JPS62117484A - Input picture processor - Google Patents

Abstract

PURPOSE:To perform a color rounding processing in a real time by providing a means for converting and sending picture data including optional number of colors into data of a compression bit and a means for transmitting the data capable of being expanded to the number of the bits before the compression. CONSTITUTION:A color video signal from an input terminal 1 is converted into digital picture data of four bits every picture element in an A/D converting circuit 2 and inputted to a color rounding means 3. Color rounding data of the four bits corresponding to the color picture of 12 bits in the sum is stored in respective addresses in the color rounding means 3. Color data of 12 bits in the sum of the respective 4 bits for R, G, B corresponding to the color rounding data is stored in a color data expanding means. The data selected from the means 3 is stored in a picture memory 4 and written in an FD 10 through a CPU5. The data is fethed by the means 6 from the means 3 or the memory 4 and expanded to original number of colors through a D/A 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an input image processing device suitable as an input means for image information used in teletext broadcasting, a captain system, and the like.

[Technical background and problems]

In information transmission systems called videotex, such as teletext and captain systems, color image signals that include the number of natural colors (for example, 4096 colors) are used based on restrictions due to the transmission band and requests for compression processing of information data. It is necessary to compress (hereinafter referred to as "color rounding") into image data having several different numbers of colors (for example, 16 colors).

The conventional means of performing this kind of color rounding processing are:
For example, there is a system in which line drawing data obtained by drawing on a tablet board, an image scanner device, or a black and white television camera is loaded into an image memory, and the line drawing data is subjected to computer processing to color the area.

However, with this method, if you try to create an image with a somewhat complex shape, apart from a simple image, it requires a lot of troublesome labor and several hours of processing time, and large computers cannot handle the above-mentioned problems. Since the processing time is dedicated to this purpose, there is a problem in that the large computer cannot be used effectively.

Recently, a color television camera is used to take images containing natural colors, which are processed and stored in image memory, and then color rounding processing using a predetermined algorithm is performed on this color image data. A system has also been proposed in which the contents of the image memory are rewritten so that the image data contains several types of color information suitable for transmission, etc., and even images with complex shapes can be processed in a few minutes. It has become to.

However, even in this case, color rounding processing must be performed on each memory element of the image memory, and a certain amount of waiting time is always required until an optimal image is obtained. As the number of pixels increases, the problem arises that the color of each pixel cannot be changed instantaneously.

C FI aspect of the present invention] The object of the present invention was made in view of the shortcomings of the prior art, and is to provide color rounding processing for images containing a large number of colors, such as the number of natural colors. An object of the present invention is to provide an image input processing device that can sequentially perform operations to obtain an optimal image, and can also restore an image including the original number of colors based on the optimal image.

[Essentials of the present invention]

The outline of the present invention is to take digital image data of arbitrary bits obtained by A/D converting an image signal including an arbitrary number of colors into σ for each pixel, and to rewrite the digital image data with fewer bits than the above-mentioned number of bits. color rounding means for converting into image data of possible compressed bits and sending it; and color data for sending out image data that can be expanded to the number of bits before compression and can be rewritten in association with the image data of the compressed bits. The invention lies in that the input image processing device is configured to have a developing means.

[Example of the present invention]

Examples of the present invention will be described in detail below.

FIG. 1 shows a first embodiment of the present invention, and the device shown in the figure inputs a red (R) signal, a green (G) signal, and a blue (B) signal from a color television camera. An input terminal 1 consisting of three terminals 1a, lb, and lc for
(Analog-digital) 4-bit configuration A/
An A/D converter 2 consisting of D converters 2a, 2b, and 2c;
The digital image data of a total of 12 bits (4 bits each) sent from this A/D converter 2 is stored in a RAM (
A color rounding means (table) 3 configured using 4 words x 4 bits) and an image memory (256 words x 4 bits) capable of storing 4 bit output data from this color rounding means 3 for every l frame. 4 bits) 4, a CPU 5 which reads l frames of data stored in the image memory 4, converts it into a predetermined format, and sends it to an external storage means such as a floppy disk 10, R, G,
Color data configured using a RAM (16 words x 12 bits) with a 4-bit input data line and a 12-bit output data line that can write 4 bits of each color information of H for a total of 12 bits. D/A conversion consisting of a developing means (table) 6 and D/A converters 7a, 7b, and 7C that convert 4-bit R, G, and B output data from the color data developing means 6 into analog signals, respectively. 7 and an output end 8 consisting of terminals 8a, 8b, 8c for sending analog signals from the D/A converters 7a, 7b, 7C to a color television monitor (not shown). ing.

Incidentally, data loading and data reading for the color rounding means 3, image memory 4 and color data developing means 6 are controlled by control signals from the CPU 5. Also.

The rewriting of the color information of each pixel iσ in the color rounding means 3 and the rewriting of the output data in the color data car (interference means 6) are performed by the CPU 5 based on the color designation signal from the input means 9 such as a keyboard. This is done by a rewrite command that is sent out.

Next, the operation of this device having the above configuration will be explained.

The R, G, and B signals from the color TV camera are connected to terminal 1.
When input from a, lb, lc to each A/D converter 2a, 2b, 2c, each A/D converter 2a, 2b, 2c converts the respective human input signal into A/D and outputs 4 bits in total. The data is input to the color rounding means 3 as 12-bit color image data (including 4096 colors). Each address of the color rounding means 3 stores 4-bit color rounding data corresponding to a 12-bit color image.

The color data development means 6 stores a total of 12 bits of color data of 4 bits each for R, G, and B, which corresponds to the 4-bit color rounding data, and the image is color-rounded and color-developed for each pixel. By sending and displaying the image on a color television monitor (not shown), a color rounded image having 16 colors can be obtained. In this state, while watching the color television monitor, a rewrite command is sent to the address of the color rounding means 3 corresponding to the pixel whose color is to be changed, and the pixel is rewritten with 4-bit data arbitrarily selected from among the 12-bit data.

This allows you to instantly change the color of that pixel.

After performing such a procedure on desired pixels of the image displayed on the color television monitor 1- to create an image having 16 representative colors among the colors of the input image,
This image data is stored in the image memory 4 -LL.

By writing this image data to the floppy disk 10 in a predetermined format via the CPU 5, it is possible to create an information source that can be used as image data for teletext broadcasts and captain systems.

On the other hand, the color data development means 6 takes in image data of 4 bits for each pixel from the color rounding means 3 or the image memory 4, and based on this, according to a predetermined algorithm, 4 bits each for red, green, and blue, for a total of 12 bits. The stored data are sent to D/A converters 7a, 7b, and 7c, respectively. This makes it possible to develop a 16-color image into a 4096-color image.

Note that the color of the output data initially set in the color data development means 6 does not necessarily have to be the same color as the color included in the image data from the color rounding means 3 or the image memory 4.
For example, if an image drawn in green is to be displayed in red, this can be easily done by simply overwriting the output data of the color data development means 6.

The D/A converters 7a, 7b, 7c are color data developing means 6.
Convert the output data from each to an analog signal.

As a result, the color television camera can simultaneously reproduce in real time a color image having 16 colors and a total of 4096 colors.

FIG. 2 shows a second embodiment of the present invention, and in the drawing, parts having the same functions as those of the first embodiment shown in FIG. Omitted.

The difference between the device shown in FIG. 2 and the device shown in FIG. 1 is that N
An input terminal 11 and an NTSC decoder 12 to which an image signal from a TSC camera can be input are provided.
R from the output of the TSC decoder 12 and the input terminal -1
, G, and B signals, a gain controller 14 that can adjust the color density of each of the R, G, and B signals, and a color rounding means 3 for the image memory 4. In addition to supplying the output data of the image memory 4 to the color rounding means 3, it also supplies the output data of the image memory 4 to the color data development means 3, and also supplies it to the second switch 15 arranged at the rear stage of the color data development means 6. The output data and the output data of the image memory 4 are switched at any time and sent to the D/A converter 7.

According to the apparatus shown in FIG. 2 having the above configuration, NTSC
The color image signal of the system and the color image signal consisting of R, G, and B signals can be selected by the first switch 13 and used as the input image signal, and the density can also be adjusted by the gain controller I4. , it becomes possible to use this device more effectively.

In addition, since the image data digitized by the A/D converter 2 is stored in the -43- image memory 4, this image data is once stored in the floppy disk 10 via the CPU 5 and then read out again. The color rounding means 3 can be supplied to the color rounding means 3, thereby making it possible to have time for the color rounding process as described above and the subsequent image data development process, thereby further enhancing the excellent practicality of this device. I can do it.

Furthermore, since the output data from the image memory 4 and the output data from the color data expansion means 6 can be switched by the second switch 15, an image based on the output data that has been subjected to color rounding processing and expansion processing. It is also possible to clearly understand the processing status by comparing an image based on image data that does not undergo these processes on a color television monitor.

The image data subjected to color rounding by the color rounding means 3 and the image data subjected to expansion by the color data developing means are stored in a predetermined format on the floppy disk 10 via the CPU 5, and are read out respectively. Of course, it is also possible to perform further color correction and display the image.

The present invention is not limited to the embodiments described above,
Various modifications are possible within the scope of the gist. for example,
In the above-mentioned embodiment, a case has been described in which 4096 colors are rounded into 16 colors and then expanded into 4096 colors, but the apparatus according to the present invention is not limited to this, and the device includes color rounding means, color data expansion means, etc. By appropriately changing the number of bits used, the combination of the number of colors can be set arbitrarily.

In addition, in the above-mentioned embodiment, a case has been described in which 12-bit color image data is stored in the color rounding means and the color is changed by rewriting the 12-bit color image data 4 bits at a time. It is also possible to divide the output data into one frame λ1 and automatically round the colors into 16 colors using a predetermined algorithm.

Further, in the above-described embodiment, a case where a color image is used as an input image has been described, but for example, it is also possible to perform gradation processing involving 12 gradations on data of a monochrome image.

Application examples of the present invention include data compression when saving color images on personal computers, etc.
An extremely wide range of applications can be expected for various information devices that perform data compression.

[Effects of the present invention]

According to the present invention described in detail above, it is possible to perform color rounding processing on an image containing a large number of colors in real time so as to obtain an optimal image, and it is extremely useful for creating an image information source suitable for information transmission. It is possible to provide an input image processing device that can bring about excellent practical benefits.

Further, according to the present invention, since it is possible to easily restore an image having the original number of colors from an image that has been color-rounded, it is possible to provide an input image processing device with extremely high practical value.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention;
The figure is a block diagram showing a second embodiment of the present invention. 2--A/D conversion section, 3--color rounding means, 6...
Φ Color data expansion means. Patent applicant Nippon Television Broadcasting Network Co., Ltd. Videotron Co., Ltd. Agent Patent attorney Tomi Shimoyama-L
Continued Neyama 211mi ga 1 (Method) 1986
March 14, 2013 El Patent Application 1986-258416 L, j 2. Name of invention input image processing head attachment 3. Relationship with the case of the person making the amendment Patent Applicant Residence 14 Niban-cho, Chiyo ITI-ku, Tokyo Name Japan Television Broadcasting Network Co., Ltd. (1 other person) 4, Agent 107
Sara (404) 1959 Address 91111 Akasaka, Minato-ku, Tokyo
No. 7 - Hidekazu Residence No. 219, J, (B”z Name
Patent Attorney (8052) Shimoyama Fujio 1 So゛,)'-\
I? 5. 11-1 of the amendment order 1985 I Jl 2811 (Despatch 11) 6. Subject of amendment (2) i' Column 7 of drawing J, contents of supplementary IF Submit appropriate drawings and authorize the applicant I will submit a letter. 8. List of attached documents (1) Power of attorney (2 copies) (2) Drawing (1 copy) 9. Person making amendments other than the above Address 4-14-23 Motohongo-cho, Hachioji-shi, Tokyo Name Videotron Co., Ltd.

Claims (3)

[Claims] (1) An image signal containing an arbitrary number of colors is A for each pixel.
color rounding means for taking digital image data of arbitrary bits obtained by /D conversion and converting it into image data of compressed bits which is less than the number of bits and is rewritable, and transmits the image data of compressed bits; and an image of the compressed bits. 1. An input image processing device comprising: color data expansion means for transmitting image data that can be expanded to the number of bits before compression in association with data and is rewritable. (2) The color rounding means captures one frame of image data of arbitrary bits for each pixel, stores it, and converts all bit information of each pixel into compressed bits smaller than the number of bits and all bit information. The input image processing device according to claim 1, which is configured to be able to optionally rewrite and send out the image. (3) The compression bits are 4 bits, and the bit before compression is 1
An input image processing device according to claim 1 or 2, wherein the input image processing device is 2 bits.