JPS58211155A - Picture scanning and recording method with retouching function - Google Patents

Abstract

PURPOSE:To eliminate the need for the retouching operation of a recording signal itself such as dot etching by making a scan on a retouch sheet whose processing value is set synchronously with an original picture, and adding obtained dot etching data to a corresponding color plate signal from the original picture. CONSTITUTION:The original picture A on an original picture drum 11 is scanned photoelectrically by a scanning head 12 and converted into respective color separation signals, which are corrected by an arithmetic circuit 13 and then recorded on a film (a) on a recording drum 15 by a recording head 14. A retouching device 2 is provided with a retouch drum 21 where the retouch sheet is mounted, scanning head 22, and adding and subtracting circuit 23. Then, retouch sheets B classified by the color plate signals of Y, M, C, and K are scanned synchronously with the scan on the original picture A and signals from the retouch sheets B are added to the output of the arithmetic circuit 13 by the adding and subtracting circuit 23 to output the sum to the recording head 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to image scanning and recording apparatuses such as image scanners and monochrome scanners, and more particularly to a method for performing retouching operations such as dot etching with such image scanning and recording apparatuses.

Generally, the Y required for color printing using a color scanner is
(yellow), 1M (magenta), C (cyan), and K (brick) when using all color separation films.There are limits to the color scanner calculation formulas used for image processing such as one-color correction and gradation correction. Therefore, it is difficult to obtain color separation films that can completely faithfully reproduce the original image, and it is often desired to reproduce the original image with slightly different tones and contrasts, and in such cases, the following calculation formula is used. The image may fall outside of the frame, and you may not be able to obtain the desired duplicate image.

In order to compensate for the limitations of the image processing function of scanners, work is still being carried out to correct one color tone, etc. by applying a reducing agent to a part or the entire surface of the desired color separation film and etching the dots. ing.

In the conventional dot etching process, the desired color separation film is first placed on a correction table made up of a light table, and then the pressure is reduced to the area to be dot etched.
], then rinse with water. After washing with water, use a magnifying glass to observe how the halftone dots decrease, and if necessary, repeat this operation many times to dot etching until the desired halftone density is achieved. There is.

If this is done with a halftone positive, the printed result means that the halftone dots become smaller, and if this is done with a halftone negative, the resulting halftone dots become larger.

Retouching work such as dot etching.

Even under the current situation where color scanners are widespread,
It still remains an indispensable work process, and was a complicated and time-consuming process even for experienced workers.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a new image scanning and recording method that can eliminate the need for retouching operations such as dot etching on the recording signal itself of the scanner. That is.

Using the color separation signals obtained by processing this invention original image under the same conditions as the 9-scanner, an image equivalent to the final printed matter is displayed as a monitor image on a color CRT display device, and the image for each color separation plate is displayed. The retouching sheets are sequentially displayed in a superimposed manner on the screen surface of the display device, and a felt-tip pen L# is used to display the dot gradation corresponding to the amount of dot etching at a desired location on each retouching sheet. The original image and the retouch sheet are simultaneously scanned with a color scanner without any pre-retouching means, and the desired dot etching is applied to the duplicate! #! The main feature is that both images are recorded, and the following description will be made with reference to the drawings shown as examples.

FIG. 1 shows a schematic diagram without detailed explanation of the present invention. An original image A on an original image drum 11) is photoelectrically scanned by a scanning head 12 in the order of scanning lines, red 0 (), green G
) & Aota), and is subjected to various corrections such as color correction and 1 gradation correction in the arithmetic circuit 18 to produce Y (yellow'), M (magenta), C (cyan) and K (
Each color signal for recording each color separation (black) is recorded on the film from the recording head 14 to the recording drum 15 for each color, one color at a time, two colors at the same time, or four colors at the same time.

The retouching device 2 includes a retouching drum 21 for mounting a retouching sheet, a scanning head 22 that can scan the retouching sheet on the retouching drum 21h in synchronization with the scanning of the original image A, and an arithmetic operation circuit that outputs the output from the scanning head 22. 1
An adder/subtracter circuit 28 is provided which adds signals for each color signal of MMCK mounted on the retouching drum 21. Signals from another retouch sheet (Q)B are output from the arithmetic circuit 18 by the adder/subtracter circuit 28. It looks like it will be added to.

Incidentally, the retouching sheet B is created using the Brilletouching means described below.

FIG. 2 schematically shows the pre-retouching means 8 comprising a monitor device 8a and a dot etching amount setting means 8b. The monitor device 8a in FIG.

For example, *Japanese Patent Publication No. 54-885, which the applicant previously applied for.
21 (Japanese Patent Application No. 47-84684) K, which is obtained by photoelectrically scanning a color original picture A with, for example, a Kawo TV camera 81a (red (2), green (G)).

Blue 03) Each color separation signal is stored in R, G, R buffer memory 82
The signals once written in and appropriately read out from the buffer memory 82 are first input to a simulation circuit 88, which is an electronic circuit having a configuration similar to that used in the color scanner 1. This simulation circuit 38
The input color separation signals B, G, and R are processed with various corrections performed in general color scanners, such as color correction 1 gradation correction, yellow (Y), magenta M, cyan 0,
There is a circuit t for converting color signals for four-color separation of black ■, and each color signal Y1M, C is output from this circuit 38.
, is once written into the YMCK buffer memory 84. Next, each color plate signal Y, M, C read out from the computer memory 84 is given a printing strip V by a display control circuit 85.
1'B, G, and R signals while simulating +, and as a result, the color CRT display device 36 displays a color image @ (monitor 1 It is designed to display A).

The dot etching amount setting means 8b is configured such that the output of the TV left camera 1b, which is different from the TV right camera 1a, is input to the display control circuit 85, and the operator can select the retouching sheet B such as a transparent sheet or white paper. The retouching is performed by superimposing the image signal obtained by scanning the retouched image drawn on the retouched image on the image signal obtained by scanning the original image.

To explain this Briretouching operation in more detail, first, as mentioned above, the monitor image A' is displayed on the color CRT display device 36, and then the image of the retouch sheet B is displayed on the color CRT display device 86 using the TV camera j'llb. First, K is displayed superimposed on picture A, as shown in Figure 8.
Make markings to align original picture A and retouch sheet B. For example, how many points M to the left of monitor picture A'?
Marks (m) and (m) are attached to the positions of the retouch sheet BJ: corresponding to the lower right side point M. Next, while looking at the monitor image on the color CRT display device 36, the operator uses a felt-tip pen or the like to apply a density gradation corresponding to the desired amount of dot etching to the desired portion of the retouch area (Y, M, etc.). Brillette touch is applied to each color separately for C and C (section C in Figure 8). At this time, it is difficult to decide whether to dot etching in the direction of decreasing halftone dot haze, or in the direction of increasing it.

It can be specified separately using a key 87, a switch, or the like. In addition, the maximum dot etch amount at this time is measured automatically or manually and recorded on the retouch sheet Bh (8th drawing section), or recorded on a separate memory device, and as described later, it is This is used as data when recording a duplicate image with the desired dot etching applied.

Of course, in this case, the TV cameras 8ta and Rlb have the same magnification. Further, the image signal of the original image A obtained by scanning with the TV power j931a is recorded in the BGR buffer memory 32 as described above.

It is more practical and more economical to switch and use the TV right camera 1a as the TV right camera 1b after the recording is completed.

The retouch sheet 1-B created for each color separation as described above is sequentially applied to the retouch drum 21 of the color scanner and scanned by the color scanner each time each color separation is recorded. At step 28, the dot etching data obtained from the retouch sheet B17) image is superimposed on each color signal from the arithmetic circuit 13 to perform predetermined dot etching. In this case, the alignment of the upper part of the original image drum 11 (ul A) with the retouching sheet B can be done by visual inspection by the operator, and the pasting of the retouching sheet B in the main scanning direction can be adjusted according to the situation. and is aligned at the retouching head 220 position in the sub-scanning direction.

As previously disclosed by the applicant of the present application as Japanese Patent Application No. 46-62481 (Japanese Patent Publication No. 52-18601).

When creating all color separation plates for two colors or four colors simultaneously in the circumferential direction of the recording drum, the retouching drum 21 and the scanning head 22 are arranged in two or four sets in parallel, and the This can be carried out by superimposing the dot etching data on each color plate signal from the arithmetic circuit 18 in synchronization with the timing for recording each color separation plate.

In addition, even in such a case, the amount of dot etching is applied to retouch sheet B by coloring it with a density gradation of 1, for example, a character, rather than applying a gray density gradation as described above. If you do this, retouch drum Fi1
It is also possible to have one. However, in this case, a color separation mechanism is also required in the scanning head on the retouching drum side.

Furthermore, when dot etching data is superimposed on the color plate signal, whether to dot etching in the direction of decreasing or increasing the halftone dot area is determined by dot etching around the area to be dot etched, for example by dot etching amount. This can be done by any appropriate method, such as by coloring it with a specified color.

Even more actual reproduction images! ! By scanning the retouching sheet B in advance and making the maximum output of the retouching scanning head 22 match the maximum dot etching amount recorded on the retouching sheet B, printing can be performed. It is possible to accurately match the amount of dot etching in the retouching stage with the amount of dot etching when actually dot etching is performed using a color skinner.

As explained above, the present invention simulates the original image under the same conditions as a color scanner and performs Brilette touch based on the monitor image displayed on a color CRT display device, and by the Brilette touch, the desired retouching sheet is The dot etching data obtained by recording the amount of dot etching that you want to do on a portion and scanning the retouch sheet in synchronization with the photoelectric scanning of the original image when recording the duplicate image using a curry scanner is used to print out the dot etching data for each color separation plate recording. Since retouching is performed by adding to the plate signal, retouching operations such as dot etching can be performed extremely easily and accurately.

In the above description, the case where the present invention is applied to a color scanner has been described, but it goes without saying that the invention can be easily applied to a monochrome scanner as well.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing the principle of the invention, FIG. 2 is a schematic diagram showing the procedure of Brilette touching, and FIG. 8 is an explanatory diagram showing the relationship between the original image and the retouching sheet. In the figure A...Original image A...Monitor image B...Retouch sheet l...Color scanner 86...Color CRT display device

Claims (2)

[Claims] (1) The original image is simulated under the same conditions as a single-image scanning recording device and displayed as a monitor image on the display device, while the required parts of the retouch sheet displayed on the display device are superimposed on the monitor image. The required amount of processing is set in advance using a recording means capable of imparting cold gradations, the retouching sheet with the set amount of processing is scanned in synchronization with the original image, and the dot etching data from the retouching sheet is transferred to the dot etching data from the original image. An image scanning and recording method having a retouching function characterized by adding and superimposing a corresponding color plate signal. (2) Multiple retouching sheets are photoelectronically scanned in parallel in synchronization with the original image, and the dot etching data from each retouching sheet is selectively added and superimposed with the corresponding color plate signal. An image scanning and recording method having retouching capability as claimed in claim 1.