JPS5831330A - Photographing method and device for video picture - Google Patents

Abstract

PURPOSE:To generate a color film of a high-quality picture from a television signal, by exposing the image, which is projected to a high-resolution FSS tube by three primary color signals of a color picture, onto the film through three primary color filters individually. CONSTITUTION:R, G, and B picture signals are subjected to A/D conversion and are stored in frame memories 2a-2c, and signals read out by a photographing switch are applied to the luminance modulation terminal of a flying spot scanner FSS tube, which uses a white phosphor and has a high resolution, of a photographing part 7 after the increment of the number of scanning lines in interpolation calculating parts 3a-3c and the adjustment of the hue and the gradation in gradation adjusting circuits 5a-5c, and three primary color filters are switched to expose colors of the image onto a film time-differentially. Thus, the hue and the gradation matched to photosensitive materials are obtained, and a color film of the high-quality picture which has hardly defocusing of the lens and is superior in resolution is obtained form the television signal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method and apparatus for creating a color film for stone printing using an original image signal (R, G, B color image signals of JX colors) for creating a color separation plate. It's made of stone.

Normally, color printing is a process in which a single printing separation plate is created for yellow (1), FF Zenda (2), cyan CO), and cloudy (BL), and this printing separation plate is used to perform color printing. There is. Conventionally, a direct plate making method has been used to create printing separation plates from color images, in which the printing separation plates are directly created using a color scanner. The direct plate-making method is advantageous because it has fewer steps than one process, so it shortens the time required for plate-making and has low production costs, but it does not allow for sufficient color balance and gradation adjustment of each color of R, G, and B. This JIL-bx is easy to use in the plate making method from befilm. In addition, if you use film, you can edit it by combining it with other photos, and it is convenient for storage. For these reasons, an apparatus for producing printing film from color images has become necessary.

Conventionally, the easiest way to take pictures of video images has been to take a picture of a television receiver with an ordinary camera.Such a method is cheap, has poor quality, and is difficult to photograph. The result is an inferior image compared to one taken directly with a machine.

The 1011th cause lies in the television system itself. In other words, the standard television system is -mm! -! Since the field consists of 41 IIJ scanning lines (effective number of 41IIJ), if the size of the field is about tAjWi, the scanning line density is J per ■, 2 mm, so the scanning lines are visible. It is known to apply a fold ring or defocus to make the lines invisible, but this results in a reduction in resolution and a deterioration in image quality. On the other hand, in general printing, the scanning line density is from 6 to 1 per print, so the scanning lines are invisible and the image quality is good. In addition, the standard television signal is an interlaced V~bare scanning system in which /1iiiiiil frames are divided by odd and even fields, so the scanning lines of the odd and even fields are spaced evenly between 111 on the screen. However, it has the disadvantage of causing bearings that look like stripes and being easily damaged. Furthermore, frequency band 0III
! In addition to deteriorating the resolution of the image because the image is received by the eye, distortion occurs due to the imaging, modulation and demodulation, transmission, writing to the VTR, the mechanical structure of the Oat color phosphor in the picture tube, etc., and the image quality deteriorates.

Furthermore, when photographing a television set in color, color mismatches and density gradation mismatches between the image and the film photosensitive material also become interlayers. Therefore, in order to obtain a color film suitable for printing from a 2-television code, it is necessary to address these problems appropriately.

Conventionally, partial IJ of these O interlayers has been used for purposes other than making printing films! There are examples in which the kIl is achieved, but all of them are insufficient for printing purposes. It was. Although direct plate making equipment for the purpose of 1g tone has been manufactured, equipment for creating color film has not been manufactured for purposes other than printing. Kinesu: There is a device called a recorder. This is a combination of a high-quality monitor with improved distortion, shading, and overall configuration, and a photographic camera, and a cine camera made with a dyke and four-stroke system that uses a flat-face cathode ray tube. There is something. The former company's regular CRT for receivers has little raster distortion and shading, but other problems have not been solved.The latter is a flat 7 ace, so the fluorescent surface is curved. It is advantageous for the geometric curves that occur due to sand color f, and various adjustments can be made for each sand color, but since it is a J-tube type, it is easy to cause misregistration, and since simultaneous exposure is required, the fill five sensitivity and OII of each color can be adjusted. In addition to the drawback that it is not easy to straighten, there was also the problem that *m would become rough when stretched because it was a 142m or H* film finish. Although it is good for obtaining continuous photographs, it is uneconomical for obtaining a small number of still photographs. Those with excellent resolution and VH feature 1 include color television signals, R, G, B signals or IO signals (brightness).

The four methods are A, which converts the Rita-ma signal and simultaneously or time-divisionally converts the black-and-white image into a black-and-white image, which is then photographed as a black-and-white photograph, or exposed directly onto a black-and-white film using a laser beam. However, these methods have the disadvantage that color films cannot be obtained directly and that they require post-processing. There is also a method of directly creating a color hard copy by dry development using photographic paper instead of regular film, but compared to using film, the color balance is poor and the resolution is not as good. As, flat face force 2 - picture tube Kj! There is a camera that is combined with a camera that produces sand when baked, but since the fluorescent surface is not curved, it has the advantage of less distortion and defocus at the edges, but since it is a hard copy using dry development, the image quality is poor. There is an interlayer. It was,
There are devices that can make so-called hard copies as computer peripherals, but all of them are capable of making printing films.
・It doesn't get hot when used, and the layer speed is slow.

The purpose of the present invention is to solve the above-mentioned problems, to make it possible to photograph a large ISs tube with a flat face and high resolution as a cathode ray tube with a large-sized camera, and to make it possible to arbitrarily set the exposure interval during photography. It is an object of the present invention to provide a film photographing method for producing a film with good interstitial content.

Book *Binnai: In order to create a color film of the image from the color surface image signal, the J primary color signal of the color image is loaded onto a high-resolution 7 line spot scanner tube with a glossy white phosphor. This method is characterized in that the extracted images are individually exposed onto a film through 771 color filters.

In addition, the purpose of the W140 of this invention is to independently correct R, G, and B for gamma, brightness, contrast, bright areas, and dark areas, so it can be used as a photosensitive material for film! This invention attempts to provide a gradation adjustment method that speeds up the tone and gradation of each color by adjustment.

The present invention was projected onto a high resolution 7 line spot scanner tube with white phosphor! In a film O production device in which an image based on a primary color signal is exposed onto each ylIK color film using filters of three primary colors, and the number of exposures can be arbitrarily set according to the light wavelength characteristics of the 7-d spot scanner tube and the film. , K1 for each color
It is characterized by the fact that it has 110 gradations and can independently produce gradations according to the photosensitivity characteristics of the color film.

Still another object of the present invention is to solve the problems of the TV screen system by converting the interlaced scanning system into a progressive scanning system to prevent bearings and increase the number of scanning lines by interpolation.
Color balance and gradation adjustment are carried out independently for G and B, and K is used to improve the image quality so that the flat-faced, high-resolution large ySs cathode ray tube can be photographed with a large camera, and the number of O exposures during shooting is reduced. It is an object of the present invention to provide a photographing device for video images which can be set arbitrarily and which solves all the problems necessary for producing a printing film from a television broadcast signal.

The present invention uses an interpolation calculation section to improve the resolution of the image in a device that creates a color film of the image from the color image signal, and ◆color-independent gradation adjustment based on the light sensitivity characteristics of the film. A high-resolution 7-line dust spot scanner tube with a white phosphor and an inter-level adjustment section where adjustments can be made.
10 is characterized in that the photographing section is composed of a one-color filter, a black-and-white MD filter, and a camera.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing the configuration of an embodiment of a video image photographing apparatus according to the present invention.

The R1σ and B image signals applied to the apparatus are converted into digital signals of 714 pixels per scanning line in the present embodiment by converters /a, /b, 10.

The sampling frequency at this time is the color i+g*multiply of the transmitted wave. The digitized R, G, and B signals are separated into seven separate frames (Jl, Jl).

The 2OK odd field and the even 'tk field are stored as separate addresses. When the photographing 0 switch is turned on, a read command is added to the above 7-frame memory, and the scanning lines of the odd and even fields are read out alternately in ascending numerical order. As a result, the scanning line # is switched from the O''ee candle scanning method in which it is read out sequentially to the progressive scanning method, and bearing can be effectively avoided.

The image data read out from the frame memory after the above-mentioned process is sent to the interpolation calculation units Ja, Jb, and JOK. In the interpolation calculation, a new scanning line is formed between each scanning line. The pixel data of this new scanning line, that is, the data of the interpolation point, is determined by considering the correlation with the interpolation point of surrounding pixels. In the air rest naper method that is adopted, one other *scan line data changes linearly, the sumi pie V-a method, and a tool that takes into account the influence of waste i/≦pixel. - Bit Composite Tools - The 6-shot W140 video image O photographic device, which has methods such as the printing method, is configured so that the JllO interpolation method described above can be switched and used automatically depending on the image. Three scanning lines are formed by equally dividing the space between each scanning line, and after the interpolation is completed, 0
／ Since the scanning lines that intersect with 1 and 1 have overlapped gold dust, it is even more difficult to see. Previously, by interpolation, a part of the straight-direction double-image Confucian symbol at 1m11 of sand is restored.The above-mentioned processing Each R,G completed.

The B signal is converted into an analog signal by Vmu converters ja, jb, $OK, and then sent to gradation adjustment circuits ja, jb.
, jo K added. This gradation adjustment circuit has R, G
, 11 separate dyes, each independently gamma,
brightness.

Each R, G, J3g is corrected by the 0-gradation WIi adjustment circuit, which can perform each correction of contrast, bright areas, and dark areas, and can adjust the tone and gradation of each color to match the photosensitive material of the film. The numbers are selected sequentially by selecting -R, G, B selection switch n! , G, and B signals to the photographer. In ζO photography, the supplied signal is
It is applied to the brightness modulation terminal of the S tube, but at this time R,
Since the configuration is such that the number of exposures for each of the G and B colors can be set to appropriate values, it is possible to obtain -v latched color tones and gradations in the photosensitive material of the film, in addition to the above-mentioned adjustment effect. In addition, in one beam 11, visible light range 111
Destination 1 using a white light OII light body that consumes all the 0 light length components.
The 8s tube uses R, G, and B filters, and the K11l configuration is used to provide light at different times by switching the filters. The 18S tube used in this photo shoot lI7 is
The bright spots are small, the resolution ta is extremely high, and the fluorescent surface is flat, which is advantageous because geometrical distortion can be reduced when taking photographs. Since each of the R, G, and B signals is exposed onto the film separately using a filter, there is no significant difference in the R, G, and B images. Misregistration is a book! This is a fatal flaw when high scanning line density is required, such as in II light, but as mentioned above, the use of a large finch syss tube and the use of R, G, and B. This was avoided by dividing exposure, and at the same time succeeded in minimizing out-of-focus and shading. More on this device! A high-resolution, high-resolution camera was used as a camera, and the camera shutter and film winding mechanism were operated by remote control to ensure that the KL and KJ primary colors could be illuminated.

Next, we will explain the interpolation calculation method used in this example. Figure 1 shows the explanation of the interpolation calculation in the upper left corner of the screen. It has a configuration that allows you to select from three types of interpolation methods: compolator method, bilinear method, and nearest Naper method.
Since similar methods have been used in other examples, the cubic convolution method will be explained here as a representative method. The cubic convolution method uses the area around the interpolation point /A
It is determined by taking into account the correlation of the ll elements with the interpolation points, and Pg (L = /-41, J = /-ge) is the winter pixel data on the scanning line, α1. (See 1-l-.

If j = / ~ reference) is a pixel coefficient (different depending on each interpolation method) corresponding to the interpolation point of 21i that represents the correlation, then heat,
The pixel data at the interpolation point xK is *L for each pixel P. In this example, we implemented a circuit that performs interpolation calculations for the l-pixel shown in the shaded area in the diagram to make it compatible with output devices that receive all pixels as digital values.
Interpolation at an arbitrary point and interpolation on a pixel column are performed by exchanging the ROM that stores pixel coefficients, but here we have a twist when interpolating on a pixel column that is normally used. I'll explain. In Figure 3, the order of interpolation calculation is first between the 3rd line and the 3rd line! , For the 0 position, Xo, Xl, ! ! + Each scanning line is determined by interpolation calculation in the order of X5. Each scan line is
It is obtained by repeating the above-mentioned 14 products and their total sum 01 times. Below, the same calculation is performed by shifting the - raw data line for 14H!
Repeat this to complete the interpolation of the entire screen. FIG. 2 is a block diagram showing a fringe lEa interpolation calculation circuit. The pixel data read from the 7th frame memory is input to the input buffer/jtL.
RAM/71L Nna l'c write trench via N/16, multiplier and addition @n&-/9e by address signal applied via address buffer 7/4
added to l. On the other hand, the stored pixel coefficients are added to the above multiplier and adder via the pixel coefficient buffer/I. In this way, the % interpolation calculation is performed in parallel with the reference circuit, because it takes time to write and request the 0 multiplier and the circuit consumes more time than the required processing time. In the adder, the multiplied data is added one after another, and once the product of each /@element is added, this data is sent to the adder@M, and the sum is sent to the next stage via the Sibus Spuffer. It will be done. The RO voltage corresponds to the multiplier and adder of the reference channel, and l≦a −/46 (using 8 D and RA
The M pixel data and the multiplier are arranged so that a total of three pixel coefficients can be read out at the same time.

The address of each ROM is
Y method, Pairinya method, Airest name sister.

Then, without performing interpolation calculations, the interpolation line X, , ! , ,x,.

xl and interpolation position X, , X, , ! , , Xρ
(Evaluation divisions), and each division stores 3 O11 prime coefficients. Selection of the interpolation method O can be performed by a selection switch 8 provided on the operation panel, and selection of the interpolation line/interpolation position O is automatically performed by a control circuit.

No. J@ is a block diagram showing the configuration of a gradation adjustment section and a photographing section. The data for which the interpolation calculation has been completed is transferred to the KD/mu conversion circuit #1.
It is converted into an analog signal and the gradation is adjusted in the gradation adjustment circuits jl, jb, and IO.The 0 gradation adjustment produces an image with the best gradation based on the photosensitive characteristics of the film used. Gamma correction, which adjusts the exponential characteristics, as shown in Figure 1.
There is a brightness adjustment that adjusts the overall tone of brightness, a contrast adjustment that adjusts the rate of linear change, a partial adjustment that adjusts the contrast of bright areas, and a partial adjustment that adjusts the contrast of dark areas. However, all of them are based on known techniques.
tt can be used. The following figures show the relationship between exposure amount and fill density.The horizontal axis shows the input light amount and the IN axis shows the output light amount. In one case, the dotted lines indicate the state after each gradation adjustment.

The signal that has undergone gradation adjustment is applied to the brightness modulation terminal of the IS8 tube 3/ via the R, G, B signal selection switch 1.

Is this switch controlled by the control unit? The switching destination is synchronized with the switching of IL, G, B filter J2, and R, G, B
C) - the corresponding circuit during any exposure time! It is installed to connect to the Ss pipe.

The R, G, and B filters n are switched by a paper switching motor B according to control 1 of the control section M. Also, the camera V has good resolution.
Use a large one, and the film size is 4 x 41.
Since 1 to tx size film is used, the resolution can be significantly improved compared to l≦Parrot and H Nippou films. Further, the camera n is provided with a shutter 1, and under the control of the control section 36, the images R and G are taken.

The configuration is such that the shutter 1 is set to 15 when switching the B filter j2. FIG. 7 is a diagram showing an example of the exposure of R, G, and B signals and the operation of the filter.

In the figure, the exposure of the R, G, and B signals is shown in the operation of the (B) company filter.In the example in Figure 7, the R signal is exposed once, the G signal is exposed once, and the Exposure of signal J@
I'm doing it. It is a top view which shows the structure of rw-th R, G, B filter n. As shown in the diagram, a K 110 filter is provided in addition to the R, G, and B filters.
This ND filter is used in 11 when a black and white film is obtained. That is, it is also possible to select the vhG signal, which has the widest frequency band among the It, G, and B signals and is closest to Y, and shoot a black and white film through this ND filter.

As explained above in detail, according to the video image photographing device of the present invention, the lack of scanning lines inherent in television signals can be solved by interpolation, and R, G,
If the gradation of the B signal can be adjusted independently, the tone and gradation of each color can be adjusted using K so that the number of exposures can be selected.

The company uses the best image quality film for producing printed matter from television signals because it uses separate light for the B signal to eliminate misalignment and obtain superior resolution. In addition, the interpolation calculation circuit is configured with a logic circuit composed of elements suitable for high-speed processing, and by increasing the calculation speed, the time required for photographing can be reduced, and the television can be It has been possible to develop a practical machine that creates printing films from signals, and the effects of this have been greatly expanded.

The present invention can be applied not only to cameras but also to other uses other than printing when a photograph for printing is taken from a television signal. Further, although the present invention is intended for direct photographing onto film, it goes without saying that it can also be applied to direct hard copying. Furthermore, the human-powered signal is not limited to a television signal, and may be any other type of image signal.In the present invention, the case where one scanning line is added to form a single line is described, but the number of lines is arbitrary. Set it to . However, if, for example, n scanning lines are added, the numbering frequency of one converter in one direction of scanning needs to be the frequency of n+l of the color image carrier wave.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the video image photographing device of the present invention; FIG. 2 and FIG. A block diagram showing the calculation circuit, Fig. 3 is an explanation of the video shooting method of the YSS tube, Fig. 4B! 1
Figure 1 is an explanatory diagram of the floor adjustment method, Figure 7 is a diagram showing an example of R, G, and B signal exposure and filter operation, and Figure 1 is a diagram showing an example of R, G, and B signal exposure.
, B is a plan view showing the configuration of the filter. Core a, Kob, Ko0...Frame image -, Ja, Jb
. 70--Interpolation calculation unit, sa, sb, zo-gradation adjustment S
. 7... Photography department, J/-7MS tube, 32-R, G
, B filter. Patent applicant: Dai Nippon Printing Co., Ltd. Applicant: Ikegami Tsushinki Co., Ltd.

Claims (1)

[Claims] 1 *1 - In creating a color film of the image from the image signal, the three primary color signals of the color image are transferred to a high-resolution 7-line dust spot scanner tube with a white phosphor. A method for photographing a video image, characterized in that the sequentially projected images are exposed on each W4 film through a J primary color filter. L. The method of photographic manipulation of a video image according to claim 0, characterized in that the number of exposures of each image is arbitrarily set according to the light wavelength characteristics of the seven twin-spot Yarner tube and the film. . & The image is created using three primary color signals that display a high-resolution Flying Sporatus medium that also has white phosphors in one tube! In a film production device, a color film is exposed to light by number using primary color filters, and the number of exposures can be set arbitrarily depending on the light wavelength characteristics of the Flying Sporato Yarn tube and the film, and a 111KII adjustment circuit is provided for each color. , a gradation adjustment method characterized in that the gradation can be adjusted independently for each color according to the light sensitivity characteristics of the color film. This is a device that creates a color film of 7 OII images from color dual image signals, and includes an interpolation calculation section that improves the image resolution and the ability to adjust the gradation of each color independently according to the light sensitivity characteristics of the film. It is characterized by comprising a gradation adjustment section, and a photography section consisting of a high-resolution 07 twin spot scanner tube with a white phosphor, three primary color filters, a monochrome OND filter, and a camera. A photographic device for video images.