sensor. Then, the conveyance means is driven and controlled.

Therefore, it is not necessary to create an index image in advance, it is possible to prevent unnecessary image storage areas from being read even if a direct main scan is performed, and it is possible to obtain all the images in the exposed image storage areas in a short time. Comes. According to a fourth aspect of the present invention, in the image reading apparatus according to the second aspect, the selection means preselects whether to activate the determination means. For example, it is possible to deal with the case where it is necessary to unconditionally confirm the entire image storage area.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an image reading apparatus according to an embodiment of the present invention. As shown in FIG. 1, the image reading device 30 is connected to a host computer 40.
The host computer 40 includes an operation unit 41, a monitor 42 and the like.

The monitor 42 has a CRT display screen or a liquid crystal display screen. The monitor 42 displays an image storage area image captured by the host computer 40 from the image reading device 30, information captured by the operation unit 41, and the like. The operation unit 41 generates a required screen on the display screen of the monitor 42. In addition, the operation unit 41 includes an input device such as a keyboard or a mouse used to issue a command or the like to the image reading device 30.

The image reading device 30 includes a main body (hereinafter, referred to as an apparatus main body) 1 and a microcomputer (hereinafter, referred to as a microcomputer) 2. The microcomputer 2 includes a frame memory 3, an illumination drive circuit 10, a developed detection circuit 11, a motor drive circuit 12, a perforation detection circuit 17,
The motor drive circuit 18, the image signal processing circuit 22, the magnetic recording / reproducing circuit 25, etc. are connected.

The motor drive circuit 12 drives / stops the motor 13 and controls the rotation speed. A transmission mechanism 14 which is a gear train is connected to the rotation shaft of the motor 13. Also,
The motor drive circuit 18 controls the drive / stop and the rotation speed of the motor 19. A transmission mechanism 20 which is a gear train is connected to the rotation shaft of the motor 19. At one end (left side in the figure) of the apparatus main body 1, a cartridge mounting chamber 1a is provided. The cartridge 4 is mounted in the cartridge mounting chamber 1a. The driving force of the motor 13 is transmitted to the spool 4a of the cartridge 4 via a transmission mechanism 14 that is a gear train.

As a result, the spool 4 of the cartridge 4 is
One end of the roll film 5 is wound around a and stored as a whole. The other end is fed from the film entrance / exit of the cartridge 4 to the film transport path. In addition, rewinding is performed. On the outer peripheral surface of the film entrance / exit of the cartridge 4, information (film information) about the film to be stored is displayed in an optically readable manner. The film information includes information indicating whether the film to be stored has been developed and information indicating the type of the film.

The information indicating the type of film is information indicating whether the film is a negative film or a positive film, information indicating whether the film is a color film or a black-and-white film, and the manufacturer of the film. And information indicating the model number are included. A developed detection portion 11a is provided on the outer peripheral side of the film entrance / exit of the cartridge 4. The developed detector 11a is a sensor that optically reads the content displayed on the outer peripheral surface of the cartridge 4. The output of the developed detector 11a is input to the microcomputer 2 via the developed detector 11.

A take-up spool 16 is provided at the other end (right side in the drawing) of the apparatus body 1. The driving force of the motor 19 is transmitted to the take-up shaft of the take-up spool 16 via a transmission mechanism 20 that is a gear train. The winding shaft of the winding spool 16 is shaped so that the leading end of the roll film 5 can be easily wound. As a result, the other end of the roll film 5 fed to the film transport path is wound around the winding shaft of the winding spool 16. In addition, rewinding is performed. A roll film 5 is provided between the cartridge 4 and the take-up spool 16.
The transport path is. An illuminating unit 10 a that illuminates the roll film 5 is provided in the transport path of the roll film 5.
The lighting unit 10a is controlled to be turned on / off by the lighting drive circuit 10 which operates according to a command from the microcomputer 2.

In the projection direction of the illumination unit 10a, the mirror 8,
An optical system of the lens 9 and the line sensor 21 is provided.
The mirror 8 is an illuminating unit 1 that passes through the roll film 5.
It is arranged to reflect the projection light of 0a toward the line sensor 21. The lens 9 is adjusted and arranged so as to guide the reflected light of the mirror 8 to the line sensor 21. Line sensor 21
Is an image reading means for reading a film image one-dimensionally. The image signal read by the line sensor 21 is input to the image signal processing circuit 22. Image signal processing circuit 22
Performs digital processing on the image signal read by the line sensor 21 to create image data.

This image data is input to the microcomputer 2. The microcomputer 2 organizes the input image data for each image storage area and stores it in the frame memory 3. Next, FIG. 2 is an external view of a roll film in which a magnetic storage unit is provided for each image storage area. As shown in FIG. 2, the roll film 5 has one end fixed to the spool 4 a of the cartridge 4, is wound around the spool 4 a, and is housed in the cartridge 4. That is, the roll film 5 as a whole is handled while being completely housed in the cartridge 4. The user cannot touch it.

The roll film 5 includes a magnetic storage section 5a and two perforations 5 for each image storage area 5c.
b is provided. The magnetic storage unit 5a stores information regarding shooting, such as a frame number, whether or not the image storage area has been shot, shooting conditions, and a shooting date. The perforations 5b are provided at both ends of the image storage area in the longitudinal direction of the film. The image storage area of frame number 0 is an image storage area that first appears when the other end of the roll film 5 is pulled out from the cartridge 4. However,
This is an image storage area that is not photographed.

Therefore, as shown in FIG. 1, the magnetic sensor 25a and the perforation detection are provided between the cartridge 4 and the illumination unit 10a in the conveyance path of the roll film 5 between the cartridge 4 and the take-up spool 16. Part 17
a and 17b are provided. A magnetic sensor 25b and perforation detection units 17c and 17d are provided between the illumination unit 10a and the take-up spool 16.

Perforation detectors 17a and 17b
The perforation detectors 17c and 17d are sensors that optically detect the perforations 5b. The perforation detection circuit 17 uses the perforation detection unit 17 based on a command from the microcomputer 2.
a, 17b and perforation detection units 17c, 17
d is controlled to drive the perforation detectors 17a, 1
The detection results of 7b and the perforation detection units 17c and 17d are given to the microcomputer 2.

The magnetic recording / reproducing circuit 25 operates on the basis of a command from the microcomputer 2 and controls the magnetic sensors 25a and 25b. The magnetic sensors 25a and 25b are controlled by the magnetic recording / reproducing circuit 25 so that the magnetic storage unit 5a of the roll film 5 is used.
The information stored in the memory is read and the information is written in the magnetic storage unit 5a. Next, FIG. 3 is a diagram showing an arrangement relationship between the image storage area and the magnetic storage unit. As shown in FIG. 3, the magnetic storage section 5a is set in a strip shape with blank portions (α + β) of a predetermined length left on both ends of the image storage area 5c in the longitudinal direction of the film. In addition, in FIG. 3, only one side is shown.

The moving direction of the film is as shown in the figure.
In the direction from right to left, the right side of FIG. 3 is the upstream side of the film moving direction at the time of image reading, and the left side is the downstream side of the film moving direction. The length α is the distance between the right end of the perforation 5b and the left end of the magnetic storage unit 5a at the head in the traveling direction. The length β is a distance between the left end of the perforation 5b and the left end of the image storage area 5c at the head in the traveling direction. These are constant values that are predetermined as the film standard.

The distance between the right end of the perforation 5b and the right end of the magnetic storage unit 5a at the head in the traveling direction is the maximum length for storing information in the magnetic storage unit,
It does not exceed this. The maximum length of the magnetic storage unit is defined as a film standard. In the present embodiment, the reading position of the line sensor 21 and the magnetic sensors 25a and 25b.
Of the magnetic sensors 25a and 25b with respect to the image reading position A at the left end of the image storage area 5c.
The reading position of the right end position (last end position) of the magnetic storage unit 5a.
It is located to the right of B.

That is, the magnetic sensors 25a and 25b are arranged on the upstream side in the film moving direction from the right end position of the magnetic storage section 5a. For example, when the roll film 5 is fed from the cartridge 4 in FIG.
Before reaching (the irradiation position of the illumination unit 10a in FIG. 1),
The magnetic sensor 25a enables the information in the magnetic storage unit 5a of the image storage area 5c to be read.

In other words, this positional relationship makes it possible to read the information in the magnetic storage unit 5a of the image storage area 5c in which the magnetic sensor 25a is present in advance, and then read the image in the image storage area.

In the conventional image reading apparatus, the reading of the magnetic storage unit of a certain image storage area and the reading of the image are performed in parallel. Therefore, it is generally difficult for the conventional image reading apparatus to directly reflect the content of the read magnetic information on the reading of the image. Therefore, conventionally, a rough reading is performed to create an index image, and a main scan is performed on a part or all of the image storage area based on the index image, or a prescan and a main scan are performed twice in the image storage area. The reality is that you have to do or do a read operation.

On the other hand, in the embodiment of the present invention, as a result of setting the above-mentioned positional relationship, it is possible to easily reflect the content of the read magnetic information directly on the reading of the image storage area image. Therefore, in the embodiment of the present invention, it is not necessary to perform double reading as in the conventional case, and high speed image reading can be realized. In the above configuration, the correspondence with the claims is as follows. The roll film 5 corresponds to the film. The image storage area magnet 5c corresponds to the image storage area. The magnetic storage unit corresponds to the magnetic storage unit 5a. The conveying means includes a microcomputer 2, motor drive circuits 12 and 18, motors 13 and 19, a transmission mechanism 14,
20, the cartridge 4, and the take-up spool 16 correspond to each other.

The line sensor 21 corresponds to the image reading means. The magnetic sensors correspond to the magnetic sensors 25a and 25b. The length (α + β) corresponds to the predetermined length. The microcomputer 2 corresponds to the judgment means and the control means. The host computer 40, the operation unit 41, and the microcomputer 2 as a whole correspond to the selection means. Next, FIG. 4 is an operation flowchart of the embodiment of the present invention. Hereinafter, the image reading operation performed by the microcomputer 2 of the present embodiment will be described with reference to FIG.

FIG. 4 shows the operation in the case where the magnetic information of the image storage area is read prior to the reading of the image and all the images in the image storage area are continuously acquired. Here, a camera having no magnetic writing function does not write magnetic information, but only an image. In this case,
Whether the image storage area is valid based on magnetic information,
In other words, it cannot be determined whether the exposure has been completed or not.

Therefore, in the present embodiment, the microcomputer 2
In S1 to S3, the film type of whether the film was taken by a camera having no magnetic writing function is determined. Then, the microcomputer 2 processes the film photographed by the camera having the magnetic writing function after S5. That is, in S1, the microcomputer 2 reads the magnetic information in the magnetic storage unit 5a in the first image storage area. However, the microcomputer 2 does not judge it,
Proceed to S2. In S2, the microcomputer 2 reads the image in the first image storage area and the magnetic information in the next second image storage area.

Then, in S3, the microcomputer 2 makes the first
Although no magnetic information is written in the magnetic storage section of the first image storage area, it is determined whether or not the first image storage area has been exposed. As a result, if there is only an image, the microcomputer 2 makes an affirmative (YES) determination and proceeds to S4. S
In 4, the microcomputer 2 performs optical reading of the entire image storage area by a normal method. A conventional index image is obtained.

In S3, if there is no magnetic information and no exposure is performed, the film type cannot be determined. In this case, the microcomputer 2 repeats the processing of S1 to S3 until it can determine the film type. If the process proceeds to S4 only under the condition that there is no magnetic information, the image in the unexposed image storage area is included in the index image as in the conventional case, which is not appropriate. Since the unexposed image storage area does not need to be read originally regardless of the presence or absence of magnetic information, the image of such image storage area can be excluded from the index image.

However, since this processing is carried out sequentially from the first image storage area of the film, in most cases it can be determined by the first image storage area. On the other hand, if the magnetic information is written in S3, the exposure is normally performed, so the microcomputer 2 makes a negative (NO) determination, and S5
~ Proceed to S10. In S5 to S10, the microcomputer 2 executes the image reading of the present embodiment for the second image storage area and thereafter.

At S5, the microcomputer 2 causes the magnetic storage unit 5a to
It is determined whether or not the magnetic information is written in. If the magnetic information is written, the microcomputer 2 affirms (YES).
Is determined, and the processes of the following S6 and S7 are performed. In S6, the microcomputer 2 reads the image in the image storage area. In S7, the microcomputer 2 advances the number N of image storage areas by one (N = N + 1) and feeds the film for one image storage area.

On the other hand, if the magnetic information is not written in the magnetic storage unit 5a of the image storage area in S5, the microcomputer 2 makes a negative (NO) determination, performs the processing of the next S8, and proceeds to S7. . In S8, the microcomputer 2 stops the image reading of the image storage area. That is, when no magnetic information is written in the magnetic storage unit 5a of the image storage area, it is considered that the image is not exposed. No need to read. Therefore, the roll film 5 is fed by one image storage area without turning on the illumination unit 10a or accumulating the line sensor 21.

At this time, during the operation period for feeding one image storage area, only the magnetic storage portion 5a is read. Therefore, film feeding can be performed at the maximum speed at which magnetic information can be read. The film can be fed at a higher speed than when optical reading is performed in parallel. In the next S9, the microcomputer 2 determines whether or not the image storage area is the final image storage area as a result of the film feeding for one image storage area in S7.
If it is not the final image storage area, the microcomputer 2 makes a negative (N
O) is judged. Then, the microcomputer 2 executes the next S10.
Then, read the magnetic information of the N + 1th image storage area,
Return to S5.

The microcomputer 2 repeatedly reads only the exposed image storage area by preceding reading of the magnetic information in the magnetic storage unit 5a until the final image storage area is detected in S9. And the microcomputer 2
If it is detected in S9 through S7 that the final image storage area has been reached, an affirmative (YES) determination is made, and this procedure ends.

As described above, in the embodiment of the present invention, the reading of the magnetic information in the image storage area is performed prior to the reading of the image. In the embodiment of the present invention, the exposed image storage area is optically read. In an embodiment of the invention, the unexposed image storage area is fed as fast as possible. Therefore, in the embodiment of the present invention, the total time for creating the index image can be shortened. In addition, if the magnetic information in the image storage area is used for reflection when the main scan image is obtained, the conventional method is as follows. That is, conventionally, rough reading is performed to create an index image. At that time, the magnetic information is also read and placed. Then, it is displayed on the monitor 42, the exposed image storage area is selected, and the main scan is performed. At this time, magnetic information is used. Thus, conventionally, two reading operations have been required.

However, as described above, the index image according to the embodiment of the present invention can obtain and reflect the magnetic information before the image is read. That is, the index image according to the embodiment of the present invention corresponds to the conventional main scan. In the embodiment of the present invention, the optimum image reflecting the magnetic information can be obtained even in the index image. The data of the index image is stored in the host computer 40 as a database.
The user can display the desired image on the monitor 42 and select the desired image to perform the main scan.

In this case, according to the embodiment of the present invention, the frame number, the photographing date, etc. written in the magnetic storage unit 5a are read in advance, and the image can be read immediately when the corresponding image storage area is found. In this case, whether or not to stop the reading is not determined based on whether or not the magnetic information is written, but is determined based on the content of the written magnetic information such as the frame number and the shooting date such as birthday. Can be easily realized.

On the other hand, it is possible to allow the user to select and specify from the operation unit 41 whether or not to execute the process of stopping the reading according to the content of the written magnetic information. In the embodiment described above, in consideration of the fact that some cameras do not have a magnetic information writing function, the film is photographed by a camera having no magnetic information writing function according to the result of the first image storage area. It was judged whether it was done. However, the user may be allowed to select and specify from the operation unit 41 whether or not this determination operation is always performed. This is because the user may know in advance whether or not the film was taken by a camera that does not have a magnetic information writing function.

If the film is photographed by a camera having a magnetic information writing function, it is determined whether or not to stop the reading, depending on whether or not the magnetic information is written from the first image storage area. To do so. Further, the image reading device is not limited to one using a line sensor, and
It is needless to say that the same can be applied to an image reading apparatus using a three-dimensional image sensor.

[0050]

As described above, in the image reading apparatus according to the first aspect, the image reading means determines the relationship between the reading position of the image reading means and the reading position of the magnetic sensor. Before starting, the magnetic sensor has a relationship to read information in the magnetic storage unit of the image storage area, so that it is possible to prevent unnecessary image storage area images from being read, and to specify a desired image storage area image in a short time. Can be read.

Specifically, it can be configured as in claims 2 and 3. That is, in the image reading device according to the second aspect, the image is read only in the image storage area having a photo of a special day such as a birthday without checking the index image in advance, and the other image storage areas are read. You can choose not to read the image. Further, in the image reading apparatus according to the third aspect, the image can be read only in the exposed image storage area by passing through the unexposed image storage area. Therefore, it is not necessary to create an index image by rough reading in advance, and it is possible to prevent unnecessary image storage areas from being read even if the main scan is performed directly, and to obtain all the images in the exposed image storage areas in a short time. You can

The image reading apparatus according to the fourth aspect can cope with the case where it is necessary to confirm the images in the entire image storage area in advance.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an image reading apparatus according to an embodiment of the present invention.

FIG. 2 is an external view of a roll film provided with a magnetic storage unit for each image storage area.

FIG. 3 is a diagram showing an arrangement relationship between an image storage area and a magnetic storage unit.

FIG. 4 is an operation flowchart of the embodiment of the present invention.

FIG. 5 is an external view of a conventional image reading apparatus using a two-dimensional image sensor.

FIG. 6 is a configuration diagram of a conventional image reading apparatus using a two-dimensional image sensor.

[Explanation of symbols]

 1 Device Main Body 1a Cartridge Installation Room 2 Microcomputer 3 Frame Memory 4 Cartridge 5 Roll Film 5a Magnetic Storage Section 5b Perforation 8 Mirror 9 Lens 10 Illumination Drive Circuit 10a Illumination Section 11 Developed Detection Circuit 11a Developed Detection Section 12 Motor Drive circuit 13 Motor 14 Transmission mechanism 16 Take-up spool 17 Perforation detection circuit 17a Perforation detection unit 17b Perforation detection unit 17c Perforation detection unit 17d Perforation detection unit 18 Motor drive circuit 19 Motor 20 Transmission mechanism 21 Line sensor 22 Image signal processing circuit 25 Magnetic Recording / reproducing circuit 25a Magnetic head 25b Magnetic head 30 Image reading device 40 Host computer 41 Operation unit 4 Monitor

Claims (4)

[Claims] 1. A transport means for transporting a film having a magnetic storage portion provided in a strip shape in a longitudinal direction of the film at a position separated from an end portion of an image storage area of the film by a predetermined length, and the film on the film transport path. Illuminating means for illuminating, image reading means for receiving the illumination light of the illuminating means via the film on the film transport path, and reading the image in the image storage area, and the reading position of the image reading means of the transport means. An image reading device comprising a magnetic sensor for reading information in the magnetic storage unit, which is arranged on the upstream side in the transport direction with a distance greater than or equal to the sum of the predetermined length and the maximum length of the magnetic storage unit. apparatus. 2. The image reading apparatus according to claim 1, further comprising a determination unit that determines whether or not to stop the image reading of the image storage area according to the reading result of the magnetic sensor. Image reading device. 3. The image reading apparatus according to claim 1, wherein when it is determined that the image storage area is unexposed based on the reading result of the magnetic sensor, the image reading of the image storage area is stopped and the conveyance is performed. An image reading apparatus comprising a control unit for driving and controlling the unit. 4. The image reading apparatus according to claim 2, further comprising a selection unit that selects in advance whether or not to operate the determination unit.