JPS6057842A - Inspecting device for film for photoengraving process - Google Patents

Abstract

PURPOSE:To shorten the operation time of the correction and proofreading of a new version film and to prevent errors in correction and proofreading calculating and displaying the difference between image data of an old version film and the new version film. CONSTITUTION:The image data of the old version film is stored in one of two one-page storage areas of a video memory device through an image input device, and the image data of the new version film stored in the other one-page area; and the difference between the image data of the old and new version films is calculated by an information processor such as a computer and dispalyed. Then, the image data of the new version film is corrected and proofread accurately and speedily on the basis of the difference. Thus, the difference between both films is calculated and displayed to shorten the operation time of the correction, proofreading, etc., of the new version film. Further, a finished state is displayed as a color image by the contents of the 1-page area, and the difference part between the image data of the new and old version films is displayed as a color image by the contents of the 0-page area, so errors in corrections and proofreading are prevented.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a film inspection device for photolithography, and in particular,
This invention relates to a photolithographic film inspection device using a computer.

Traditionally, film inspection has been carried out in the final process of photoengraving, but photoengraving film requires one inspection for each printing color.
Because each film is required, it is divided into several films. To do this, the plate inspector must check while imagining the overlap of colors in his or her head, a task that requires experience and a great deal of attentiveness, and plate inspection errors occur frequently. is the current situation.

■ The present invention has been made in view of the above-mentioned current situation, and its purpose is to reduce the work time required for corrections, proofreading, etc. of the new version film by identifying and displaying the differences in image data between the old version film and the new version film. It is an object of the present invention to provide a photolithography film inspection device which can shorten the time required and prevent correction errors, proofreading errors, etc.

The above and other objects and novel features of the present invention will become apparent from the description of the specification and the accompanying drawings.

Summary of the Invention Among the inventions disclosed in this application, a summary of typical inventions is as follows.

In other words, the image data of the old film is stored in the storage area for one page (hereinafter referred to as the area) of the image memory device, which has a storage capacity of one page for two pages, and the image data of the new film is stored in the other area for one page. The image data of the previous version of the film is inputted and stored using an image input device, and the difference between the image data of the old version of the film and the image data of the new version of the film is determined and displayed using an information processing device such as a computer. This allows work such as correction and proofreading of image data of a new version of film to be performed accurately and quickly.

staff room The configuration of the present invention will be explained together with examples.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention.

In FIG. 1, 1 is an image input device, and a conventionally known device is used. For example, as shown in FIG. 2, there is a film support 101 on which a glass plate IB having film positioning pins IB+ is placed on a light diffusing plate LA, a film IC is placed on the film support 101, and a light source is provided. It consists of a photoelectric conversion device 102, such as a video camera, which converts a perspective image on the film IC, which is generated when the light from ID is irradiated from the light diffusion plate IA side, into a video signal. Reference numeral 2 denotes an image memory device having a storage capacity of two pages and capable of storing image data of a perspective image of an old edition film and a perspective image of a new edition film. Reference numeral 3 denotes an information processing device comprising a computer, etc., for performing processes such as determining the differences between the old and new versions of the film, and performing corrections and proofreading. 4 is a display device such as a cathode ray tube (CRT) for displaying image data, and 5 is a control device for controlling image data display and controlling various parts.

Next, the operation of this embodiment will be explained.

FIG. 3 is a flowchart I- for explaining the control operation of this embodiment.

First, as shown in FIG.
” Open the page area and make it ready for writing. Next, overlap the yellow version of the positive film on the old version of the black positive film and attach it to the positioning pin IB on the glass plate IB of the film 11 support stand 101. Then, light is emitted from the light source ID, a transparent image formed by the transmitted light is converted into a blue video signal by the photoelectric conversion device 102, and this blue video signal (hereinafter referred to as the B signal) is converted into an analog signal.・Digital conversion (hereinafter referred to as A
/D conversion) of the image memory device 2.
Store in n page area. Similarly, a green video signal (hereinafter referred to as G signal) was generated using the old version of Sumi positive film and the magenta version of positive film.
Store in page area. In addition, the red video signal (
The R signal (hereinafter referred to as R signal) is stored in the II OII page area in the same manner as described above.

Next, just as the fluoroscopic image of the old version of the film was changed into B, G, and R signals and stored in the II and OII page areas of the image memory device 2, the fluoroscopic image of the new version of the film is stored in the image memory device 2. rr I I+B signal in page area,
Convert to G signal and R signal and store.

Here, for example, the pixel density of each of the G, B, and R signals is expressed in steps of 0 to 255, and the data is black when the data is II OII, and white when the data is II 255 IT.

That is, the memory areas for each of the G, B, and R signals are divided into predetermined sections, and addresses are assigned to each section.

II OH page area of the image memory device 2 and
The B signal, G signal, and 1 (among the signals, data at the same location of the same color signal are sequentially read out from the old version and the new version of the film stored in the '1'' page area, and the information processing device 3
The data is sent to the system to determine whether the two data are the same or not. And if the contents of both data are the same,
"I""Data content of the corresponding address in the page area"
o” Store (copy) to the corresponding address in the page area.

Also, if the contents of both data are not the same,
Q Set the data at the corresponding address in the IT page area to the maximum value (for example, 255; white). This comparison operation is repeated in sequence.

That is, when the data comparison operation for address 1 of each signal area of the image memory device 2 is completed, the command signal n+1 (n=0.1, 2, 3, . . .
... n) is generated.

By performing such processing, the R, G, and B images of the new version of the film are stored in the 1'' page area.

For example, when displayed on a display device 4 such as a color cathode ray tube, it can be viewed as a color image. Also, the ``O''''O'' page area version film and the old version film are compared, and the parts where the content is the same in both are stored as a white signal, and the parts where the content is different in both are stored in the new version. Since the signal of the film is stored, when it is displayed on the display device 4, only the difference in content between the old and new versions of the film is displayed as a color image on a white background. can be viewed as a color image.

Therefore, the plate inspector can check the finished state with a color image based on the contents of the " ] " page area, and check the contents of the yOrr page area to see if the requested corrections for the old version of the film have been corrected. can do. Furthermore, it is possible to check whether or not there are any changes other than the correction requested portion based on the contents of the LL 011 page area.

As explained above, the following effects can be obtained by the novel technical means disclosed by the present application.

(1) By displaying the difference in image data between the old version film and the new version film, it is possible to shorten the work time for corrections, proofreading, etc. of the new version film.

(2) The content of the "1" page area is used to display the "secondary state" in color images, and the content of the LL OIT page area is used to display the differences between the image data of the new and old versions of the film in color images. , corrected mistake.

Calibration errors can be prevented.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof. For example, the image memory device may also serve as a memory provided in an information processing device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, FIG. 2 is a diagram showing a specific configuration of the image input device shown in FIG. 1, and FIG. 3 is a diagram showing the present embodiment. It is a figure for explaining the control operation of. ■...Image input device, 2...Image memory device, 3
... Information processing device, 4... Display device, 5... Control device. Agent Patent Attorney Shuki Akita

Claims (1)

[Claims] (1) An image input device for inputting image information of a photolithographic film, an image memory device having a storage capacity of two pages for storing image data input by the image input device, and the image memory device means for storing the image data of the old version of the photolithographic film in a recording area of one page of the image forming apparatus, and the image data of the new version of the photolithographic film in the recording area of another one page; A photoengraving device comprising a processing means for storing difference data between image data of an old film and a new film stored in the image memory, and a display means for displaying an output of the processing means. film inspection device.