JPH1013737A - Image reading device and storage medium for storing control procedure for image reading device - Google Patents

Abstract

(57) Abstract: The present invention relates to an image reading apparatus for reading an image of a film taken by a camera, wherein a DC motor can be used as power for a moving means for performing sub-scanning, and a plurality of image storages are provided. It is an object of the present invention to provide an image reading apparatus capable of controlling the timing of sub-scanning in a simple manner when continuously reading each image of a film in which an area is set, and a storage medium for storing a control procedure. SOLUTION: A plurality of image storage areas 5a are set at a predetermined interval, and a plurality of marks 5b are set at at least one side in a short direction at a constant interval along a longitudinal direction. The mark detecting means 4 for detecting the mark 5b moving in accordance with the relative movement in the sub-scanning direction by the moving means 9, and the time interval of the sub-scanning in a certain image storage area 5a is set to the preceding image storage area 5a. And a scanning timing determining means 1 for determining based on the mark detection signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading an image of a film taken by a camera, and a storage medium for storing a control procedure for the image reading apparatus. The present invention relates to a sub-scan timing control method for continuously reading each image.

[0002]

2. Description of the Related Art An image reading apparatus for reading an image of a film taken by a camera is known as a film scanner. This film scanner is used to read an image of a negative film or a reversal film and take it into a so-called personal computer or the like.

In this type of image reading apparatus, there are a transmission type in which light transmitted through a film original is given to an image reading means (hereinafter referred to as a "line sensor") and a reflection type in which reflected light from a film original is given to a line sensor. Regarding the relationship between the line sensor and the film original, there are cases where the film original is moved with respect to the line sensor and cases where the film original is reversed.

Here, the line sensor includes an image storage unit as a plurality of photoelectric conversion units arranged in a line, and a transfer unit for transferring charges stored in each image storage unit. In the line sensor, the scan stored in each image storage unit is sequentially transferred from one end in the longitudinal direction to the other end in a scan in which the charge stored in each image storage unit is transferred to the transfer unit and read out. This image reading scan is called main scanning, and the direction is called main scanning direction.

The image in the image storage area of the film is read by moving the film original and the line sensor relatively in the sub-scanning direction, which is the direction intersecting with the main scanning direction, by the moving means. Sub-scan time interval,
That is, when the number of sub-scans is different for each image storage area,
Extension or contraction in the sub-scanning direction occurs, which is not preferable. In particular, when each image of a film in which a plurality of image storage areas are set at predetermined intervals is continuously read, extension and shrinkage in the sub-scanning direction are remarkably recognized.

[0006] Films in which a plurality of image storage areas are set at predetermined intervals include, for example, a roll film housed in a cartridge and a strip film in which a plurality of frames are connected. Therefore, a stepping motor is generally used as the power of the moving means for performing the sub-scanning. The accuracy of the speed control is increased so that the number of sub-scans for each image storage area is constant.

[0007]

However, when a stepping motor is used, a complicated control system is required, and it is expensive including the motor. This contributes to an increase in the cost of the image reading device. Therefore, a DC motor (hereinafter referred to as “DC motor”) can be obtained at a low cost. Therefore, it is conceivable to adopt a DC motor as the power of the moving means for performing the sub-scan in order to reduce the cost.

At that time, it is desired to realize the sub-scan timing control by a simple method. However, DC motors are susceptible to load fluctuations. Therefore, how to realize the sub-scan timing control becomes a problem.
The present invention has been made in order to solve such a problem, and a DC motor can be used as the power of the moving means for performing the sub-scanning, and each image of the film in which a plurality of image storage areas are set is used. It is an object of the present invention to provide an image reading apparatus capable of controlling the timing of sub-scanning when reading continuously by a simple method and a storage medium for storing a control procedure for the image reading apparatus.

[0009]

According to a first aspect of the present invention, there is provided an image reading apparatus, wherein a plurality of image storage areas are set at predetermined intervals, and a plurality of marks are provided on at least one side in the short direction in the long direction. Illuminating means for illuminating a film original set at regular intervals along the line, and image reading means for scanning the illumination light of the illuminating means input via the film original in the main scanning direction and reading an image in an image storage area A moving means for relatively moving the film original and the image reading means in a sub-scanning direction, which is a direction intersecting with the main scanning direction, and detecting a mark which moves with the relative movement in the sub-scanning direction by the moving means. Mark detection means for outputting a mark detection signal;
Scanning timing determining means for determining a time interval of the sub-scanning in a certain image storage area based on a mark detection signal in a preceding image storage area.

According to a second aspect of the present invention, in the image reading apparatus according to the first aspect, the mark detecting means includes:
An image reading unit that photoelectrically converts light from the mark and outputs a mark detection signal by scanning in the main scanning direction. An image reading apparatus according to a third aspect of the present invention includes: an illuminating unit that illuminates a film original in which a plurality of image storage areas are set at predetermined intervals; and main scanning of illumination light input from the illuminating unit through the film original. Scanning in the direction, the image reading means to read the image projected in the image storage area, and moving means for relatively moving the film original and the image reading means in the sub-scanning direction, which is a direction intersecting the main scanning direction, Speed detecting means for detecting the speed of the relative movement in the sub-scanning direction by the moving means, and controlling the moving means based on the detection speed of the speed detecting means so as to make the time interval of the sub-scanning in the image storage area constant. Control means.

According to a fourth aspect of the present invention, in the image reading apparatus of the first aspect, the mark is a perforation provided on a film original. According to a fifth aspect of the present invention, in the image reading apparatus of the first aspect, the mark is a density difference pattern displayed on a film document.

According to a sixth aspect of the present invention, in the image reading apparatus of the first or third aspect, the power of the moving means is a DC motor. The image reading device according to claim 7 is configured as follows.
Further, in the image reading apparatus according to any one of the third to third aspects, the image reading unit is a color linear image sensor.

In a storage medium for storing a control procedure for the image reading apparatus according to the present invention, a plurality of image storage areas are set at predetermined intervals, and a plurality of marks are provided on at least one side in the short direction. Illuminating means for illuminating a film original set at regular intervals along the longitudinal direction, and image reading for photoelectrically converting light input via the film original and outputting an image signal by scanning in the main scanning direction Means, a moving means for relatively moving at least one of the film original and the image reading means in a sub-scanning direction which is a direction intersecting with the main scanning direction, and moving with the relative movement in the sub-scanning direction by the moving means. A mark detection means for detecting a mark to be output and a mark detection means for outputting a mark detection signal. The time interval in the sub-scanning, and to store the scan timing determination procedure determining on the basis of a mark detection signal in one previous image storage area.

According to a ninth aspect of the present invention, there is provided a storage medium for storing a control procedure for the image reading apparatus, wherein the illuminating means illuminates a film document in which a plurality of image storage areas are set at predetermined intervals, and An image reading unit that photoelectrically converts the input light and outputs an image signal by scanning in the main scanning direction, and at least one of the film document and the image reading unit in a sub scanning direction that is a direction intersecting with the main scanning direction. A storage medium for storing a control procedure for an image reading apparatus having a moving means for relatively moving and a speed detecting means for detecting a speed of a relative movement in the sub-scanning direction by the moving means, comprising: Based on the detection speed of
It is characterized by storing a control procedure for controlling the moving means so as to make the time interval of the sub-scanning in the image storage area constant.

(Operation) In the image reading apparatus according to the first aspect, the illuminating means includes a plurality of image storage areas set at predetermined intervals, and a plurality of marks formed on at least one side in the short direction. A film original set at regular intervals along the direction is illuminated, and the image reading unit scans the illumination light of the illuminating unit input through the film original in the main scanning direction to read an image in the image storage area. At the same time, the moving unit relatively moves the film original and the image reading unit in the sub-scanning direction, which is a direction intersecting with the main scanning direction, and reads the image imprinted in each image storage area.

At this time, the mark detecting means detects a mark moving in accordance with the relative movement in the sub-scanning direction by the moving means, and the scanning timing determining means determines a time interval of the sub-scanning in a certain image storage area. , Determined based on a mark detection signal in the image storage area that precedes by one. That is,
The sub-scan timing control can be performed by a simple method in which the mark detecting means detects the mark.

According to a second aspect of the present invention, in the image reading apparatus of the first aspect, the mark detecting means is also used as the image reading means. Therefore, the timing control of the sub-scanning can be performed by a simple method of detecting the mark by reading the mark by the image reading unit. 4. The image reading apparatus according to claim 3, wherein the illuminating unit illuminates a film original in which a plurality of image storage areas are set at predetermined intervals, and the image reading unit is input via the film original. The scanning light is scanned in the main scanning direction to read the image projected on the image storage area, and the moving unit moves the film original and the image reading unit in the sub-scanning direction, which is a direction intersecting with the main scanning direction. Move to

At this time, the speed detecting means detects the speed of the relative movement in the sub-scanning direction by the moving means, and the control means controls the sub-scanning in the image storage area based on the speed detected by the speed detecting means. The moving means is controlled to keep the time interval constant. That is, the timing control of the sub-scanning can be performed by a simple method known as feedback control.

According to a fourth aspect of the present invention, in the image reading apparatus of the first aspect, a film original having perforations as marks can be read. According to the image reading apparatus of the fifth aspect, in the image reading apparatus of the first aspect, a film original having a density difference pattern as a mark can be read. According to a sixth aspect of the present invention, in the image reading apparatus according to any one of the first and third aspects, a DC motor is employed as power for the moving unit. Therefore, the cost of the apparatus can be reduced.

According to a seventh aspect of the present invention, in the image reading apparatus of the first or third aspect, a color linear image sensor is employed as the image reading means. Therefore, the illumination means does not need the light source switching function, and the configuration can be simplified. Claim 8
According to the invention described in claim 9 and claim 9, claim 1 and claim 3
And a storage medium for storing a control procedure corresponding to the image reading apparatus described in (1).

[0021]

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 a first embodiment of the present invention. As shown in FIG. 1, this image reading apparatus includes a central processing unit (hereinafter, referred to as “CPU”) 1, a memory 2, an A / D converter 3, a line sensor (hereinafter, referred to as “CCD”) 4, a lens 6, a light source, 7, a motor drive circuit 8, a DC motor 9, and the like.

The rotating shaft of the DC motor 9 is a winding shaft 10. The film original 5 is wound on the winding shaft 10 from the transport path and is fed to the transport path. At this time, it should be noted that as the film original 5 is wound on the winding shaft 10, the winding diameter increases, and the winding speed of the film original 5 increases accordingly. is there.

The film original 5 has a plurality of image storage areas 5
a is set at a predetermined interval. In addition, film manuscript 5
In the example, a plurality of perforations 5b, which are marks, are set at regular intervals along the longitudinal direction on both sides in the lateral direction. The film original 5 is, for example, a 35 mm film. A CCD 4, a lens 6, and a light source 7 are arranged in a transport path of the film original 5. The light source 7 illuminates the entire width of one surface of the film document 5. The lens 6 is arranged such that light transmitted through the entire width of the film original 5 is incident on the light receiving surface of the CCD 4.

The CCD 4 has R (red), G (green), B
A color linear image sensor that can simultaneously read three colors (blue) or a monochrome linear image sensor may be used. When a monochrome linear image sensor is used, three light sources of R (red), G (green), and B (blue) are switched on the light source 7 side. When a color linear image sensor is used, the light source 7 may be a white light source, and the configuration is simplified.

The CCD 4 receives the transmitted light of the film original 5 and outputs an image signal obtained by reading the image transferred to the image storage area 5a and the optical information on the perforations 5b. The image signal is converted into a digital signal having a bit width by the A / D converter 3 as appropriate, and stored in the memory 2.

The CPU 1 extracts optical information about the perforations 5b stored in the memory 2, and detects the presence or absence of the perforations 5b, the number of the perforations 5b in the image storage area 5a, and the like. The CPU 1 controls the image storage area 5a.
The number of sub-scans in is obtained. The CPU 1 determines the number of sub-scans in the next image storage area 5a based on the obtained number of sub-scans.

Then, the CPU 1 sends a speed control command to the motor drive circuit 8 based on the determined number of sub-scans. As a result, the motor drive circuit 8 controls the winding speed of the DC motor 9 to a speed at which the determined number of sub-scans can be obtained. In the above configuration, the correspondence with the invention described in the claims is as follows. The film original corresponds to the film original 5. The image storage area corresponds to the image storage area 5a. The perforations 5b correspond to the marks.

The light source 7 corresponds to the illumination means. The CCD 4 corresponds to the image reading means and the mark detecting means. The CCD 4 corresponds to the color linear image sensor.
The entirety of the motor drive circuit 8 and the DC motor 9 correspond to the moving means. The CPU 1 corresponds to the scanning timing determining means. The storage medium is a storage medium 3 such as a CD-ROM.
0a corresponds.

Next, the operation of the CPU 1 according to the first embodiment will be described with reference to FIGS. FIG. 2 is a diagram showing the relationship between perforations and sub-scanning. FIG. 3 is an operation flowchart of the first embodiment. Film manuscript 5
As described above, for example, a general 35 mm film is used. As shown in FIG. 2A, one image storage area 5a
, Eight perforations 5b are provided at equal intervals.

Therefore, as shown in FIG. 3B, the output level of the CCD 4 in a portion outside the image storage area 5a (hereinafter referred to as a "perforated portion") has a low level and a perforated portion where there is no perforation. The part periodically changes to a high level. CPU1
Performs perforation detection based on a magnitude comparison between the level change and a threshold indicated by a dotted line, and increments a perforation counter as shown in FIG. 2D.

As described above, when the film original 5 is wound around the winding shaft 10, the winding diameter increases as the film is wound. Accordingly, the winding speed of the film original 5 increases. Therefore, the number of sub-scans of the image storage area 5a (hereinafter, referred to as "frame") also gradually decreases. Therefore, the film document 5 is taken up on the take-up shaft 10, and the number of sub-scans for one screen of a frame to be read first is used as a reference. If the reference value is, for example,
As shown in FIG. 2C, if the number is 80, the number of sub-scans in one perforation cycle is 10 each.

If the feed time per screen of the first frame is 1 second, the sub-scan is performed at a period of 1/80 second in the first frame. As shown in FIG.
In S1, the CPU 1 sets an initial value of a sub-scanning time interval which is a reading cycle of the CCD 4. The feed speed of the film original 5 depends on the rotation unevenness of the DC motor 9 and the winding amount of the winding shaft 10. However, the feed speed of the film original 5 is considered to be within a certain range for the first frame. As the initial value, a value within a certain range is set.

Specifically, in S1, the CPU 1 sets the CC
As the initial value of the sub-scanning time interval, which is the reading cycle of D4, in the first frame, the time for one screen is calculated from the feed speed. Then, the CPU 1 sets a time interval obtained by dividing the time by a predetermined number of sub-scans (so-called number of lines) for reading one screen as an initial value. In the above example, it is set to 1/80.

Then, the CPU 1 starts lighting the light source 7 and driving the DC motor 9 in S2. CPU1
Reads the film original 5 by the CCD 4 as follows. First, in S3, the CPU 1 sets the count value of the number of sub-scans to 0. Next, the CPU 1 executes S
In step 4, one line is read in the first frame for three colors of R (red), G (green), and B (blue). Then, in S5, the CPU 1 sets the count value of the number of sub-scans to 1.

When reading of one line is completed, the CPU
1 is a specific color (for example, G (green)) in the next S6
Is used to measure the level of the perforated portion.
Then, in S7, the CPU 1 compares the measured level with the threshold to determine whether or not perforation has been detected. As shown in FIG. 2B, when the measurement level is lower than the threshold, it is determined that the part is not a perforation, and when it is higher, it is determined that the part is a perforation.

If the determination in step S7 is negative (NO), the CPU 1 returns to the process in step S4, and if the determination is positive (Y
(ES) until the next line is read and (S4, S
5) and performing the perforation detection operation (S6, S7) are repeated. Then, when the determination at S7 is affirmative (YES), the CPU 1 performs the processing at S8 and S9.

In S8, the CPU 1 increments the perforation counter by one. In S9, the CPU 1 determines whether the count value of the perforation counter has reached 8 or not.

If the determination in S9 is negative (NO), the CPU 1 returns to the processing in S4, and reads the next line, (S4, S5) and the perforation detection operation until the determination becomes affirmative (YES). (S6, S7) and the step of moving the perforation counter (S8) are repeated. Then, the CPU 1 determines that the determination in S9 is affirmative (YE
In S), the processing of S10 and S11 is performed.

In S10, the CPU 1 increments the frame number counter by one. In S11, the CPU 1 determines whether or not the next frame is the last frame. Next, the CPU 1 executes S1
If it is determined in step 1 that the frame is not the last frame (NO), the process returns to step S3 via S12, and shifts to reading of the next frame.

If the CPU 1 determines that the last frame is affirmative (YES) in S11, the process proceeds to S1.
In step 3, the drive of the DC motor 9 is stopped, and the procedure ends. Here, as the number of frames to be read increases, the winding thickness of the winding shaft 10 increases. Accordingly, the moving speed of the film original 5 at the reading position of the CCD 4 gradually increases. As a result, the number of sub-scans for counting eight perforations becomes smaller than 80 times.

Therefore, the CPU 1 counts eight perforations in each frame,
The number of sub-scans in each perforation cycle is counted. As shown in FIG. 2, in the first frame, the number of sub-scans in each perforation cycle is ten. In one frame, the number of sub-scans in each perforation cycle is considered to be an equal constant value. Therefore, the number of sub-scans in at least one perforation cycle may be counted and multiplied by eight.

Then, in S12, which is the pre-process for moving to the next frame, the CPU 1 determines the number of sub-scans in the frame to be read this time with reference to the number of sub-scans in the immediately preceding frame. Specifically, assuming that the number of sub-scans for counting eight perforations is n,
The read cycle is reset to (1/80) × (n / 80).

As a result, the number of sub-scans in one frame is kept at 80 times. That is, even if the moving speed of the film original 5 changes, the number of sub-scannings does not change accordingly. Therefore, according to the embodiment of the present invention, a stable image without extension or contraction in the sub-scanning direction can be obtained.
As is clear from the above description, the number of sub-scans required for resetting the reading cycle does not need to be all for one frame. The number of necessary sub-scans may be any number as long as a certain relationship can be read with the total number of sub-scans for one frame.

In addition to winding a film original with a DC motor, for example, a mechanism for driving the film original with rollers, a mechanism for driving a member to which the film is fixed, a light source,
The present invention can be similarly applied to a case where a DC motor is used for power of a mechanism for driving a set of a lens and a CCD. Further, it goes without saying that the number and arrangement of perforations are not particularly limited. For detection of perforation, a dedicated detection mechanism such as a photo interrupter may be used.

On the other hand, the detection criterion for the number of sub-scans does not necessarily need to be perforation. For example, a density difference pattern displayed on a film may be used. That is, the detection criterion for the number of sub-scans may be any mark that can be optically identified. Next, FIG. 4 is a configuration diagram of an image reading apparatus according to a second embodiment of the present invention. As shown in FIG.
In the second embodiment, in the configuration of the first embodiment, the CPU 1 is replaced by a CPU 11, and a speed detection circuit 12, a roller 13, and a servo circuit 14 are added.

The roller 13 rolls on one end surface in the width direction of the film original 15 moved by the DC motor 9, and gives a change in the rotation state to the speed detection circuit 12. The speed detecting circuit 12 detects the moving speed of the film original 15 from the number of rotations of the roller 13 and supplies the detected speed to the CPU 11. The CPU 11 issues a motor speed instruction to the servo circuit 14 based on the speed detected by the speed detection circuit 12.

The servo circuit 14 controls the motor drive circuit 8 in accordance with an instruction from the CPU 11 so as to keep the DC motor 9 at a constant speed. Note that, unlike the first embodiment, it is not a requirement that the film original 15 have a perforation or a density difference pattern. In the above configuration,
The correspondence with the claims is as follows. The film original corresponds to the film original 15. The image storage area corresponds to the image storage area 5a.

The light source 7 corresponds to the illumination means. The CCD 4 corresponds to the image reading means. The CCD 4 corresponds to the color linear image sensor. The entirety of the motor drive circuit 8 and the DC motor 9 correspond to the moving means. The speed detection circuit 12 and the entire roller 13 correspond to the speed detection means. The whole of the CPU 1 and the servo circuit 14 corresponds to the control means. The recording medium corresponds to a recording medium 30a such as a CD-ROM.

Next, FIG. 5 is an operation flowchart of the second embodiment. The operation of the CPU 11 according to the second embodiment will be described with reference to FIG. In the first S21, the CP
U11 sets the reading cycle of the CCD 4 to an initial value.
Then, in the next S22, the CPU 11 starts turning on the light source 7 and driving the DC motor 9. The CPU 11 uses C
Reading of the film original 15 by the CD 4 is performed as follows.

In S23, the CPU 11 sets the count value of the number of sub-scans to 0. In S24, the CPU 11 reads one line in the first frame with R (red), G
(Green) and B (blue). And S25
Then, the CPU 11 sets the count value of the number of sub-scans to 1. Then, in S26, the CPU 11 determines whether or not the number of sub-scans has reached the specified number. The CPU 11
If the determination in S26 is negative (NO), the process returns to S24, and the reading of the next line (S24, S25) is repeated until the determination is affirmative (YES).

If the determination in S26 becomes affirmative (YES) in the course of the above-described repetitive operation, the CPU 11 stops driving the DC motor 9 in S27, and ends this procedure.
As described above, in the second embodiment, since the feedback control system of the DC motor 9 is added, the configuration is slightly more complicated than in the first embodiment. However, the second embodiment has an advantage that the control procedure is simplified.

The film original 15 does not require a perforation or a density difference pattern. Therefore, the second embodiment is suitable for an image reading apparatus that handles a film document in which these do not exist. Although the transmission type image reading apparatus has been described, the invention can be similarly applied to a reflection type image reading apparatus.

The CPU 1 (11) is connected to the host computer 30. The host computer 30
In addition to a central processing unit, a program memory and a working memory, a hard disk drive, and the like, an unillustrated input device such as a keyboard and a mouse and an output device such as a display device are provided. Usually, the CPUs 1 and 11 start a reading operation or the like in response to a start command from the host computer 30.

In the above embodiment, the CPU of the image reading device is stored in the memory of the image reading device, which is a storage medium.
The control programs 1 and 11 are stored. A central processing unit of the host computer 30 may be used instead of the CPUs 1 and 11 of the image reading device. Further, instead of the memory 2 of the image reading device, a host computer 30 is used.
The hard disk drive and the memory inside may be used. In that case, the program shown in the flowcharts of FIGS. 3 and 5 may be stored in the hard disk. Then, by reading out the program stored in the hard disk in memory, the CPU of the host computer 30 can execute the program.

The programs shown in the flowcharts of FIGS. 3 and 5 stored in the hard disk are stored in a CD-ROM so that they can be set up in the host computer in advance.
Etc. in a storage medium 30a.

[0056]

As described above, in the image reading apparatus according to the first aspect, the mark is detected, and the time interval of the sub-scanning in a certain image storage area is detected by the mark detection in the preceding image storage area. The sub-scan timing control can be performed by a simple method of determining based on the result.

According to the image reading apparatus of the present invention, the mark is detected by using the image reading means, and the sub-scanning time interval in a certain image storage area is determined based on the detection result. Scan timing control can be performed. In the image reading apparatus according to the third aspect, the speed of the relative movement in the sub-scanning direction by the moving means is detected, and the moving is performed so as to make the time interval of the sub-scanning in the image storage area constant based on the detected speed. The sub-scanning timing can be controlled by a simple method of controlling the means.

Further, the present invention is suitable for an image reading apparatus for reading a film original having no mark. According to the image reading apparatus of the fourth aspect, in the image reading apparatus of the first aspect, a film original having perforations as marks can be read. According to the image reading apparatus of the fifth aspect, in the image reading apparatus of the first aspect, a film original having a density difference pattern as a mark can be read.

According to a sixth aspect of the present invention, in the image reading apparatus of the first or third aspect, a DC motor is used as the power of the moving means. Therefore, the cost of the apparatus can be reduced. According to a seventh aspect of the present invention, in the image reading apparatus of the first or third aspect, a color linear image sensor is employed as the image reading means. Therefore, the illumination means does not need the light source switching function, and the configuration can be simplified.

According to the inventions described in claims 8 and 9,
A storage medium for storing a control procedure corresponding to the image reading device according to the first and third aspects can be provided. In short, according to the present invention, an inexpensive DC motor can be employed, and the timing of sub-scanning can be controlled by a simple method. Therefore, according to the present invention, the cost of the apparatus can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a relationship diagram between perforation and sub-scanning.

FIG. 3 is an operation flowchart of the first embodiment.

FIG. 4 is a configuration diagram of an image reading apparatus according to a second embodiment of the present invention.

FIG. 5 is an operation flowchart of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Central processing unit (CPU) 2 Memory 3 A / D converter 4 Line sensor (CCD) 5, 15 Film original 6 Lens 7 Light source 8 Motor drive circuit 9 DC motor 10 Winding shaft 12 Speed detection circuit 13 Roller 30 Host computer 30a Storage medium

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication H04N 1/12 A

Claims (9)

[Claims] 1. A film document in which a plurality of image storage areas are set at predetermined intervals, and a plurality of marks are illuminated on at least one side in a short direction at a constant interval along a longitudinal direction. Illuminating means, photoelectrically converts light input through the film original,
An image reading unit that outputs an image signal by scanning in the main scanning direction; and a movement that relatively moves at least one of the film document and the image reading unit in a sub-scanning direction that is a direction intersecting with the main scanning direction. Means, a mark detecting means for detecting the mark moving with the relative movement in the sub-scanning direction by the moving means, and outputting a mark detection signal; and a time interval for the sub-scanning in an image storage area. , 1
An image reading device comprising: a scanning timing determining unit that determines based on the mark detection signal in the next preceding image storage area. 2. The image reading device according to claim 1, wherein the mark detection unit photoelectrically converts light from the mark and outputs the mark detection signal by scanning in a main scanning direction. An image reading apparatus, comprising: 3. An illumination means for illuminating a film document in which a plurality of image storage areas are set at predetermined intervals; and photoelectrically converting light input through the film document;
An image reading unit that outputs an image signal by scanning in a main scanning direction; and a moving unit that relatively moves at least one of the film document and the image reading unit in a sub-scanning direction that is a direction intersecting with the main scanning direction. Speed detecting means for detecting the speed of relative movement in the sub-scanning direction by the moving means; and making the time interval of the sub-scanning in the image storage area constant based on the speed detected by the speed detecting means. And a control means for controlling the moving means. 4. The image reading apparatus according to claim 1, wherein the mark is a perforation provided on the film document. 5. The image reading apparatus according to claim 1, wherein the mark is a density difference pattern displayed on the film document. 6. The image reading apparatus according to claim 1, wherein the power of the moving unit is a DC motor. 7. The image reading device according to claim 1, wherein the image reading unit is a color linear image sensor. 8. A film original in which a plurality of image storage areas are set at predetermined intervals and a plurality of marks are set on at least one side in the short direction at a constant interval along the longitudinal direction. Illuminating means, photoelectrically converts light input through the film original,
An image reading unit that outputs an image signal by scanning in the main scanning direction; and a movement that relatively moves at least one of the film document and the image reading unit in a sub-scanning direction that is a direction intersecting with the main scanning direction. Storage medium for storing a control procedure for an image reading apparatus, comprising: a mark detection unit that detects the mark moving in accordance with the relative movement in the sub-scanning direction by the movement unit and outputs a mark detection signal. Wherein the time interval of the sub-scanning in a certain image storage area is 1
A storage medium for storing a control procedure for an image reading apparatus, which stores a scan timing determination procedure which is determined based on the mark detection signal in a preceding image storage area. 9. An illuminating means for illuminating a film document in which a plurality of image storage areas are set at predetermined intervals; and photoelectrically converting light input through the film document;
An image reading unit that outputs an image signal by scanning in a main scanning direction; and a moving unit that relatively moves at least one of the film document and the image reading unit in a sub-scanning direction that is a direction intersecting with the main scanning direction. And a speed detecting means for detecting a speed of the relative movement in the sub-scanning direction by the moving means. A storage medium for storing a control procedure for the image reading apparatus, wherein the control procedure controls the moving means so as to make the time interval of the sub-scanning in the image storage area constant.