JPS5978349A - Plate making system for video picture - Google Patents

Abstract

PURPOSE:To perform speedy, secure plate making of high quality by correcting and storing a picture signal of a desired video source recorded on a master video disc and interpolating the storage contents on an off-line for the plate making. CONSTITUTION:Picture signals from desired video sources 21-25 such as a VTR, disc, telecine, TV receiver, TV camera, etc., after passing through an input switching part 30 are recorded on the master video disc 12. This reproduced output is supplied to a picture quality improving part 60, where time- difference correction, noise elimination, and contour emphasizing are carried out to obtain a high-quality picture signal, which is converted by an RBG decoder 52 into respective color signals. Those color signals and an external color signal passed through a switcher 53 are recorded on a disc 81 through a gradation correcting part 72. Thus, a signal for plate making which is interpolated on an off-line mode and used is obtained. This constitution realizes the easy and secure plate making of high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for recording a desired screen on a mask video disk from a continuous video signal such as a pre-vision signal recorded on a video chip, etc. The present invention relates to a video image plate-making system in which a plate is created offline.

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 desired screens from continuous video information recorded on video tapes, etc. for photographs, printed manuscripts, etc. Compared to the traditional method of shooting film using a cameraman or a still camera, there are many advantages: rapid shooting, photo opportunity, shutter sound, and flash light.

Is it due to constraints such as low brightness?l') At the same time as I'lr is released,
This is because unique needs can be expected to develop. for example,
You can create interview photos and printing plates from video information recorded on video tapes, etc., and also create composite video signals of television or 1 (red) from movie film using a telecine device.
G (green) and B (blue) A100 issues can be created, and from now on, printing plates can be created directly, making it possible to publish at a lower cost and faster than conventional methods.

However, when using conventional video information recorded on a videotape as a printed document, the videotape is first set in a playback device and continuous video is displayed on a CGR (cathode ray tube) using slow or stop playback. However, after creating a film original by photographing the desired image with a still camera without looking at the screen, color separation plates are created from the film original using a plate making device such as a color scanner. Therefore, the quality of the printed document depends on the resolution of the television image. However, color television broadcasting in Japan uses the N'1' 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 extremely poor in terms of resolution etc. compared to general color film. In addition, in the method of selecting a P-view screen from a continuous video image and photographing it with a still camera, in order to improve the quality of the image, the color temperature of CIL, the chromaticity and brightness range of B phosphor, etc. Due to the inconsistency between the color temperature of the color film, the characteristics of the coloring material, and the density range,
In addition to inserting a special color temperature conversion filter in the front of the camera, the n^1 adjustment of the color monitor's hue and contrast, etc.
There is a 1j4] theme that says ``hair must be styled'' and ``1-rudo''. Moreover,
These corrections alone do not necessarily result in a satisfactory color tone.

Furthermore, the number of television scanning lines affects the quality of the resolution (in addition, if the image that is not projected on the CI (ff') is accurately focused and photographed with a camera, this scanning M will appear as horizontal stripes on the film. The scanning lines recorded on this film cause moiré during the plate-making process, so a photography technique that erases the scanning lines is required.For example, if a continuous image with little movement is To obtain the desired image, the effects of scanning lines are usually erased by exposing several frames onto a single film while playing back or slowing down, but this cannot be done completely. The focal point of the image is slightly shifted to '1'. However, this method has the disadvantage that it becomes difficult to accurately image the desired image and the image becomes blurred.

Therefore, in order to obtain a P9i-desired image from a continuous video with large movements, it is necessary to perform stop playback. Normally 3/4
Inch V'I'R, in the case of stop playback, only one field of video signal is reproduced, and the vertical resolution of the image projected on the CRT is halved, making scanning line erasure a more difficult photographic technique than in the former case. is required. In such cases, the resolution of color film is generally 50 lines/
Since it is around mrn, a photographing method is used that takes advantage of the limits of color film resolution. That is, C
) t, the scanning line is erased by photographing the desired image on T in a reduced size until the scanning line cannot be distinguished. therefore,
The final print size is A6 to A7 because the video images, which originally have poor image quality, are shot on color film at a very small size.
There is a limit to the judgment, and if it exceeds the limit, it 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.

In order to solve the above-mentioned problems, a television image plate-making device is used, for example, which reads a video signal corresponding to one desired frame from a video tape recorder that records a television video signal, and divides this video signal into three pieces. By converting the three primary color signals into a printing image signal, and supplying this printing image signal to a plate-making scanner, printing plates can be manufactured in various sizes. means for performing a primary reading in synchronization with the scanning speed of the scanner; means for converting the N'I'SC signal into an RGB signal;

The means for converting C (cyan) to BK (black) signals and supplying the signals to the scanner are all constructed online. This device has solved the above-mentioned problems21), but since the device configuration is all online, the video tape recorder has to repeat slow playback, stop playback, etc. to obtain the desired screen. The disadvantage is that the lifespan of the tape recorder is shortened, and the friction caused by the playback head of the video tape recorder can damage the valuable video tapes of our customers. Therefore, the videotape editing work and the signal conversion processing work cannot be performed independently, which poses problems in terms of workability and efficiency.Furthermore, it takes a long time to electrically correct image jitter and drag noise. There is no mention of the need for a base collector, a noise reducer that removes layers other than the image, a detail collector that enhances the contours of the image, and there are also problems in terms of image quality. Therefore, it is an object of the present invention to provide a video image plate making 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
2) An input section that inputs the video signal from the right camera via the input switching section and records the desired image on a mask video disk while watching a monitor TV; and 2) a mask video disk 1 of the input section that is connected offline or online. , n between each scanning stock number of the Niu video signal of the masked video disc,
The I5 image quality improvement unit performs 1141 off-center correction, noise removal, and edge enhancement processing, and separates the luminance and chroma signals that were missed in improving image quality and converts them to 3GB. rv camera, captain system (Cha
racterand Pattern 'I'elep
honeAccess InformationS
system), etc., and a correction section that performs color and gradation correction processing that cannot independently adjust these ROB signals, and a correction section that performs color and gradation correction processing. (3) an image signal conversion processing unit comprising a display unit that displays the B signal on a monitor via a screen synthesizer, and a storage unit that digitizes and stores the corrected ROB signal; and 3) image signal conversion. The GE information is configured offline with the processing section and stored on a floppy disk in which the output signal of the image signal conversion processing section is written. (The GE information is read out sequentially as odd field scanning line information and even field scanning line information. , a color film production system that produces a color film after interpolating the information therebetween by two-dimensional interpolation, or a color scanner or layout production system that produces high-quality color separation plates.

FIG. 1 is a block diagram showing an embodiment of the input section and image signal processing section of the present invention, and the input medium of the input device may be any medium that generates a video signal, such as a video tape 11. Video disk (or floppy disk) 1
2. Film (or slide, caption) 13. Television radio waves 14 can be considered. The videotape 11 and the video disc 12 are not recordings of the construction screen, but can contain a composite of several screens, and these input media 11 to 14 are each a VTR (video tape recorder) 21, The video signal is reproduced into a video signal by a VD recorder (video disc recorder) 22, a telecine device, and a TV receiver, and is transmitted to the input switching section 30. Further, video information (for example, NTsC system) captured by the TV camera 5 may be directly transmitted to the input switching unit 3o.

The input image information inputted to the input switching unit by the genius 1 is selected by operating the operation console 50, and the selected input medium 1
Images 1 to 14 and 25 are displayed on the (J?I" monitor 31. Then, the operator
By operating the operation console 5o while looking at the screen displayed on the screen, the image information of the desired screen is recorded on the master video disk 33 by the video disk recorder 32 for each scene. In this case, if a video switcher is used as the input switching section I, a composite image of any input medium can be created. In this way, the VDI-L3
The image information recorded on the master video disk 33 in step 2 is reproduced on the VDR 32 during plate making, but the soil lifting operation is controlled by the operation console 50.

Thus, the image signal from the mask video disc 33 that is played back on the Vll 32 is transmitted to the image quality improvement process, where the image quality improvement process is performed. σ) Image quality improvement section 6
0 is time base collector 61.1! :,/It is composed of an islet reducer 62 and a titer collector 63. The time base corrector 61 is for correcting the temporal deviation between each scanning line of the video signal, which is called a current jitter. There are differences in the sample starting point and the number of sample images for Soukihi.

The noise reducer 62 is intended to suppress various noises and improve the image quality, and the image quality recorded on the original 3!4 inch wide videotape 11 provided by the customer may have deteriorated due to noise etc. This is intended to improve image quality that has deteriorated due to noise generated in the signal conversion system or the like during playback of a video editing section or a re-recorded videotape. The detail corrector 63 emphasizes the points of change in each of the horizontal and vertical directions of the image and performs contour enhancement processing to make the image disappear.

This reproduction operation can be performed online or offline. Then, the image signal R1V whose image quality has been improved by the image quality improvement unit (a) is expressed as I(Jj
Sent to B decoder 52 and NTSC! 1 (red), G (green), and B (evening) are converted to 1 (GH 4) from No. Therefore, it is possible to obtain an image signal with excellent resolution and two color tones. After that, it becomes possible to observe on the screen 71A of the CR'J'' monitor 71. Also, the switcher 53
TV left camera) (OB system), captain system (I (Gt3 signal)).

ROB signals from a microcomputer, office computer, etc. are input, and these l[B signals can be taken in by switching the switcher 53. That is, the I[iB multiplied signal taken in through the switcher 53 is converted into a digit by the AD converter 83, and then stored in the frame memory 84, and is stored in the DA F and the converter 8.
5, it is converted to analog and then sent to the screen synthesizer 70 and the gradation correction unit 7.
Sent to 2. Further, a corrector and display 55 controlled by the operation console 50 are connected to the gradation correction unit 72, and the contrast correction unit 72 is connected to a nine-level contrast correction unit by manual operation for each of the HGB signals inputted from the switcher 53. It is possible to adjust the parallel shift of the tone, the gradation of the light part or the shadow part, etc., and the correction results are displayed on the CI-tT monitor 71 via the screen synthesizer 70 at any time. By inserting cursor No. 1g to the stationary bacterial strain from the corrector and display 55, the video level at any point of the 11 stationary images displayed on the CILT monitor 71 can be adjusted to the video white signal reference value. It should be possible to numerically display the comparative value for sail 7■ on the corrector and the display section of the display 55. In addition, conditions for applying gradation correction to each of the input RG13 signals and setting position information of the gradation correction knob of the corrector and display 55 are stored in an external memory via an external memory recording/reproducing device 56. (for example, magnetic tape, paper tape) 57.

(Thus, the 几, G, B still image signals that have undergone the necessary corrections by the corrector and display unit 55 are displayed on the CR'l' monitor 71 via the screen synthesizer 70, and the correction is completed. - Then, by pressing the corrector indication switch on the console 50, the AD converter 54 converts 765 pixels per scan in real time to digital signals (K, Ratio, G, and B signals). 1 (OB) signal recording for one screen is completed.

Furthermore, the display method on the CRT monitor 71 is such that the entire screen is first displayed as iI! before gradation correction. ll image display 1, and then display the gradation-corrected image on the entire screen by switching the screen synthesizer 70 (switching between both sides is optional. Divide the screen into two, one with image areas 71A and t7 before correction, and the other with image area 71A and t7 after correction.
If I41I body area 7.18, screen dividing line 71
0 can be set at any position using a knob etc. provided on the screen synthesizer 70, and the dividing line 71
If C is set at the left and right screen edges, it is the same as switching the screen.

1:L written in the frame memory 80 in this way
, (3. The corrected still image information of H is displayed on the operation console)
As a result of the operation, the fan 1 is sent to the floppy disk driver (FDD) 81 via the selector 86 to R and G 130F in order, and is then transferred to the floppy disk 82. For this writing, it is necessary to control the loading of the frame memory 80 in accordance with the loading speed of the floppy disk 820. Furthermore, the frame memory 80 could be replaced with a line memory, but in this case the time required for writing would be even longer.

From the floppy disk 82 storing the image information of these H(fB), a color film is created by a color film creation 1J120 with an off-line configuration as shown in the 24th section, and printed separation plates are created by a color scanner 221. This color scanner is connected to the layer scanner 222 as needed to create a layout image. The disk 82 is set in the floppy disk driver 101, and the read image information is written into the frame memory 104 via the multiplexer 102, and then transferred to the color film production device σ120 or the color scanner °2/21θ.
) Ask the scanning line interpolation unit 103 to match the scanning speed.

The scanning line 4tfi interval 103 performs interpolation of −(σ between scanning lines) according to a predetermined arithmetic expression. When trying to obtain a color film, use the interpolated high-density image @ information.
It is sent to a color film production device #120 via a 1:3 selector 105 and an interface 110 to obtain a color film.

In addition, the color film making device costs 120 yen and has a limit of 13
A frame memory 104. Selector 1
05 and interface 110. In the signal transferred to the scanning line interpolation unit 103, the scanning lines of the odd field and even field are read out alternately in the order of the lowest number, and the scanning method is switched from the interlaced method to the sequential method. This prevents pairing, which is a drawback of the skipping method, and prevents the deterioration of 11ii quality. The number of scanning line signals transferred to the scanning line interpolation unit 103 is 4, which is the number of scanning lines for television (NTSC system), 525 minus the number of scanning ft9 corresponding to the blanking period.
This is 84 signals. The scanning line interpolation unit 103 performs interpolation calculations to increase the number of scanning lines from 484 to approximately 4 times 1.
Increased to 924 lines, and when using 2 elements, one part of the scanning line becomes 羢/, [
The lines are made to match each other so that they cannot be recognized as separate lines. Also, the resolution can be increased by the interpolation effect.

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

The nearest neighbor method uses adjacent pixel data directly as pixel data at the interpolation point, and is suitable for binarized images, while the bilinear method uses data between scanning lines or i3! +V
This method determines the pixel data at the interpolation point based on the correlation between the data of the 16 pixels surrounding the interpolation point, and is suitable for images with many intermediate tones. It is your choice and is suitable for any image. This interpolation calculation is performed by drawing one interpolated pixel for approximately 1.5 million pixels per 1iIfj element.
Since it is necessary to perform Fj multiplications and additions, the computer's software processing is slow and takes time. Therefore, in the present invention, the scanning line interpolation unit 10
3 is configured with a logic circuit and outputs data in real time to the output section of the next stage, enabling extremely high-speed film production.

- On the other hand, when obtaining a color separation plate for a layout image, the interfaces 110 and 210 are switched, and the image signal from the scanning line interpolation unit 103 is sent to the layout scanner system 2200 color scanner 22 via the interface 210.
1, and the layout image module 222 obtains color separation plates for the layout image. The details of the layout output system 200 are shown in FIG. 3. 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 transferred to an AI converter. converted into digital information,
The data is temporarily stored in the external memory 225 via the computer 223. As the external memory 225, it is sufficient to have one or more magnetic disk devices with a large storage capacity (approximately 300 megabytes).
24 has a keyboard and digitizer.

A moguta display is attached, and these devices are used to input page layout information for the mount. This page layout information is also temporarily stored in the external memory 225 via the computer 223. Note that when performing page make-up, a command is input from the keyboard of the image processing and editing device 224 to call up page layout information on the display. Furthermore, a command is inputted from the keyboard to retrieve image information from the external memory 225's iA disk device and move it to the specified trimming position. Next, when a command regarding the mask is entered manually, the mask is erased from the image other than the cropped size, leaving only the necessary image information. If you are dissatisfied with the tone, retouching is also possible with correction instructions. Commands and functions required during page make-up include, in addition to the above-mentioned movement, masking, and correction of patterns, such as cropping, overlapping patterns, and flat mesh/silk stitching. When the operator completes the normal page make-up process, the image information is stored in a predetermined magnetic disk device R via the computer 223. Information on this page after makeup processing is as follows:
When necessary, it is converted into a film from the output device 226,
Y (yellow) 2M (magenta), C (cyan), BK (black)
This is obtained as a laid out color separation plate 227.

Although Fig. 2 shows an example of a system in which a color film and a layout image are not obtained at the same time, if a color film and a layout image are to be obtained at the same time, the color The film production system and the layout output system shown in FIG. 5 may be provided separately. The operation of each system is exactly the same as in the case of FIG.

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 dramatically improved and images suitable for printing can be obtained. This is achieved by increasing the number of scanning lines by converting JjB signal gradation signal pressure, scanning method conversion, and two-dimensional interpolation processing. In addition to the processing, the time base corrector corrects the time deviation of 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.

It also has the advantage of being able to easily extract the screen compared to the method of taking pictures with a still camera. Furthermore, since the signal conversion processing section and interpolation processing and output section are configured offline, each task can be performed independently and can be performed at any time, resulting in highly efficient operation. I can do it.

Furthermore, it has the advantage of being able to dedicate color film output and color scanner output, and when a layout scanner system is installed in the output section, it is possible to use the main tasks of the plate-making process, such as photo processing, mask creation, and other composition preparations. It is expected that manual departments with many labor-intensive elements such as synthesis will be able to be processed automatically. In addition, this system has only one display monitor, which can be switched and monitored individually or simultaneously using a screen synthesizer, which solves the color tone problem and is also economical.

Furthermore, video information selected from multiple input media is
Since the desired screen is selected and recorded on the video disc while looking at the master monitor, there are advantages in that the configuration is simple and the cost is low.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of the configuration of the input section and image signal variation processing section of the present invention, Fig. 2 is a block diagram showing an example of the output section of the invention, and Fig. 3 shows a part thereof in detail. The block diagrams shown in FIGS. 4 and 5 are block diagrams showing other examples of the output section of the present invention, respectively. 11...Video tape, 12...Video disc (
floppy disk), 13...film (slides, captions), 14...television radio waves, 21...
・V'I'R. 22, 32...VD) also...Telecine compensation,
U...TV receiver, 5...TV right camera 30...
Human power switching section, 31, 71...CI? 1' monitor, 5
0... Operation bank, 52... RGB decoder, 53...
・Switcher, print...image quality improvement unit, 70...screen synthesizer, 80, 84, 104...frame memory,
82...floppy disk, 81, 101...
Floppy disk driver, 102...Multiplexer, 103...Scanning line interpolation unit, 120...Color film production jK,! , 220... Layout scanner system, 221... Color scanner, 222...
...Layout system.

Claims (1)

[Claims] (a) Videotague, video disc, film. Slides, captions, and television broadcasts
A human power section that manually inputs the video image from a V camera etc. through an input switching section and records the H1 image on a mask video disk while watching a monitor TV, and (1)) a master video disk of the human power section. an image quality improvement unit that is connected offline or online and performs blur correction, noise removal, and edge enhancement processing for the time H'j between each scanning # signal of the reproduced video signal of the mask video disk; It is possible to convert the appropriate luminance signal and chroma signal into 1tGH (e), input the HJjB signal from the 11V camera, captain system, etc., and adjust these 1B and 1B signals independently. and a correction unit that performs gradation correction processing, and the old signal before correction and 1 (after correction).
an image 4m number conversion processing unit comprising a display unit that displays the CiB-foil number on a monitor via a screen synthesizer, and a storage unit that digitizes and stores the modified 1-but-B signal;
(C) The image signal conversion processing unit is configured offline, and the 1 (OB double signal, odd field scanning line information and even field scanning line information) stored in the storage unit of the image No. 4 conversion processing unit is configured offline. A layout output system that creates a size color film production system or a high quality color separation plate after interpolating the information therebetween and two-dimensional interpolation etc. A video image prepress system featuring: