JP2003085547A - Device, system and method for processing image, memory medium, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing device for constantly providing a high quality image to be read. SOLUTION: An image processing means 121 changes a method of processing an image (such as changing the mask pattern used in the edge emphasizing process as the image processing) for a read image obtained by a microfilm scanner 110 based on the information on the optical system (such as about the type or the zoom magnification of a projection lens, etc.), of the microfilm scanner 110.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, an image processing system, an image processing method used in an image reading apparatus or system such as a microfilm scanner, and a computer storing a program for implementing the same. The present invention relates to a readable storage medium and the program.

[0002]

2. Description of the Related Art Conventionally, for example, as an image reading apparatus,
There are microfilm scanners that read images on microfilm. A microfilm scanner generally includes an illumination lamp that illuminates the microfilm, a projection lens that projects the image on the microfilm onto a screen or an image reading sensor by the illumination lamp, and an appropriate amount of light that enters the projection lens. An optical system including a condenser projection lens for illuminating is equipped. The condenser projection lens is
It is configured so that it can be moved automatically in the optical axis direction or manually by an operator to a position where light suitable for the projection lens is incident.

By the way, the image projected on the screen or on the image reading sensor (projected image) has the property of becoming dark radially from the center of the image toward the outside, and the degree of this change depends on the type of projection lens or Depends on zoom factor. For this reason, for example, when a projection image is read by the image reading sensor, in the image reading operation, it is necessary to adjust the light amount according to the projection lens or image processing corresponding to the light amount adjustment.

Therefore, in the microfilm scanner,
The scanning direction is increased by increasing the input sensitivity from the center of the image to the outside with respect to the input signal (projected image signal) to the image reading sensor, for example, the line sensor (image sensor) in which the light receiving unit is formed on the line. The method of adjusting the amount of light is adopted. Further, as a method of adjusting the light amount in the sub-scanning direction, the voltage value supplied to the illumination lamp is set so that the illumination of the illumination lamp is dark at the image cutting start position, bright at the image center, and dark at the image cutting end position. A method of adjusting is adopted.

The microfilm scanner also executes, for example, filter processing for removing dust on the projected image and edge enhancement processing. These processes are
It is implemented by a hardware chip having a mask having a size of n pixels × n pixels (n: a fixed number) and a constant coefficient.

[0006]

However, in the conventional image reading apparatus such as the above-mentioned micro film scanner, the shape of the light amount distribution as shown in FIG. 7, which will be described later, is changed depending on the type of the projection lens or the zoom magnification. Because of the difference, it was not possible to adjust the light quantity appropriately. As a result,
There was unevenness (uneven density distribution). Further, as shown in FIG. 11A, which will be described later, the image reading level appears in a limited range depending on the type of the projection lens or the zoom magnification, but in the conventional image reading device, the entire image reading level is evenly distributed. As a result of the signal output, the gradations used have been reduced as a result. Furthermore, since the mask size in the dust removal filter processing and the edge enhancement processing was constant, for example, when the projection lens has a high magnification, the edge of the image becomes smooth,
Further, the dust part on the image (dust on the film) is also enlarged, so the effect is not sufficient.

Therefore, the present invention has been made to eliminate the above-mentioned drawbacks, and is capable of always providing a high-quality read image, an image processing apparatus, an image processing system, an image processing method, and to carry out the same. It is an object of the present invention to provide a computer-readable storage medium that stores the program, and the program. Specifically, the first purpose is to make it possible to read an image with high resolution. In addition to the first purpose, the second purpose is to further remove the dust on the image suitable for the image enlargement ratio to make the image clear.

[0008]

[Means for Solving the Problems] Under such a purpose,
A first invention is an image processing apparatus for reading an image through an optical system and performing arbitrary image processing on the read image, and an image processing method for the read image based on information about the optical system. It is characterized in that it is provided with an image processing means for changing.

A second invention is the same as the first invention,
The information about the optical system is characterized by including at least one of information about a type of a projection lens included in the optical system, a zoom magnification, and a position of the optical system.

A third invention is the same as the first invention,
The image processing includes edge enhancement processing, and the image processing means, based on information about the optical system, at least one of a mask size used in the edge enhancement processing, a mask pattern, and a multiplication coefficient for multiplying the mask pattern. It is characterized by changing.

A fourth invention is the same as the first invention,
The image processing includes dust processing for removing dust existing on the read image, and the image processing means, based on information about the optical system, a dust pattern for dust determination used in the dust processing, And at least one of the sizes is changed.

A fifth invention is the same as the first invention,
The image processing includes a light amount adjustment processing in the optical system.

A sixth invention is based on the fifth invention.
The light amount adjustment process includes a process of changing the exposure time of the image reading sensor included in the optical system.

A seventh invention is based on the first invention.
The image processing means is characterized in that the data width of the read image is converted and output.

An eighth aspect of the present invention is an image processing system in which a plurality of devices are communicably connected to each other, and at least one of the plurality of devices is a device according to any one of claims 1 to 7.
It is characterized by having the function of the image processing device described in any one of 1.

A ninth aspect of the present invention is an image processing method for reading an image through an optical system and subjecting the read image to arbitrary image processing, wherein the reading is performed based on information about the optical system. An image processing step for changing an image processing method for an image is included.

A tenth aspect of the present invention is an image processing method for reading a projected image of a microfilm through an optical system and subjecting the read image to arbitrary image processing, which is a projection included in the optical system. Lens type, zoom factor,
And a detection step of detecting at least one of the positions of the optical system, and an image processing step of changing the image processing method based on the detection result of the detection step.

In an eleventh aspect based on the tenth aspect, the image processing step includes a mask size and a mask pattern used in edge enhancement processing as the image processing.
And a step of changing at least one of multiplication coefficients by which the mask pattern is multiplied.

In a twelfth aspect based on the tenth aspect, the image processing step uses a dust pattern for determining dust on an image, which is used in dust removal filter processing as the image processing, and The method is characterized by including the step of changing at least one of the sizes.

A thirteenth invention is characterized in that, in the tenth invention, it includes an adjusting step for adjusting the brightness of the read image based on the detection result of the detecting step.

In a fourteenth aspect based on the thirteenth aspect, the adjusting step includes a step of changing the exposure time of the image reading sensor for obtaining the read image for each line or for every plurality of lines. To do.

In a fifteenth aspect based on the detection result of the detection step according to the tenth aspect, the first data width of the read image is set to a second data width smaller than the first data width. It is characterized by including an output step of converting to a width and outputting.

According to a sixteenth invention, a program for causing a computer to realize the function of the image processing apparatus according to any one of claims 1 to 7 or the function of the image processing system according to claim 8 can be read by a computer. It is characterized by being recorded in a storage medium.

A seventeenth invention is characterized in that a program for causing a computer to execute the processing steps of the image processing method according to any one of claims 9 to 15 is recorded in a computer-readable storage medium.

An eighteenth invention is a program for causing a computer to realize the function of the image processing apparatus according to any one of claims 1 to 7 or the function of the image processing system according to claim 8. And

A nineteenth invention is a program for causing a computer to execute the processing steps of the image processing method according to any one of claims 9 to 15.

Specifically, for example, when the present invention is applied to a microfilm scanner, the type of the projection lens or the zoom magnification is acquired when scanning the projection image of the microfilm, and the line is acquired based on the acquired information. The exposure time is changed line by line by the variable electronic shutter function that changes the accumulation time for each line, and the 12-bit pixel data acquired by scanning is converted into 8-bit pixel data and output. Further, based on the above-mentioned acquisition information, edge enhancement processing and dust removal filter processing (dust processing) are executed on the image data obtained by scanning.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The present invention is applied to, for example, an image processing system 100 as shown in FIG. As shown in FIG. 1, the image processing system 100 according to the present embodiment includes a microfilm scanner (MS) 110 and a host computer 120 that controls the image reading operation of the microfilm scanner (MS) 110. I'm out. That is, in the present embodiment, the present invention is applied to the microfilm scanner (MS) 110 and the host computer 1.
It is applied to an application and a scanner device driver that operate on the 20.

In particular, the image processing system 1 of this embodiment
The micro film scanner (MS) 110 acquires the type of the projection lens and the zoom magnification at the time of image scanning in the micro film scanner (MS) 110, changes the exposure time in the electronic shutter function for each line according to the acquired information, and further performs image scanning. It is configured to select the conversion table for converting the 12-bit pixel data acquired in step 1 into the 8-bit pixel data, and execute the data conversion by the conversion table. Further, the image processing system 10 according to the present embodiment
0 is configured to select the edge enhancement processing method and change the size of dust in the filter process for removing dust on the image according to the above-mentioned acquired information (projection lens type and zoom magnification). ing.

According to the image processing system 100 of this embodiment, the following effects can be obtained. -The resolution of the read image can be increased by adjusting the exposure time in the electronic shutter function according to the type of projection lens and zoom magnification. The mask can be changed by selecting the edge enhancement processing method according to the type of the projection lens and the zoom magnification, so that the quality of the read image can be improved. By changing the size of dust according to the type of projection lens and zoom magnification, it is possible to improve the performance of removing dust in the read image.

The image processing system 1 of the present embodiment will be described below.
00 will be specifically described.

<Structure of Image Processing System 100> The micro film scanner (MS) 110 includes a carrier 111.
The image information on the microfilm is acquired by scanning the projection image from the microfilm set on. Specifically, for example, as shown in FIG. 2, a microfilm scanner (MS) 1
Reference numeral 10 denotes a scanner unit 112 including an image sensor 113, a CPU 118, a scanner motor 117, a zoom magnification detection unit 114, an image memory 115, and a communication unit 11.
6, the illumination lamp 119, a work memory (not shown), and the like are connected to each other via a bus so that data can be exchanged between them.

The illumination lamp 119 illuminates the microfilm set on the carrier 111. The scanner unit 112 acquires image information on the microfilm by scanning the projected image of the microfilm with the image sensor 113. Scanner motor 1
17 operates the scanner unit 112. The image memory 115 digitizes the image information obtained by the image sensor 113 and stores it as image data. The zoom magnification detection unit 114 detects the zoom magnification of the projection lens, which will be described later. The CPU 118 controls the operation of the entire microfilm scanner (MS) 110 by executing a predetermined processing program using the work memory.

On the other hand, the host computer 120 has a so-called OS (operating system) 125, application software 124 operating on the OS 125, a scanner device driver 123 of the micro film scanner (MS) 110, a micro computer, as shown in FIG. A communication unit 122 that controls communication with the film scanner (MS) 110, a mass storage medium 126, and a CPU 121 that controls operation of the host computer 120 as a whole.
Is included.

The host computer 120 and the microfilm scanner (MS) 110 are connected by a communication cable 130 as shown in FIG. 1 to FIG. 3 above, and command communication and image data transmission are performed by an arbitrary communication protocol. Transfer or the like is performed.

<Image Reading Operation of Image Processing System 100> FIGS. 4 and 5 are flowcharts showing the image reading operation of the image processing system 100.
FIG. 4 shows the operation of the host computer 120, and FIG. 5 shows the operation of the microfilm scanner (MS) 110.

Step S201: When the user inputs an image reading operation instruction (scan start instruction) in the host computer 120 shown in FIG. 4, the scan start instruction is sent from the communication unit 122 of the host computer 120 to the microfilm. Scanner (MS) 1
10 is transmitted to the communication unit 116.

Step S221: See FIG. 5 In the microfilm scanner (MS) 110 which has received the scan start command, the CPU 118 starts the image reading operation control by the scan start command.

Step S222: Referring to FIG. 5, the zoom magnification detection unit 114 acquires information such as the type of the projection lens, zoom magnification, and other scanning conditions under the control of the CPU 118, and saves it in a work memory (not shown). To do.

An example of a method of detecting the zoom magnification of the projection lens in step S222 will be described. For example, in FIG.
As shown in (a), when the drive motor 305 of the projection lens 300 is driven, the gear 306 rotates and the belt 3
03 causes the gear 304 to rotate, and the gear 302 coaxial therewith also rotates. The projection lens 300 is composed of a zoom lens, and when the gear 301 is rotated, the projection lens group in the lens barrel operates to change the zoom magnification. The zoom magnification detection unit 114 has a reference position sensor, and detects the zoom magnification of the projection lens 300 by reading the rotation angle from the angle of the reference position sensor. The reading of the rotation angle is performed by the configuration as shown in FIGS. 6B and 6C. That is, the zoom magnification detection unit 114 includes the resistors 341 and the pads 342 arranged at equal intervals on the circumference of the substrate 340 that rotates together with the projection lens 300, and the contact points 343 are the pads 3 of the substrate 340.
42 is provided so as to correspond to 42, and the rotation angle is electrically detected by the configuration.

In this embodiment, the projection lens 300
The zoom magnification can be changed by configuring the zoom lens with a zoom lens. For example, instead of the zoom lens, it is possible to change the zoom magnification by replacing a plurality of projection lenses with different zoom magnifications. Good. In this case, the zoom magnification detection unit 114 detects the zoom magnification by detecting the type of the projection lens currently used. In addition, the drive motor 305 of the projection lens 300
Instead of using, the zoom magnification may be changed by manually moving the gear 301.

Step S223: The scanner motor 117 shown in FIG. 5 drives the scanner unit 112 under the control of the CPU 118. Specifically, the scanner motor 117 is composed of a pulse control motor, a DC motor, or the like. For example, the scanner motor 11
If 7 is a pulse-controlled motor, the scanner motor 117
Performs the position control by grasping the position of the image sensor 113 of the scanner unit 112 by the number of pulses.
When the scanner motor 117 is a DC motor, the scanner motor 117 grasps the position of the image sensor 113 of the scanner unit 112 by a sensor, a timer, etc., and performs the position control.

Steps S224 and S225: When the scanner motor 117 shown in FIG. 5 detects that the image sensor 113 has reached the image cutout start position (step S224) by the above-described position grasping, the image sensor 1
13 is driven (step S225), whereby the image data output from the image sensor 113 (image data on microfilm) is stored in the image memory 115.

Step S226, Step S227: When the scanner motor 117 shown in FIG. 5 detects that the image sensor 113 has reached the image cut-out end position by the above-mentioned position grasp (Step S226), the image sensor 1 is detected.
The driving of the scanner 13 is stopped (step S227), and the scanner unit 112 is moved to the home position. As a result, the image reading operation of the microfilm scanner (MS) 110 is completed.

Here, when the image reading operation is performed in the microfilm scanner (MS) 110 as described above, the light amount adjustment as described below is performed together with the image reading operation.

FIG. 7 shows a microfilm illuminating lamp 1
19 shows the light quantity distribution of the illumination lamp 119 when the illumination light is transmitted through the projection lens 300 and reaches the screen surface or the image sensor 113 of the scanner unit 112.

As shown in FIG. 7, the light quantity of the illumination lamp 119 reaching the screen surface or the image sensor 113 (specifically, the light receiving portion thereof) is the center (= optical axis center) X.
It has the property that it is brightest in O and becomes dark gradually from the center. This is the projection lens 30
This is because the light of the illumination lamp 119 that has passed through 0 spreads on the spherical surface. Image sensor 1 to which such light reaches
When the projection image (image on the microfilm) is read by 13, an input level difference occurs between the center and the outside, as shown in FIG. The spherical surface as shown in FIG. 8 differs depending on the type of the projection lens 119, the zoom magnification, or the position of a condenser projection lens (not shown). Therefore, a method for changing the speed of the variable electronic shutter is used as a method for adjusting the light amount in the sub-scanning direction, and an arbitrary method for adjusting the light amount in the main scanning direction is used for the pixel data output from the image sensor 113. A method of multiplying the coefficient is used.

Specifically, first, the "variable electronic shutter" for adjusting the light amount in the sub-scanning direction will be described.
For example, as shown in FIG. 9B, in the exposure method using the conventional image sensor, the exposure is started based on the horizontal synchronizing signal Hsync as shown in FIG. To finish. On the other hand, in the present embodiment, as shown in FIG. 9C, after the exposure of the previous line is completed,
The exposure time of the next line is changed by the interruption of the CPU 118. This is called a "variable electronic shutter".

Therefore, while the image sensor 113 is reading the image, the CPU 118 is operated as shown in FIG.
As shown in, an interrupt is generated after the exposure is finished, and the exposure time (shutter speed) of the next line is changed.
At this time, the CPU 118 determines the shutter speed data, for example, by referring to a table created in advance so that the exposure amount at the center XC in the main scanning direction shown in FIG. 7 has a constant value.

FIG. 10A shows an example of the change of the shutter speed by the CPU 118 with respect to the position in the sub-scanning direction. On the other hand, in the light amount adjustment in the main scanning direction, the CPU 118 sets the image data (PixIn (x)) output from the image sensor 113 in the main scanning direction as shown in FIG. The multiplication coefficient K (x) corresponding to the pixel position is multiplied (see (c) in the figure).

Note that the shutter speed data and the multiplication coefficient are held for each type of projection lens or zoom magnification.

The image data output from the image sensor 113 after the light amount is adjusted as described above, that is, the 12-bit image data is output as 8-bit image data. That is, the higher the magnification of the projection lens 300, the smaller the amount of light of the illumination lamp 119 projected on the screen or the image sensor 113 (darker). Therefore, the CPU 118 selects the type of the projection lens 119 obtained by the Soom magnification detection unit 114. Based on FIG.
12-bit image data is converted into 8-bit image data by a conversion table (conversion table corresponding to the zoom magnification of the projection lens 119) according to the graph shown in FIG.

Steps S202 to S205: See FIG. 4 above. On the other hand, in the host computer 120, the CPU 12
1 detects that image data (image data on microfilm) is stored in the image memory 115 of the microfilm scanner (MS) 110 by communicating with the microfilm scanner (MS) 110 via the communication unit 122. Then (step S <b> 202), information such as the type of the projection lens 300, the zoom magnification, and the scan condition obtained by the zoom magnification detection unit 114 of the microfilm scanner (MS) 110 is acquired and stored in the image memory 115. The captured image data are all captured (step S203 to step S205).

Steps S206 to S210: Referring to FIG. 4, the CPU 121 performs image correction processing including dust processing and the like on the image data acquired in step S205, in addition to light amount adjustment and edge enhancement (steps S206 to S206). S209), the processed image is output (step S2).
10).

Here, edge enhancement processing and dust processing will be described as an example of the image correction processing.

(Edge Enhancement Processing) For example, FIG.
In the case where the image that changes from black to white as shown in FIG. 4 is the image data to be processed, and the projection lens 300 is a low-magnification lens, as shown in FIG. Boundary of the projection lens 30
When 0 is a high-magnification lens, the edge changes smoothly as shown in FIG.

Here, a so-called Laplacian filter method is used as a method of edge enhancement processing. 13A and 13B show an example of a mask pattern by the Laplacian filter method. If the projection lens 300 is a low-magnification lens,
A 3 × 3 mask pattern as shown in FIG.
On the other hand, when the projection lens 300 is a high-magnification lens, a 5 × 5 mask pattern as shown in FIG. 13B is used.

As described above, in this embodiment, the size of the mask pattern used in the edge enhancement processing is changed according to the zoom magnification of the projection lens 300. This allows
When the projection lens 300 is a high-magnification lens, a mask pattern having a large size is used as the mask pattern used in the edge enhancement processing, and therefore, the edge can be smoothly enhanced and edge enhancement can be performed. Therefore, the quality of the output image can be improved.

Note that the size of the mask pattern used in the edge enhancement processing may be changed according to the resolution (corresponding to high resolution = high magnification lens, low resolution = low magnification lens). Further, the mask pattern and the size thereof may be the same or different depending on the type of the projection lens 300 or the zoom magnification.

(Dust processing) For example, as shown in FIG.
When dust is present on the image reading microfilm, the size of the dust appearing on the read image is determined by the projection lens 3
00 magnification or resolution. Therefore, in the present embodiment, for example, when the projection lens 300 has a low magnification or a low resolution, as shown in FIG. 15A, a pattern for determining dust is 3 pixels × 3 pixels of white pixels. If there is a black pixel in the white pixel pattern as a pattern, the black pixel is changed to a white pixel. In addition, the projection lens 3
When 00 is a high magnification or high resolution, as shown in FIG. 15B, the pattern for determining dust is 5
A white pixel pattern of pixels × 5 pixels is used, and when there is a black pixel in the white pixel pattern, the black pixel is changed to a white pixel. Further, when the projection lens 300 has a high magnification or a high resolution, as shown in FIG. 15B, the attention area for determining dust is 5 pixels × 5 pixels, and the white pixel pattern is included in the white pixel pattern. When the black pixel is independent, the black pixel is changed to the white pixel.

It should be noted that the determination of dust is not limited to the determination of the black area of the central 3 pixels × 3 pixels as shown in FIG. 15B as dust, and for example, any pixel in the black area can be determined. Even if is a white pixel, it is determined as dust. That is, it is not limited to the black / white pixel pattern in the area determined as dust.

As described above, in this embodiment, the pattern (size of dust) for determining dust is changed according to the zoom magnification or the resolution of the projection lens 300. This makes it possible to accurately remove dust on the image according to the lens magnification or resolution of the projection lens 300.

In the present embodiment, the image processing system 100 mainly performs the image reading process, but the present invention is not limited to this, and various processes other than the image reading process may be executed. You may

Further, for example, for each type of the projection lens 300 or each zoom magnification, the shutter speed table for adjusting the light amount and the multiplication coefficient data as described above are held in the large-capacity storage medium 126 of the host computer 120, and scanning is performed. Command to micro film scanner (M
S) 110 when issuing to the mass storage medium 12
The holding data of No. 6 is used for the micro film scanner (M
S) 110 may be sent. As a result, it is possible to reduce the amount of storage memory installed in the main body of the microfilm scanner (MS) 110.

Further, in the above-mentioned edge emphasis processing,
In addition to changing the mask pattern or mask size, the coefficient by which the mask pattern is multiplied may be changed.

Further, for example, as shown in FIG. 17, the structure of the microfilm scanner (MS) 110 has a condensing lens position detecting sensor 114 'instead of the zoom magnification detecting section 114 as shown in FIG. Like, automatically according to the type of the projection lens 300 or the zoom magnification,
Alternatively, the position of the condensing lens that can be moved manually is detected by the condensing position detecting sensor 114 ′, the detecting position is used instead of the type of the projection lens 300 or the zoom magnification, and based on the detecting position, as described above. Any process may be performed. In this case, the position detection is not limited to the condensing lens and may be detection of a change in any optical system.

Further, an object of the present invention is to supply a storage medium storing a program code of software for realizing the functions of the host and the terminal of this embodiment to a system or apparatus, and to supply the computer (or the computer of the system or apparatus). It is needless to say that this can be achieved by the CPU and MPU) reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the function of the present embodiment, and the storage medium storing the program code and the program code constitute the present invention. As a storage medium for supplying the program code, ROM, flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, C
A DR, a magnetic tape, a non-volatile memory card, or the like can be used. Further, not only the functions of the present embodiment are realized by executing the program code read by the computer, but also the OS or the like running on the computer actually performs the processing based on the instruction of the program code. It goes without saying that a case where a part or all of the above is performed and the processing realizes the functions of the present embodiment is also included. Further, after the program code read from the storage medium is written in the memory provided in the extended function board inserted in the computer or the extended function unit connected to the computer, the extended function is executed based on the instruction of the program code. The CPU provided on the board or function expansion unit performs some or all of the actual processing,
It goes without saying that the processing includes the case where the functions of the present embodiment are realized.

FIG. 18 shows the function 600 of the computer.
Is shown. As shown in FIG. 18, the computer function 600 includes a CPU 601 and a ROM 602.
RAM 603, keyboard controller (KBC) 605 of keyboard (KB) 609, CRT controller (CRTC) 606 of CRT display (CRT) 610 as a display unit, and hard disk (HD)
611 and a flexible disk (FD) 612 disk controller (DKC) 607, and a network 6
A network interface controller (NIC) 608 for connection with the
It is configured to be communicably connected to each other via.

The CPU 601 is a ROM 602 or HD.
By executing the software stored in 611 or the software supplied from FD612, each component connected to the system bus 604 is comprehensively controlled.
That is, the CPU 601 executes the processing program according to the predetermined processing sequence in the ROM 602 or the HD 61.
1 or by reading from FD612 and executing,
Control for realizing the operation in this embodiment is performed.

The RAM 603 functions as the main memory or work area of the CPU 601. KBC605
Controls instruction input from the KB 609 or a pointing device (not shown). CRTC606 is C
It controls the display of the RT 610. The DKC607 is a boot program, various applications, edit files,
It controls access to the HD 611 and the FD 612 that store a user file, a network management program, and a predetermined processing program according to the present embodiment. N
The IC 608 bidirectionally exchanges data with a device or system on the network 620.

[0072]

As described above, according to the present invention, information about the optical system (type of projection lens, zoom magnification,
Appropriate image processing can be performed on the read image based on the information such as the position of the optical system). Specifically, for example, for all projection lenses or all zoom magnifications, an appropriate method can be selected from a wide variety of image processing methods (image correction processing methods). It is possible to adjust the light amount, select the image data width, optimize image correction, or the like for each zoom magnification. Therefore, no matter what projection lens is used at any zoom magnification, the quality is always good,
Moreover, it is possible to provide a read image with high resolution, no dust, and proper exposure.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image processing system to which the present invention is applied.

FIG. 2 is a block diagram showing an internal configuration of a microfilm scanner of the image processing system.

FIG. 3 is a block diagram showing an internal configuration of a host computer of the image processing system.

FIG. 4 is a flow chart for explaining the operation of the host computer.

FIG. 5 is a flow chart for explaining the operation of the microfilm scanner.

FIG. 6 is a diagram for explaining a configuration of a projection lens and a magnification detection configuration of the projection lens of the microfilm scanner.

FIG. 7 is a diagram for explaining a configuration of an optical system of the microfilm scanner.

FIG. 8 is a diagram for explaining the amount of light projected on the screen or image sensor of the microfilm scanner.

FIG. 9 is a diagram for explaining a shutter speed (exposure time) when adjusting the light amount.

FIG. 10 is a diagram for explaining the light amount adjustment.

FIG. 11 is a diagram for explaining data conversion after the light amount adjustment.

FIG. 12 is a diagram for explaining edge enhancement processing in the host computer.

FIG. 13 is a diagram for explaining a mask pattern used in the edge enhancement processing.

FIG. 14 is a diagram for explaining dust processing in the host computer.

FIG. 15 is a diagram for explaining a pattern of dust used in the dust processing.

FIG. 16 is a block diagram showing another configuration of the microfilm scanner.

FIG. 17 is a diagram for explaining position detection of a condenser lens in the microfilm scanner.

FIG. 18 is a block diagram showing a configuration of a computer that reads a program for causing a computer to realize the functions of the image processing system from a computer-readable storage medium and executes the program.

[Explanation of symbols]

100 image processing system 110 micro film scanner 111 carrier 112 Scanner unit 113 image sensor 114 Zoom magnification detector 115 image memory 116 Communication unit 117 Scanner Motor 118 CPU 119 Lighting lamp 120 host computer 121 CPU 122 Communication unit 123 Scanner driver 124 applications 125 OS 126 mass storage medium 130 communication cable

Claims (19)

[Claims] 1. An image processing apparatus for reading an image through an optical system and performing arbitrary image processing on the read image, wherein an image processing method for the read image is provided based on information about the optical system. An image processing apparatus comprising image processing means for changing. 2. The information on the optical system includes at least one of information on a type of a projection lens included in the optical system, a zoom magnification, and a position of the optical system. Image processing device. 3. The image processing includes edge enhancement processing, and the image processing means multiplies a mask size, a mask pattern, and a mask pattern used in the edge enhancement processing based on information about the optical system. The image processing apparatus according to claim 1, wherein at least one of the coefficients is changed. 4. The dust processing for removing dust existing on the read image, wherein the image processing means determines dust used in the dust processing based on information about the optical system. The image processing apparatus according to claim 1, wherein at least one of the dust pattern and the size of the dust pattern is changed. 5. The image processing apparatus according to claim 1, wherein the image processing includes light amount adjustment processing in the optical system. 6. The image processing apparatus according to claim 5, wherein the light amount adjustment process includes a process of changing an exposure time of an image reading sensor included in the optical system. 7. The image processing apparatus according to claim 1, wherein the image processing means converts the data width of the read image and outputs the converted image. 8. An image processing system comprising a plurality of devices communicably connected to each other, wherein at least one of the plurality of devices is an image processing device according to any one of claims 1 to 7. An image processing system having the function of. 9. An image processing method for reading an image through an optical system and performing arbitrary image processing on the read image, the image processing being performed on the read image based on information about the optical system. An image processing method comprising an image processing step of changing the method. 10. An image processing method for reading a projection image of a microfilm through an optical system and performing arbitrary image processing on the read image, the type of projection lens included in the optical system, Image processing including a detection step of detecting at least one of a zoom magnification and a position of the optical system, and an image processing step of changing the image processing method based on a detection result of the detection step. Method. 11. The image processing step includes a step of changing at least one of a mask size, a mask pattern, and a multiplication coefficient for multiplying the mask pattern used in the edge enhancement processing as the image processing. The image processing method according to claim 10. 12. The image processing step includes a step of changing at least one of a dust pattern used to determine dust on an image and a size used in dust removal filter processing as the image processing. The image processing method according to claim 10, wherein: 13. The image processing method according to claim 10, further comprising an adjusting step of adjusting the brightness of the read image based on the detection result of the detecting step. 14. The image processing method according to claim 13, wherein the adjusting step includes a step of changing an exposure time of an image reading sensor for acquiring the read image for each line or for every plurality of lines. 15. An output step of converting the first data width of the read image into a second data width smaller than the first data width and outputting the converted second data width based on the detection result of the detection step. The image processing method according to claim 10, wherein: 16. A computer-readable storage medium recording a program for causing a computer to realize the function of the image processing apparatus according to claim 1 or the function of the image processing system according to claim 8. . 17. A computer-readable storage medium recording a program for causing a computer to execute the processing steps of the image processing method according to claim 9. 18. A program for causing a computer to realize the function of the image processing apparatus according to claim 1 or the function of the image processing system according to claim 8. 19. A program for causing a computer to execute the processing steps of the image processing method according to claim 9.