JPH05281697A - Film plate inspection device - Google Patents

Abstract

PURPOSE:To provide the compact film plate inspection device which can easily and surely make plate inspection. CONSTITUTION:The images of two sheets of original plate films are input by an image camera 36. The image data of two sheets of the original plate films input by the image camera 36 are respectively separately stored by an old plate memory 42 and a fresh plate memory 43. The image data of two sheets of the original film plates stored by the respective memories 42, 43 are compared by a comparison computing element 45 and the image data of the coincident image data is stored into a coincidence memory 48. The incoincident image data is stored in an incoincidence memory 49. The respective image data stored in these respective memories 48, 49 are outputted as synthesized image data in the colors varying with each of the storage means to one sheet of hard copy 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an original film for printing, by comparing an original film before correction with an original film after correction so that the pattern or characters of the original film after correction can be placed at predetermined positions. The present invention relates to a film plate inspection device that inspects whether or not the film is arranged as specified.

[0002]

2. Description of the Related Art Generally, when a master film for a four-color printing plate is prepared, a film obtained by color-separating a picture original or several transparent films of various materials such as a flat screen and letters for each color are used. 4) of yellow (Y), magenta (M), cyan (C), and smear (K) by adhering the same onto a light-shielding mask film, etc., and exposing the unexposed film several times to develop it. It is well known to make a plate original film (positive film).

On the other hand, when a mistake (typographical error or omission) is found in such an original film (old version), or when there is a change in designation, the transparent film on which various materials are stuck is corrected and re-read. The original film (new version) is newly created by exposing the unexposed film again.

Since such correction work is manual and complicated, mistakes or mistakes may be made in the portions other than the designated change portion, or the position of the material stuck to the transparent film may be shifted. There was something that happened.

Moreover, when the original film is modified from the old edition to the new edition, a new mistake may occur in the new edition, so that the new edition must be inspected. This plate inspection is not only a labor-intensive operation, but it may miss a new mistake, and especially if there is a mistake other than the correction, there is a tendency that the mistake is missed.

Therefore, conventionally, a plurality of original films for the same printed matter, for example, an old plate and a new plate are adjacent to each other.
By shooting with one TV camera, displaying the images on the TV monitor and comparing them, you can specify whether the pattern and characters of the new version are the same as those of the old version other than the modified parts, and specify the modified part There is a plate inspection device for facilitating confirmation as to whether or not the correction has been made (see JP-A-61-215550 and JP-A-63-228159).

The plate inspection apparatus disclosed in Japanese Patent Laid-Open No. 61-215550 has a function of compositely displaying old and new original films on a monitor TV in different colors, and the new and old plates are replaced or overlapped at regular intervals. And a tilting mechanism for displaying.

In the plate inspection apparatus disclosed in Japanese Patent Laid-Open No. 63-228159, the portions of the old and new original films to be inspected are defined by the addresses of the matrix, and the original film is photographed by the TV camera according to the addresses. This is a method of comparing image signals for each number of the old and new original films, storing the numbers of non-matching portions, and printing out the non-matching numbers.

[0009]

By the way, such a plate inspection apparatus, for example, the technique disclosed in Japanese Patent Laid-Open No. 61-215550 has a structure in which two television cameras have a part of two adjacent original films. Since it is configured to move manually to inspect each original film and inspect the whole original film,
There has been a problem that the plate inspector cannot leave the device body.

Further, in the technique disclosed in Japanese Patent Laid-Open No. 63-228159, the mismatched portion is displayed at the matrix address, and two images of the address are displayed again on the monitor TV in a state of being overlapped with each other so that the worker can change the address. Since the check is performed every time, the operator is restrained for a long time when there are many changes and when the changes are made over a wide range.

Further, in both plate inspection devices, the operator checks the image on the monitor TV, and if there is a mistake, the operator gives an instruction to the original film creator, or the operator makes a mistake. Since the original film is to be repaired, when there are many mistakes, there is a possibility of forgetting to correct some of the checked mistakes or losing the mistakes on the original film.

Further, the two plate inspection devices both mount two original films in a state of being adjacent to each other and take images with two TV cameras, respectively, and the original films are the screens of a normal monitor TV. The size of the original film is larger than the size of the original film, and when you try to project the entire original film on the monitor TV, you cannot check the details, so you can configure the TV camera to shoot a part of the original film, and use the TV camera or the original film. By making the movable structure, you can check the whole original film,
Further, there is a problem in that the apparatus itself becomes large in size because a certain focal length is required between the television camera and the original film to photograph the original film with the television camera.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a compact film plate inspection apparatus which enables easy and reliable plate inspection. is there.

[0014]

In order to achieve the object, the present invention provides an image camera for reading the images of two original films, and an image of the two original films read by the image camera. First and second storage means for respectively storing data separately, comparison means for comparing the image data of the two original films stored in the first and second storage means, and the comparison means The third and fourth storage means for separately storing the matched image data and the non-matched image data of the compared image data are different from the composite image data output from the third and fourth storage means. The gist of the present invention is to have a hard copy machine that combines and outputs one hard copy in color.

[0015]

According to this structure, the images of the two original films are read by the image camera, and the image data of the two original films read by the image camera are respectively read by the first and second storage means. Stored separately,
The image data of the two original films stored in the first and second storage means are compared by the comparison means, the image data in which the image data coincides is stored in the third storage means, and the image data inconsistent is determined in the first storage means. 4 is stored by the storage means.

Then, the respective image data stored in the third and fourth storage means are outputted to one hard copy as different color for each storage means as composite image data.

[0017]

Embodiments of the present invention will be described below with reference to FIGS.

1 to 5 show a film plate inspection apparatus of the present invention, FIG. 1 is a block diagram showing a schematic structure of the film plate inspection apparatus, and FIG. 2 is an explanatory view showing the appearance of the film plate inspection apparatus. 3 is an operation explanatory diagram of the document table, FIG. 4 is an operation explanatory diagram of the film transport device, and FIG. 5 is an explanatory diagram of input / output images.

In FIGS. 1 and 2, reference numeral 10 is a film plate inspection apparatus including a main body apparatus 20 to which a hard copy machine 11 and a TV monitor 12 are electrically connected.

The main body device 20 is arranged in the lower front portion of the main body device 20 and is described later with an original film 13 (old version) and an original film 14.
(New edition) is supported by a pin bar 16 in a state of being superposed on each other, and is supported by a storage section 21 for storing a plurality of document stands 17, 18, 19 and a pair of upper and lower slide rails 22 provided in the storage section 21. And a vacuum arm 23 for sucking and transporting the original films 13 and 14 set on the original table 17, and a scanner unit 30 for reading the original films 13 and 14 transported by the vacuum arm 23.
And a discharge tray 24 from which the original films 13 and 14 after being read by the scanner unit 30 are discharged.

The slide rail 22 is extendably extendable in the width direction of the main body device 20, and is set so that the document table 17 can be pulled out to the side of the main body device 20. Further, the slide rail 22 is, as shown in FIG.
When the original films 13 and 14 are set on the pin bar 16, the original mounting surface 17a is rotatably supported by the main body device 20 by a ratchet mechanism (not shown) so as to be in a substantially horizontal state.

The vacuum arm 23 is formed in a U-shape with its lower part open, and a plurality of suction nozzles 26 for individually sucking the original films 13, 14 by the suction action from the suction device 25 are provided on the upper side 23a thereof. 26 ... are attached. In addition, both lower end portions 2 of the vacuum arm 23
3b (shown on only one side in FIG. 2) is supported by a pair of left and right guide grooves 27 (shown on only one side in FIG. 2) formed in the main body device 20, and the guide groove 27 is transmitted by power transmission from the drive unit 28. Guide the vacuum arm 23 along.

At this time, as shown in FIG. 4, in the vacuum arm 23, the original film 13 or the original film 14 sucked by the suction nozzle 26 is transferred from the original table 17 to the scanner section 30 or from the scanner section 30 to the discharge tray 24. And carry. The suction device 25 and the drive unit 28 are controlled by the drive processing unit 29.

The scanner section 30 is attached to the main body device 20 and is guided by a reading surface 32 made of transparent glass or the like having a pin bar 31 and a vertically extending guide groove 33 formed in the main body device 20. Movable lighting 34
(For example, a fluorescent lamp), a vertically extending rail 35 provided inside the main body device 20, an image camera 36 provided on the rail 35, and a tilted mirror fixed to the lens 36a side of the image camera 36. 37 and 37. The illumination 34 and the image camera 36 are controlled by the drive processing unit 29 so that the motor 38,
Driven by 39. Further, the motors 38 and 39 can be integrated into one by a drive transmission system (not shown).

The image data of the original films 13 and 14 read by the image camera 36 is output to the processing section 40.

The processing section 40 processes the image data individually read by the image camera 36 from 8 bits to 10 bits.
A / D conversion circuit 41 for outputting as a digital signal of t,
Old memory 4 for storing image data of original film 13
2 (first storage means), a new edition memory 43 (second storage means) for storing image data of the original film 14, A / D
A changeover switch 4 for outputting the image data of the original film 13 and the original film 14 converted by the conversion circuit 41 to either the old edition memory 42 or the new edition memory 43.
4. Computation arithmetic unit 45 for comparing image data in old edition memory 42 and new edition memory 43, computation for controlling comparison arithmetic unit 45 and outputting composite image data to hard copy machine 11 or TV monitor 12 via changeover switch 46 Processing unit 4
7. A coincidence memory 48 (third storage means) for storing the coincident image data among the image data compared by the comparison arithmetic unit 45, and a non-coincidence image data among the image data compared by the comparison arithmetic unit 45. The non-coincidence memory 49 (fourth storage means) is provided.

The image data of the original films 13 and 14 are combined and output to the hard copy machine 11 and the TV monitor 12.

For example, the image data of the original films 13 and 14 are combined to synthesize the hard copy machine 11 or the TV monitor 12.
In the case of confirmation, the composite image data output from the matching memory 48 is displayed in black and the mismatching memory 49 is displayed as shown in FIG.
The composite image data output from is hard-outputted in two colors of red.

Further, for example, if the image data of the original film 13 is stored in magenta when it is stored in the old edition memory 42, and it is stored in cyan when the image data of the original film 14 is stored in the new edition memory 43, it is the same. Memory 4
In 8, composite image data is stored in purple (purple),
The non-coincidence memory 49 stores composite image data of two colors of magenta and cyan.

As a result, the composite image 12 'on the screen is displayed.
, The matched images of the original films 13 and 14 are output in purple, and the image data unique to the original film 13 among the unmatched image data of the original films 13 and 14 is output in magenta in the composite image 12 '. The image data specific to the film 14 is output in cyan in the composite image 12 '.

That is, on the composite image 12 ', "○" and "KU" are image data peculiar to the original film 13, "□".
Can be confirmed at a glance that the original image data of the original film 14 and all other images are the image data shared by both original films 13 and 14. Original film 14
Then, if it is changed to “□”, it is possible to easily confirm that the original film 14 was created in a state in which “K” was missing due to some mistake when the new version was created from the old version.

The original films 13 and 14 are generally black and white positives, which are the original plates of the printing plate for printing, which are formed in correspondence with the four color inks (Y, M, C, K) at the time of printing. It is a film, and there is a black exposed portion in a portion of the transparent film that requires ink in the printing plate. Therefore, the image camera 36 is for black and white, and outputs image data as black and white gradation data.

The black and white gradations of the two image data are
There are some errors depending on the exposure conditions of the original films 13 and 14 and the brightness at the time of reading by the image camera 36. Therefore, when comparing two image data,
Only the upper 4 bits or 5 bits of the image data of 8 bits to 10 bits are compared. With such a configuration, even if there are some gradation errors in the image data to be compared, they are ignored.
Of course, the comparison accuracy of how many bits from the top to compare can be appropriately changed depending on the inspection object.

The hard copy machine 11 is well known, and its model is not particularly limited. For example, a thermal transfer system, an ink jet system, a laser electrostatic system or the like can be used as long as it can output at least two colors of ink. Anything is fine. When the above-described three-color output is performed, one that can output with three or more colors of ink is used. In addition, the hard copy machine 11 uses the original film 1
It is preferable to use a paper having a size substantially the same as that of Nos. The TV monitor 12 is capable of color output.

In order to compare the old and new original films 13 and 14 with the above structure, first, the original table 17 is pulled out to the side of the main body device 20 by the extension of the slide rails 22 and 22, and then the original table 17 is pulled out. The manuscript table 17 is rotated so that the manuscript mounting surface 17a is substantially horizontal.

Next, the original films 13 and 14 are supported by the pin bar 16 in a state where the original placement surfaces 17a are overlapped with each other, and the original table 17 is rotated to the original state again, and then the slide rails 22 and The contraction of 22 causes the document table 17 to be positioned in the storage section 21.

At this time, the two sets of original films 13 and 14 set on the document table 17 are not limited to one set, but a plurality of sets (corresponding to Y, M, C, K). However, in the following description, it is assumed that a set of original films 13 and 14 is set on the original table 17. Further, the original plates 18 and 19 are for performing an interrupt process for setting another original film during the reading operation of the original films 13 and 14, and the original plates 13 and 14 set on the original plate 17 are not interrupted. When the reading is completed, it is possible to check whether or not the original film is set on the next manuscript table 18 or 19 and read the original film.

When the main body device 20 is driven by operating a main switch (not shown), the drive unit 28 is driven in conjunction with this drive to rotate the vacuum arm 23. Further, the suction device 25 is operated to suck the original film 14 by the suction force of the suction nozzle 26 and remove the original film 14 from the pin bar 16.

From this state, while the vacuum arm 23 is lifted up along the guide groove 27, the main body unit 20
The original film 14 is set on the pin bar 31 of the reading surface 32 by being displaced from the front side to the rear side (see the trajectory A in FIG. 4).

Further, when this set state is reached, the illumination 34 and the image camera 35 are displaced downward while being synchronized by the rotational driving of the motor 38 and the motor 39. At this time, the tilt mirror 37 is also displaced downward together with the image camera 35, and the original film 1 is illuminated by the illumination light of the illumination 34.
The image of the original film 14 that has passed through 4 and the mounting surface 32 is reflected by the tilt mirror 37 and then scanned by the image camera 36.

The image of the original film 14 read by the image camera 36 is stored as image data in the new edition memory 43 via the A / D conversion circuit 41 and the changeover switch 44.

Furthermore, when the illumination 34 and the image camera 35 are displaced upward while being synchronized with each other by the rotational driving of the motor 38 and the motor 39 in the opposite directions, and the original position (position shown in FIG. 2) is restored, While the original film 14 is removed from the pin bar 31 by the suction of the suction nozzle 26, the vacuum arm 23 is displaced from the rear side to the front side of the main body device 20 (see the locus B in FIG. 4) to discharge the tray 24.
The original film 14 is conveyed to the upper side, and the suction of the suction nozzle 26 is released on the discharge tray 24 so that the original film 14 is conveyed.
Is discharged.

From this state, this time, the original film 13 of the original table 17 is subjected to the same work processing as above. At this time, the image data of the original film 13 is stored in the old memory 42.

The old version memory 42 and the new version memory 43
The old and new image data stored separately in and are output to the comparison calculator 45, and the data in which the respective image data are matched by the comparison calculator 45 are not matched in the match memory 48. The data are input to the mismatch memory 49, respectively.

On the hard copy machine 11 or the TV monitor 12, the composite image data output from the matching memory 48 is displayed in black, and the composite image data output from the mismatch memory 49 is displayed in red. The colors displayed on the hard copy machine 11 or the TV monitor 12 can be freely set. For example, the comparison between the first edition and the reprint is black and red, and the comparison between the reprint and re-reprint is red and blue. As described above, it is possible to employ the color setting according to the situation to manage the business.

By repeating such operations, the original films set on the original plates 17, 18, and 19 are processed one after another. At this time, the manuscript film set on the manuscript table 17, 18, and 19 is loaded onto the hard copy machine 11 or the T
It may be stored in the old version memory 42 and the new version memory 43 or the matching memory 48 and the mismatching memory 49 before outputting to the V monitor 12, or the hard copy machine 11 or T.
It is also possible to read the next document table while outputting to the V monitor 12.

As described above, according to the film plate inspection apparatus of the present embodiment, different patterns, characters, and the like are combined and output in different colors between the old edition original film 13 and the new edition original film 14 and output. Therefore, the difference between the two original films 13 and 14 can be confirmed easily and surely, and it is possible to check without making a mistake when changing the original films 13 and 14.

Further, since the composite output can be performed by the hard copy machine 11, when a mistake is found in the paper (not shown) printed on the hard copy machine 11, it is directly written on the paper with a writing instrument. Since the mark can be added, it is possible to confirm that the check has been completed, and it is possible to reliably confirm the position of the mistake and prevent a new mistake when further correcting the original plate 14.

Then, the original films 13, 1 are placed on the document table 1.
After setting 4 and activating the image camera 36, the operator is not particularly restricted by the plate inspection device, and the output composite image or paper may be checked during the operator's idle time. , It is possible to reduce the time required for plate inspection.

Further, the image camera 3 is provided with a correction circuit.
The TV monitor 12 is provided with a correction function when there is a positional deviation between the two image data read in 6 and an expansion function.
It is also possible to enlarge and output the area specified in.

[0051]

As described above, in the film plate inspection apparatus of the present invention, the image camera for reading the images of the two original films, and the two original plates read by the image camera. First and second storage means for respectively storing the image data of the film, and comparison means for comparing the image data of the two original films stored in the first and second storage means, Third and fourth storage means for separately storing the matched image data and the mismatched image data of the image data compared by the comparison means, and the composite image output from the third and fourth storage means. Since it is equipped with a hard copy machine that combines data in different colors into a single hard copy and outputs it, it is possible to easily and reliably perform plate inspection, but with a compact film plate inspection device. Rukoto can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a film plate inspection apparatus of the present invention.

FIG. 2 is an explanatory view showing the external appearance of the film plate inspection apparatus.

FIG. 3 is a diagram for explaining the operation of the document table.

FIG. 4 is an operation explanatory view of the film transport device.

FIG. 5 is also an explanatory diagram of input / output images.

[Explanation of symbols]

 10 ... Film plate inspection device 11 ... Hard copy machine 13 ... Original film (old version) 14 ... Original film (new version) 36 ... Image camera 42 ... Old version memory (first storage means) 43 ... New version memory (second storage means) ) 45 ... Comparison arithmetic unit 48 ... Matching memory (third storing means) 49 ... Mismatching memory (fourth storing means)

Claims (1)

[Claims] 1. An image camera for reading images of two original films, and first and second storage means for separately storing image data of the two original films read by the image camera. And comparing means for comparing the image data of the two original films stored in the first and second storage means, and image data in which the image data compared by the comparing means are in agreement And third storage means for respectively storing and, and a hard copy for combining the composite image data output from the third and fourth storage means with different colors into one hard copy and outputting the hard copy. A film plate inspection apparatus, which is equipped with a machine.