JPS5978352A - Plate making system for video picture - Google Patents

Abstract

PURPOSE:To perform video picture plate making of high quality by bringing a switching part, etc., under the control of a control part for corrections of a picture signal from a desired video source, conversion to color signals, and switching and output of an external signal, and interpolating a high-quality color signal on on-line basis. CONSTITUTION:The control part 40 controls a video source input switching part 30, a switching circuit 50 which switches and outputs the external color signal, a frame memory 53, etc. Then, the picture signal of a selected video source is corrected by a picture quality improving part 60 to obtain a high-quality picture signal, which is converted into respective color signals by an RGB decoder 52. Those signals and the external color signal passed through the circuit 50 are corrected with regard to gradations, etc., and stored temporarily in a frame memory; and they are read out as scanning information on odd and even fields by an off-line interpolating part 80 and processed by two-dimensional interpolation, thus performing the video picture plate making of high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video image plate-making system that can create high-quality color films or color separation plates online with a human output unit from image information recorded on a video tape or the like.

Due to the recent remarkable development and spread of video technology and changes in publishing trends due to the diversification of printed materials, it has become possible to use the desired II++1 page of continuous video information recorded on video tapes, etc. for photographs, printed manuscripts, etc. If you can do this, there will be many benefits. This is because compared to the traditional method in which photographers use still cameras to shoot film, there is less time to shoot, fewer opportunities to take photos, fewer shutter sounds, and fewer flashlights.

This is because it is free from constraints such as low brightness, and at the same time allows for the development of various needs. For example, a photograph or a printing plate can be created directly from video information recorded on a videotape, or a TV composite video signal or R (red), <3 < green), B
(Blue) It becomes possible to create a signal and then directly create a printing plate, making it possible to publish at a lower cost and faster than conventional methods.

However, when using video information recorded on a conventional videotape as a printing document, the videotape is first set in a playback device and displayed on an LXI' (cathode ray tube) using continuous, slow or stop playback. A film original is created by photographing the desired image with a still camera without observing the screen, and color separation plates are created from the film original using a plate making device such as a color scanner. The quality of the printed manuscript depends on the resolution of the TV image.However, color television broadcasting in Japan uses the NTSC system, and one screen has 525 scanning lines regardless of the size of the TV 1FII 1H. (1 frame).

Therefore, the image quality of the ■ frame is extremely poor in terms of image power, etc., compared to general color films. In addition, in the method of selecting a desired screen from continuous video footage and photographing it with a still camera, in order to improve the quality of the image, GILTO color temperature, the coloring characteristics and brightness range of RGB phosphors, and the color temperature of color film 1 color temperature are used. Due to inconsistency with material properties and concentration range,
There are problems in that a special color temperature conversion filter must be inserted in the front of the camera, and the hue and contrast of the color monitor must be adjusted. [Secondly, it is not always possible to obtain a satisfactory color tone with only these extraction pressures.

Furthermore, the number of television scanning lines is thick (influences the quality of resolution), and when the image projected on tl' is accurately focused and photographed with a camera, these scanning lines appear as horizontal stripes on the film. It will be clearly recorded. Since the scanning lines recorded on this film cause moiré fringes during the plate-making process, a photographing technique is required to erase the scanning lines. For example, to obtain a desired image from a continuous image with little movement, the effects of scanning lines are usually erased by exposing several frames onto a single film while playing back or slowing down. Since the image cannot be erased completely, I try to shift the focus of the photo slightly. However, this method has the disadvantage that it is difficult to accurately photograph the desired screen, and the screen may be blurred. Therefore, in order to obtain a desired image from continuous video with large movements,
The need to stop playback may arise. Normal 3/4 inch VT
In R, only one field of video signal is reproduced in the case of stop playback, and the vertical image power of the image projected on the CRT is halved, requiring a scanning line erasure photography technique that is even more difficult than in the former case. Ru. In such cases, since the wf image power of color film is generally around 50 lines/mm, a photographing method is used that takes advantage of the limits of color film's resolution. That is, the scanning lines are erased by photographing the desired image on the CRT at a reduced size of nine until the scanning lines are no longer distinguishable. Therefore, since video images with inherently poor image quality are photographed on color film in extremely small sizes, the final print size is at the A6 to A7 size limit, and any larger size has no commercial value. In addition, there is also the drawback that the workability is extremely poor 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 a desired frame from a video tape recorder that records a television video signal, and converts this video signal into three primary color images. There is a method that produces a printing plate by converting the three primary color signals into a print image signal and supplying this print image signal to a plate-making scanner. means for sequentially reading out signals in synchronization with the scanning speed; means for converting the NT8C signal into a B signal; and 1tGB signals Y (yellow) and 2M (magenta).

A means for converting the black (cyan) signal into a BK (black) signal and supplying it to the scanner is all configured online.

This device has effectively solved the problems mentioned above, but since the device configuration is all online, slow playback and stop playback of the video tape recorder must be repeated in order to obtain the desired screen. However, there are disadvantages in that the life of the video tape recorder is shortened, and the friction caused by the head of the video tape recorder can damage the video tapes of many customers. Furthermore, since the entire configuration of this device is online, it is not possible to independently perform the video processor 1 editing work and the signal conversion processing work, which reduces work efficiency.
There are problems in terms of efficiency. In addition, there are indispensable features such as a time base corrector that electrically corrects image jitter and dropouts, a noise reducer that removes noise other than the image signal, and a detail corrector that emphasizes the outline of the image.
・Because it is not mentioned, iL! There is also the title E in II: The Dignity of the Arms.

SUMMARY OF THE INVENTION Accordingly, 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.

From the beginning, 1) video tapes, video discs,
An input section that inputs video signals from film, slides, telops, television radio waves, and the TV left camera via a manual switching section; 3) an image quality improvement processing section that corrects the time difference between the hill line signals, removes debris, and enhances the contour; and 3) J (XjB
In addition to inputting the signal, the TV left camera captain system (Character and Pattern'
l'elephone AccessInformat
ion System) etc., the switching cylinder s which inputs the 1-rod iB signal and switches the output 1-, and 4) the cut-off (the ROB I^ number which is outputted from time to time) is temporarily stored in the frame memory, and this stored a gradation correction section that displays the image signal via a screen synthesizer, corrects the gradation while looking at the display screen, records it in a frame memory, and sends it to the scanning line interpolation section; 5) an input switching section; 6) a control section for controlling the section and frame memory; and 6) connected online to the scanning line interpolation section, in which the scanning line interpolation section sequentially reads out the RGB signals as scanning line information of the odd field and the even field;
This system is provided with a color film production system that produces a color film after interpolation using the information between them and two-dimensional interpolation, or a layout output system that produces high-quality color separations.

Next, a specific configuration will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention,
The input medium may be any medium as long as it generates an image signal, and VideoChive 11. Video disk (or floppy disk)12. Film (or slide, caption)
13. Think of television radio wave 14. The videotape 11 and the video disc 12 can contain not only one recorded screen but also a composite of several screens, and these input media J1 to J14 each have a v'i'it (video tape recorder) 21,
VDt (, (Video Disco Recorder) 22. In the telecine device, the image signal is reproduced by the rv receiver and transmitted between the input switching units. Also, the image information captured by the TV camera δ (for example, NTSC system ) may be transmitted to the input switching unit.

These image information input to the input switching unit I are selected by the operation of the control unit 211 and input to the input medium 1 translated into English.
The image information of 1 to 14 and 25 is transmitted to the image quality improvement section mark which will be described later. Note that if a video switcher is used as the input switching section mark, a composite image of any input medium can be created.

The image quality improvement unit (a) is composed of a time base collector 61, a noise reducer 62, and a detail collector 63. This is because if the data is stored in the frame memory with temporal jitter, there will be differences in the sample start point and the number of sample pixels for each scanning line. The noise reducer 62 is intended to suppress various noises and improve the image quality. This is to improve image quality that has deteriorated due to deterioration or noise generated in the signal conversion system or the like during playback of the re-recorded video tape 33. The detail corrector 63 emphasizes the points of change in the horizontal and vertical directions of the image,
Although the contour enhancement processing is performed to make the image (σ)
).

Iiii! Image quality improved with J quality improvement team 60 Ig issue R
The JV is sent to the 1-tGB decoder 52 and the NTS (,
'R (red), q (green), and B (blue) from the traffic lights! It is converted to a mercenary B signal. This RGB decoder 52 (Since the luminance signal Y and chroma signal C are separated by a rhombic filter, it is possible to obtain an image signal with excellent resolution and two color tones, and the separated l [H signal is processed by the switching circuit ) and A
The image information stored in the frame memory 53 is stored in the frame memory 53 via the D converter 51, and is transmitted to the scanning line interpolator 80, and is also transmitted via the L)A converter 54 and the screen synthesizer 70. It can be observed on a CIET monitor 71, and the output of the DA converter 54 is sent to the gradation correction section 7.
2 is also input. Also, a switching circuit! 50~ is TV camera (1 (013 method), captain system (1 (GB)
1 (UB signal) from a microcomputer, an office computer, etc. is inputted, and by switching the switching circuit power controlled by the cylindrical shaft section 50, the GB scratch signal can be inputted arbitrarily. A corrector and display 55 controlled by the control unit 40 are connected to the gradation correction unit 72, and the switching circuit power, AL) converter 51. Frame memory 53 and l
) For each of the 1st station marks that are input via the A converter, it is possible to modify the contrast by moving the platform by 2 gradations, changing the gradation of the light part or the shadow part, etc. by using the + cut operation, and the correction result can be adjusted. passes through the screen synthesizer 70 to the C1tT monitor 7
1 is displayed at any time. Therefore, the corrector and indicator 55
By inserting a cursor signal into the still image, the video level at any point of the still image displayed on the CRT monitor 71 can be adjusted to the video white signal reference value of 0.7.
As a comparison value for V, the number fLσ can be displayed on the display section of the corrector and display 55. Also, the input 1 (
Conditions for gradation correction for each G13 Butshu and setting position information of the corrector and display 550 gradation correction knobs are recorded on a recording device 5 such as a printer or floppy disk.
6 can be recorded.

In this way, the JG, B still image signal, which has undergone the necessary corrections by the corrector and display unit 55, is displayed on the C)LT monitor 71 via the screen synthesizer 70, and when the correction is completed, the control unit 40 By pressing the correct button, the corrected image information is converted into a digital signal of 765 pixels per scanning line via the ADz converter 73 and buffer memory 74 in real time, and the corrected image information corresponding to each R2O and B signal is displayed in the frame. The data is sequentially stored in the memory &, and the recording of [iB (g) for one screen is completed.

Note that the display method on the CRT monitor 71 may be such that the entire screen is first displayed with the image before gradation correction, and then the image after gradation correction is displayed on the entire screen by switching the screen synthesizer 70. , screen switching is optional.

In addition, as shown in the figure 1 (one screen is divided into two, one is the self-cleaning area 71A before correction, and the other is the image iI! area 7 after correction)
1B, a, the screen dividing line 71C is the screen synthesizer 7
It can be set to any position using a knob or the like provided at 0, and when the division 71171c is set at the left and right screen edges, it is the same as switching the screen.

The corrected still image information of (, G, H) newly stored in the frame memory 53 in this way is sent to the scanning line interpolation section 80. The signal is read out alternately in the order of odd and even field scan lines, and the scanning method is switched from an interlaced method to a sequential method, and this switching prevents "bearing", which is a drawback of the interlaced method. Prevent deterioration in image quality.

The number of scanning line signals transferred to the scanning line interpolation section 81 is 484 signals, which is obtained by subtracting the number of scanning lines corresponding to the blanking period from the 525 scanning lines of the television (N'l''SC system). In the scanning line interpolation unit 80, -C performs interpolation calculation (・, the number of scanning lines is approximately 4 times σ from 484) 1924
When exposing a book, some of the scanning lines overlap so that they cannot be recognized as separate lines. Also,
The resolution can also be increased by the interpolation effect.

The interpolation calculation in this invention uses the nearest neighbor method,
It is configured so that the bilinear method and cubic convolution method can be selected by switching a switch.

The nearest neighbor method uses the data of the adjacent pixel as the pixel data of the interpolation point, and is suitable for binarized images, while the bilinear method uses the data between scanning lines to change linearly. This method determines the pixel data of the interpolation point as follows, and is suitable for images with many medium Ill 1411. The cubic convolution method determines the pixel data of the interpolation point from the phase 1 length of the data of the 16 pixels surrounding the interpolation point. in,
In any case, the image of the 01 plane is also affected by j■. This interpolation calculation is performed by ]iI! Since it is necessary to perform 16 times of power 9- and addition per interpolation pixel for approximately 15 C) million pixels per one surface, computer software processing is slow and takes too much time. Therefore, in the present invention, the scanning line interpolation section 80 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 film production.

The image information subjected to simultaneous RGB scanning line interpolation calculations by the scanning line interpolation section 80 is supplied online to the output section, and is outputted to either a color film or a film wound around the exposure section of the color scanner.

Furthermore, the present invention enables more advanced prepress output and automation through an interface with a layout scanner system that also has an editing function.

That is, 1. When outputting to color film, a scanning line interpolation unit 80 performs scanning line interpolation calculations.

The image information is sent to the convex resolution cathode ray tube of the color film production device @ 83 via the interface 824 for the color film production device via the selector 81 (iN+l2).
1 (OB valley color is displayed as a black and white image with nail light wavelength energy in the visible range 11) I-order display.Then, on the front of the iVh solution 1 quadrant cathode ray tube, it corresponds to a black and white image with each information of bile B. A color film is placed through a filter, and each filter is cut off in synchronization with the black and white image signal t7, and the color film is sequentially exposed.When the exposure is completed, the color film is transferred to the next distance. Frame-by-frame advance is automatically performed to enable exposure of selected screens.The color film used is 6 x 7 C* size roll film, and the standard image size is 51 x 68 mm, which is different from conventional color film. It is approximately 8 times larger in area than the image size obtained with cathode ray tube photography, and the image quality is also extremely good.

Next, let us talk about the case of outputting a film from a color scanner. Image information interpolated by the scanning line interpolator 80 is sent to a clock signal synchronized with the rotation speed of the color scanner 850 via an interface 84 for the color scanner. Transferred by The transferred information is sent as an analog signal to the color computer section of the color scanner 85).
(After being input to the 313-I M amplification section, the color printing colors Y, M, and C are input through the color scanner 850-No. processing system.
, BK times signal conversion and Y, ,M on the film wrapped around the exposure section.

It is output as a continuous tone decomposed version of C and BK.

That is, the details of the color scanner 85 and layout stem are shown in FIG. is converted into digital information by an AI converter, and once sent to the external memory 225 via the computer 223.
Remember the first thing. As the external memory 225, a large storage capacity disk device (approximately 300 megabytes) is used.
It is sufficient to have one or more. In addition, image processing editing equipment f
The i1224 is equipped with a keyboard, a digitizer, and a monitor display, and these devices are used to input page layout information for the copy 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 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 possible under the Tokyo Metropolitan Government Ordinance regarding amendments.

Commands and functions required during page make-up include, in addition to the above-mentioned movement, masking, and correction of images, such as cropping, overlapping images, and flat screen/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 make-up process is converted into a film from the output device 226 when necessary, and is converted into Y (yellow), 9M (magenta), and C (cyan).

This is obtained as a laid out color separation plate 227 of BK (black). Note that the separated plate size of the valley 4 plate depends on the scanning line interpolation unit and the number of exposure legs of the color scanner 85, so it is approximately 3.
2 x 4.3 cm, approx. 6.4 x 8.6 cm
, approx. 9.7 x 12.3 cm, approx. 13.8 x 18.4
You can choose from 4 sizes in cm. Furthermore, it is also possible to provide the present invention with an editing function by supplying the output of the color scanner 85 to the layout scanner 86.

As described above, according to the present invention, the image before and after image information correction can be monitored on one CRT monitor, and the image information after correction is re-stored in the frame memory. This has the advantage that the device can be constructed easily and inexpensively, and that appropriate modifications can be made. Furthermore, it is extremely convenient because image information can be input directly from video tapes, video disks, etc., and images can be output online.

[Brief explanation of the drawing]

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,
13...Film, 14...Television radio waves, 2
1...V'l'R122, 32...Vl)R, 23
-...Telecine equipment, scraps...TV transmitter, 5...Pa1
゛V camera, blade...input switching section, 71...CI also T
Monitor, 4o”・fljlJ @J part, 52...几Q
B decoder, 53... frame memory, 51, 73
...AI) converter, ω...image quality improvement unit, 7o...
Screen synthesizer, 8o...Scanning line interpolation unit, 83...Color film creation, ¥; Placement, 85...Color scanner,
86... Layout system applicant's agent Yasu
Shape Male Third 2 Figure 22ri/

Claims (1)

[Claims] (a) Videotape, videodisc, film. an input section into which video signals from slides, captions, television radio waves, TV cameras, etc. are input via an input switching section; (l) each scanning line signal of the input video signal; (C) An image quality improvement processing unit that performs time lag correction, noise removal, and edge enhancement processing to generate RGB signals; From 1
a switching section that inputs and outputs the 08 number; , a gradation correction unit that corrects the gradation while looking at this display screen, records it in the frame memory and sends it to the scanning line interpolation unit; (e) a control that controls the input switching unit, the switching unit, and the frame memory; (f) connected online with the scanning line interpolation unit;
l. A color film production system in which the scanning line interpolation section sequentially reads R (3B signals) as scanning line information of odd and even fields, interpolates the information therebetween by two-dimensional interpolation, etc., and then produces a color film. or a layout output system for creating high-quality color separation plates.