JPS5978350A - Plate making system for video picture - Google Patents

Abstract

PURPOSE:To realize speedy, secure plate making of high quality by correcting and storing the picture signal of a desired video source recorded on a master video disc, and interpolating it on on-line basis for the plate making. CONSTITUTION:The picture signal of a desired picture source selected by an input switching part 30 is recorded by a master video disc device and its reproduced output is made into a high-qualiy picture signal through a picture quality improving part 60 which performs time-difference correction, noise elimination, contour emphasizing, etc. This picture signal is converted into respective color signals with excellent luminance, etc., by an RGB decoder and then stored temporarily in a frame memory 80 through a switcher 53 adding an external color signal, a gradation correcting part 72, etc. Then an on-line scanning line interpolating part 81 performs two-dimensional interpolation, etc., to obtain a signal for plate making, performing the speedy, secure plate making of high-quality.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for recording a desired screen from a continuous video signal recorded on a videotape or the like onto a -H mask video disc, and then producing a high-quality image on a color film and a color film. This invention relates to a video image prepress system that creates disassembled plates online.

Due to the recent remarkable development and spread of video technology and changes in publishing trends due to the diversification of printed materials, it is now possible to use a desired screen of continuous video information recorded on video tapes, etc. for photographs, printed manuscripts, etc. If you can do this, you will have many advantages compared to the traditional method where photographers use still cameras to shoot film.

This is because it is free from constraints such as low brightness, and at the same time, various needs can be expected to develop. For example, a photograph or a printing plate can be created directly from video information recorded on a videotape, or a telecine device can be used to convert a movie film into a television video signal or R (red), G (green), B (
Blue) It becomes possible to create ID numbers and create printing plates directly from the paper, making it possible to publish at a lower cost and more quickly than with conventional methods.

However, when using conventional video information recorded on a videotape as a printing document, the videotape is first set in a playback device and continuous video is displayed on a CRT (cathode ray tube) using slow or stop playback. After a film original is created by photographing a desired image with a still camera while observing the screen, color separation plates are created from the film original using a plate making device such as a color scanner. It used to be that the quality of a printed document depended on the resolution of the television image. However, color television broadcasting in Japan uses the N1'SC system, and one screen (one frame) is formed by 525 scanning lines, regardless of the size of the television image.

Therefore, the image quality of one frame is poor compared to general color film in terms of resolution, etc. In addition, in the method of selecting a desired screen from a continuous video image and photographing it with a still camera, the color temperature of C.
Due to the mismatch between the coloring characteristics and brightness range of the Rhyme BJJJ source material and the color temperature 2 coloring material characteristics and density range of the color film, a special color temperature conversion filter was inserted in the front of the camera, and the hue and brightness range of the color monitor was Even if it is necessary to adjust contrast, etc. (there are problems such as 1)), it is not always possible to obtain a satisfactory color tone with these corrections alone.

Furthermore, the number of television scanning lines is thick and affects the quality of resolution (1-1), and when an image projected on a CRT is accurately focused and photographed with a camera, these scanning lines will be noticeable as horizontal stripes on the film. The scanning lines recorded on this film cause moiré fringes during the plate-making process, so a photographic technique that erases the scanning lines is required.For example, a continuous image with little movement can be To obtain images, the effects of scanning lines are usually erased by exposing several frames on a single film while playing back or slowing down, but the effects of the scanning lines cannot be completely erased. The focus of the photograph is slightly shifted by 1 degree.However, with this method, it is difficult to accurately photograph both sides of the image, and the screen becomes blurry.For this reason, To obtain the desired image from a continuous video with large movements, it may be necessary to stop playback.Usually 3/3
With the 4-inch V'l'R, only one field of video signal is played back in the case of stop playback, and the vertical resolution of the image projected on the (l(?r) is halved, making it even more difficult than in the case of A photographic technique of scanning line erasure is required.In such cases, the resolution of color film is generally (3
) book/ Since it was around 111111, we adopted a shooting method that took advantage of the limitations of color film resolution (・
Ru. That is, if there is a failure to scan the desired image on Cf(jr)
The scanning lines are erased by reducing the size of the image so that it cannot be distinguished. Therefore, since video images, which are inherently poorly imaged, are shot on color film in extremely small sizes, the final print size is limited to A644j to A7, and any size larger than that will have no commercial value. . Furthermore, there is also the drawback that workability is significantly degraded due to page layout and enlarged plate making of small-sized color images.

As a television image plate-making apparatus for solving the above-mentioned problems, for example, a video tape recorder that records a television video signal is used to collect a video number corresponding to a desired frame, and then outputs this video signal. A printing plate is produced by converting the three primary color signals into three primary color information signals, converting the three primary color signals into printing image signals, and supplying this l:I printing image signal to a plate-making scanner. A memory unit, means for sequentially outputting signals from the memory in synchronization with the scanning speed button of the scanner, means for converting ~TδC (No. magenta).

The means for converting into C (cyan) and BK (black) signals and supplying them to the scanner are all configured online. This device has solved the above-mentioned problems quite effectively, but since the device configuration is all line-of-sight, if you repeat slow playback, stop playback, etc. of the video tape recorder to obtain the desired screen, the video tape recorder The lifespan of
Furthermore, due to the friction caused by the playback head of the video tape recorder,
It has the disadvantage of damaging valuable customer video tapes. Furthermore, since the entire configuration of this device is online, videotape collection work and signal conversion processing work cannot be performed independently, which poses problems in terms of workability and efficiency. There is no mention of the need for a time base corrector that electrically corrects jitter and dropouts in the image, a noise reducer that removes noise other than the image signal, a date corrector that enhances the contours of the image, etc. There are also problems in terms of quality.

Accordingly, it is an object of the present invention to provide a video image prepress system that solves the above-mentioned inconveniences and problems.

This invention will be explained below.

This invention covers 1) video tapes, video discs, films, slides, telops, television radio waves, and TV
A video signal from a camera, etc. is input through the input switching section, and the desired II! 2) an input section that records IlI# on a mask video disk while watching it on a monitor TV; and 2) an input section that is connected offline or online to the mask video disk of the input section and records the time between each scanning line signal of the reproduced video key code of the master video disk. Image quality improvement unit that performs focus correction, noise removal, and edge enhancement processing, and separation of luminance signals and chroma signals suitable for improving image quality) JA (Charac
terand Pattern Telephone
Access Information System
A correction unit inputs RGB signals from em), etc., and performs correction processing for dark colors and gradations by independently adjusting these open signals; 3) an image signal conversion processing section comprising a display section for displaying the signal on a monitor via a screen synthesizer; and a storage section for digitizing and storing the corrected open signal; 3) an image signal conversion processing section; Connect online and read out the I (UB double signal, scanning line information of odd field and scanning line information of even field) stored in the floppy disk in which the output number 1J of the image signal conversion processing section is written, and the information in between. A color film production system that produces a color film after interpolation by two-dimensional interpolation, or a color scanner or layout output system that produces surface-quality color separation plates is provided.

FIG. 1 is a block diagram showing one embodiment of the present invention,
The input medium of the human-powered device may be any medium as long as it generates a video signal (videotape 11. video disk (or floppy disk) 12. film (or slide)
telop) 13. Television radio waves 14 can be considered.

The videotape 11 and video disc 12 are not only recordings of one screen (but can also include composites of several screens), and these input media 11 to 14
are respectively VTR and (video tape recorder) 21
, VDR (video disc recorder) 22. The video signal is reproduced by the telecine equipment z and 'i'v receiver rows and transmitted to the input switching network. Further, the video information (for example, NTSC system) captured by the 1゛V camera school may be directly transmitted to the input switching section.

These input image information input between the input switching units are selected by operating the operation console blade, and the selected input media 11 to
Images 14 and 25 are displayed on a CRT monitor 31.

Then, by operating the console 50 without looking at the screen displayed on the CRT monitor 31, the operator transfers the image information of the desired screen to the video disk recorder 3 for each scene.
2 to record on the master video disk. in this case,
If a video switcher is used on the input switching section side, it is possible to create a composite image of any manual media. In this way, the image information recorded on the mask video disk 33 in ■R32 via the manual switching section 30 is transferred to Vl)R3 during plate making.
2, the playback operation is controlled by the console 50.

The image signal of the masked video disc 33 reproduced by the VDR 32 is transmitted to the internal improvement Bus 60, where image quality improvement processing is performed. This image improvement section 60 is composed of a time base collector 61, a noise reducer 62, and a detail collector 63.
・Ru. The time base corrector 61 is used to correct the temporal deviation between video signal scanning lines, which is usually called jitter. This is because differences in the starting point and the number of sample pixels will be ignored. Noise reducer 62 suppresses various noises and improves image quality1
- If the image quality recorded on the original 3/4 inch wide videotape 11 provided by the customer has deteriorated due to noise, etc., or if the video editing department or the re-recorded videotape 33 This is to improve image quality that has deteriorated due to noise generated in the signal conversion system etc. during playback.

The detail corrector 63 emphasizes the points of change in the horizontal and vertical directions of the image and performs edge enhancement processing to make the image clear.

This reproduction operation can be performed online or offline. Then, the image quality improved by the image quality improvement processing 1v is transferred to the old decoder 5.
2 and from the N'J'SC signal, R (red), G (green)
, B (blue) *jB signal. This old decoder 52 uses a comb filter [luminance signal Y and color r]
Since the signal C is separated, it is possible to obtain an image signal with excellent resolution and two color tones, and the separated tGH signal is input to the gradation correction section 72 via the switcher & frame memory 84, and After passing through the screen synthesizer 70, it can be observed on the screen 71A of the C) LT monitor 71. The switcher 53 also includes a TV camera (H
GB system), gear buten system (1 (G13 signal),
HGB signals are input from microcomputers, office computers, etc., and these RGB signals can be taken in by switching the switcher. That is, the digital GB signal taken in via the switcher 53 is digitized by the AD converter 83, stored in the frame memory 84, converted into analog by the DA converter 85, and then sent to the screen synthesizer 70 and the gradation correction section. Sent to 72. Further, a corrector and display 55 that are controlled between operating cars are connected to the gradation correction section 72, and a switcher 5
For each of the Moe B signals manually input from 3, it is possible to manually correct the contrast, shift the parallelism of 2 levels, adjust the gradation of the light part or the shadow part, etc., and the correction results are sent to the screen synthesizer 70. The images are displayed on the CRT monitor 71 at any time. Therefore, from the corrector and display 55, the stationary +
By adjusting the cursor signal to the 1tIl image, the video level at any point of the still image group displayed on the CR'l' monitor 71K can be determined as a comparison value with respect to the Video No. 116 reference value of 0.7 V. , numerical values can be displayed on the display section of the corrector and display 55. In addition, the conditions for applying gradation correction to each input RQB @ number and the set position information of the correction device and the gradation correction knob of the display 550 are stored in an external memory via the external memory recording/reproducing device 56. (for example, magnetic tape, paper tape) 57.

In this way, the R, G, and B still image signals that have undergone the necessary corrections by the corrector and display device 55 are displayed on the CRT monitor 71 via the screen synthesizer 70, and when the correction is completed, the corrections are made on the console 50. By pressing the completion instruction switch, the R, G,
For each B signal, [4,' is stored sequentially in the frame memory 80, and recording of the 1 (GB signal) for one screen is completed.

In addition, the display on the CR'l' monitor 71 first displays the entire screen as an image before gradation correction, and then displays the image after gradation correction on the entire screen by switching the screen synthesizer 70. 9 screens may be used, and the screen can be switched arbitrarily. In addition, as shown in the figure (when one screen is divided into two, and -J is set as the image area 71A before correction and the other is set as the image area 71B after correction, the dividing line 71C of the screen is divided into two parts by the screen synthesizer 70. It can be set to any position using the provided knobs, etc., and setting 1i171c to the left and right screen edges is the same as switching the screen.

J(,
, G, and B are sent to the scanning line interpolation unit 81.The signals for one scanning line transferred to the scanning line interpolation unit 81 are such that the scanning lines of odd and even fields have the lowest number. The scanning method is switched from the interlaced method to the sequential method, and this switching prevents bearing, which is a drawback of the interlaced method, and prevents deterioration of image quality. The number of scanning line signals transferred to the scanning line interpolation section 81 is 484 signals, which is the number of scanning lines of television (NTSC system), which is 525, minus the number of scanning lines corresponding to the blanking period. The scanning line interpolation unit 81 performs interpolation calculations, and scans a! Change the number from 484 to about 4
The number of scanning lines is doubled to 1924, so that some of the scanning lines overlap during exposure so that they cannot be recognized as separate lines. Furthermore, the resolution can also be increased due to the interpolation effect.

The interpolation calculation in this invention is performed using the nearest Neyher method.
The pi-linear method and cubic convolution method are configured so that colors can be selected by switching a switch.

The nearest-to-ibar method converts the data of adjacent pixels into the pixel data of the adjacent pixel (+in-the-box-inhibition point σ), and converts it into 2-1. The bilinear method is suitable for images with many intermediate tones, and the bilinear method determines the pixel data at the interpolation point based on the assumption that the data between the scanning lines is uniform. u Suitable for 9J, Cupic convolution method is suitable for 16r around the interpolation point
The interpolation point is determined from the correlation of the iiiI+element data (σ), and is suitable for any image body.

This one noba oshiwari (.

Since it is necessary to perform 16 multiplications and additions per interpolation pixel for approximately 1.5 million β1 pixels per screen, the calculation speed is slow (it takes too much time) in computer software processing. Therefore, in the present invention, the scanning line interpolation section 81 is configured with a logic circuit, and data is outputted to the output section of the next stage in real time, thereby enabling extremely high-speed image output.

The image information subjected to KGB scanning line interpolation calculations at the same time in the scanning line interpolation section 81 is supplied online to the output section, and is output to either a color film or a film wound around the exposure section of the color scanner.

In addition, in this invention, through an interface with a layout scanner system that outputs with an editing function,
This enables more advanced prepress output and automation. In other words, when outputting to color film, the scanning line interpolation unit 8
The image information subjected to the scanning line interpolation calculation in step 1 is sent via the selector 92 to the high-resolution cathode ray tube of the color film production device 90 via the interface 91 for the color film production device, and converts each color into a wide optical wavelength energy in the visible range. Display the black and white images sequentially. A color film is placed in front of the high-resolution cathode ray tube through a filter corresponding to a black and white image having each information of 1 (OB), and each filter is switched in synchronization with the black and white image signal.
Sequentially exposed onto color film. Once the exposure is complete, the color film is advanced frame by frame to enable exposure of the next selected screen. The color film used is 6X7c/rL d-le film, and the standard image size is 51X68mm, which is about 8 times larger in area ratio than the image size obtained with conventional color cathode ray tube photography. Image quality is also extremely good.

Next, in the case of outputting a film from a color scanner, the image information interpolated by the scanning line interpolator 81 is sent to the color scanner via an interface 93 to a clock signal synchronized with the rotation speed of the color scanner 940. Transferred by The transfer information is sent as an analog signal to the color computer section of the color scanner 94.
After inputting the GB signal width part, the color scanner 94
The color printing color Y, fvi is processed through the signal processing system of
, C, BK (converted to G and output as Y, M, C, HK continuous tone separated versions on the film wrapped around the exposure section.

That is, the details of the color scanner 94 and layout system 95 are shown in FIG. 2, and the color scanner 221 picks up information such as a two-character color document using a scanning method, and the picked up analog image information is sent to the AD. The converter converts the information into digital information, which is then sent to the external memory 225 via the computer 223.
is memorized. The external memory 225 has a large storage capacity (magnetic disk device, approximately 300 MB).
If there is one or more than one, it's okay. Further, the image processing and editing device 224 is equipped with a keyboard, a digitizer, and a monitor display, and these devices are used to input page layout information of the block mount. This page layout information is also temporarily stored in the external memory 225 via the computer 223. If you want to make up the page, please use the image processing and editing system f? ! i: Enter commands from the 224 keyboard to recall page layout information on the display. Furthermore, a command is inputted from the keyboard to read image information from the magnetic disk device of the external memory 225 and move it to a designated trimming position. Next, when a mask-related command is input, image information other than the trimming size is erased from the screen, leaving only the necessary image information. If you are dissatisfied with the tone, retouching is also possible with correction instructions.

Commands and functions necessary for page make-up include, in addition to the above-mentioned movement, masking, and modification of the picture, cropping, overlapping and Z-up processing of the picture, and flat mesh/shading.

When the page make-up process by the operator is completed, the image information is stored in a predetermined magnetic disk device via the computer 223. The information after this page mailer up processing is converted into a film from the output device 226 when necessary, and is printed in Y (yellow), 1M (magenta), and C (cyan).

This is obtained as a laid out color separation plate 227 of BK (black). Note that the separation size of the valley 4 version depends on the number of scanning line interpolations and the number of exposure lines of the color scanner 85, so it is approximately 3.
2 x 4.3 G11L, approx. 6.4 x 8.6 c
m, about 9.7 x 12, 3 Cr1l + about 13.8
You can choose from 4 sizes of 18.4 cm x 18.4 cm. Furthermore, in this invention, the color scanner 85
It is also possible to supply the output to the layout scanner 86 and provide it with an editing function.

As explained in detail above, according to the present invention, continuous video images are displayed on a color cathode ray tube as in the conventional case,
Compared to the method of selecting a desired screen and photographing it with a still camera, the image quality is significantly improved7, and images suitable for indori can be obtained. This can be done in various ways, such as modifying the IGB signal gradation, converting the scanning method, and increasing the number of scanning lines through original interpolation in 2? In addition to η improvement processing, the time base corrector corrects the time lag in the video signal.

This is due to the effect of suppressing the noise signal contained in the video signal by the noise reducer and emphasizing the outline of the image by the detail corrector.

Also, compared to the method of taking pictures with a still camera, it is easier to select and extract screens. In addition, when a layout scanner system is introduced in the output section, manual departments with many labor-intensive elements such as photo processing, mask creation, and composition preparation, which are the main tasks in the plate-making process, can be automatically processed. You can expect effects such as: In addition, there are two display monitors in this system, one for screen selection and one for correction and non-correction comparison.Especially in the latter case, the screen synthesizer allows switching and monitoring independently or simultaneously, so color tone problems can be solved. problem is solved, and it is also economical.

Furthermore, the video information selected from the input medium of the slope is
Since the desired screen is selected and recorded on the video disk without looking at the H or T monitor, there are advantages such as a simpler configuration and lower cost.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing a part thereof in detail. 11...Video tape, 12...Video disc,
J3...Film, 14...Television radio waves, 2
J...VTR. 22, 32...VD tag, n...Telecine device, Sae...TV receiver, 5...'l' V camera, addition...
- Input switching section: 31, 71...CR'l' monitor, 50... Operation piece, 52... RGB decoder, 53
... Switcher, 54.83 ... AD converter, 60
...Image quality improvement unit, 70...Screen synthesizer, 80, 8
4...Frame memory, 81...Scanning line interpolation unit, 9
0...Color film production device, 94...Color scanner, 95...Layout system.

Claims (1)

[Claims] (a) Videotape, videodisc, film. an input section for inputting video signals from slides, telops, television radio waves, TV cameras, etc. through an input switching section and recording desired images on a mask video disk without watching the TV monitor; ([)) the input section; connected offline or online to the mask video disk of the master video disk, and each scan of the reproduced video signal of the master video disk Ivi! An image quality improvement unit that performs time shift correction between information signals, noise removal, and edge enhancement processing, and separation of luminance signals and chroma signals suitable for improving image quality and converting them to HOB numbers, as well as 'vv camera. , a correction unit that inputs old signals from the Captain System, etc., and performs correction processing for colors and gradations that cannot be adjusted independently of these Fli-4B signals;
An image comprising a display section that displays the RGB signal before correction and HGB 4G signal after correction on a monitor via a screen synthesizer, and a storage section that digitizes and stores the corrected R (iB times signal). (C) a signal conversion processing unit that is connected online to the image signal conversion processing unit and converts the '8 signal stored in the storage unit of the image signal conversion processing unit into odd field scanning line information and even field scanning; A color film production system that reads line information sequentially, interpolates the information between them by two-dimensional interpolation, etc., and then produces a color film or a layout output system that produces commercial quality color separation plates. Features a video image prepress system.