JPS61210779A - Video tex picture forming device - Google Patents

Abstract

PURPOSE:To make intentional weighting to a leading object of a picture by selecting N colors from an area and parts of specific color designated by an external inputting device that designates a position on a picture successively from colors of higher frequency of appearance in inputted picture data. CONSTITUTION:Information at a designated position and an area is read out from a buffer RAM 501, and higher rank 16 colors are selected from a histogram prepared by a selector circuit 505, and these 16 colors are stored in a color pallet memory 506. Video data expressed in 16 colors, that is, expressed by address data of the color pallet memory 506 are formed and written in a video RAM 507 from the selected 16 colors on all data for one picture of the buffer RAM 501. Then, this is supplied to an encoder 508 of NAPLPS system and converted to codes expressed as graphic codes and layer codes, and the codes are stored in a buffer RAM 509, and sent out to a transfer line, for instance a telephone cable, through a modulating circuit 510.

Description

[Detailed description of the invention] The invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example G1 Description of Videotex imaging device (FIG. 1) G2 Explanation of automatic definition of color palette (Fig. 2) Explanation of manual correction of G3 color palette (Fig. 3, Fig. 5) Explanation of 04 function block diagram (Fig. 4) H Effect of invention A Industrial application field The present invention relates to a videotex image creation device, and more particularly to a technique for coloring the image.

B. Summary of the Invention This invention provides an input color il! II Create converted video data that expresses the color of this human-powered color image data using N colors, for example, 16 colors, which are fewer than M colors, for example, 4096 colors, that can be expressed with II image data, and encode the image (line information) of this converted video data. In the Videotex image creation device that creates Videotex image data for transmission, the N colors listed in - are selected in descending order of the frequency of appearance of the colors in the human image data (III! I1 song man). , 1il
I From the appearance frequency of colors in all image data for 11 pages, N
Rather than determining the color, the screen is specified by an external human device that specifies the position of the area and the part of the specified color.
Intentionally colorize images by selecting colors
It was designated as J-Noh.

C. Conventional technology There are NAPl and PS methods as display methods for Videotex. This method converts image components into points (Paint
), line, arc, rectangle (R
ectangle), polygon (Polygon), and display information (attribute control commands) that specifies numerical values such as size, position on both sides, color, etc. The graphic information and display information are encoded and transmitted, and the terminal side decodes these codes and converts them into dot patterns for display.

According to this NAPl, PS method, the transmission I! ! II image information amount It becomes possible to reduce the total information amount, and image transmission with high transmission efficiency is possible.

By the way, when encoding color image information into such videotex image information, first, the input color video signal is digitized dot by dot, and encoding processing is performed based on this. In this case, if the I dot is represented by the three primary color signals R1G and B of red, green, and blue, and each of these primary color signals is digitized with 4 bits, the image will be 409
It may contain six colors. However, transmitting all of these 4096 colors as information would result in a large amount of information, so the Videotex image creation device
Normally, for example, 16 colors are used as display colors, and after the 4096 colors of both original color images are assigned to the 16 colors, the encoding process is performed.

Although these 16 display colors can be fixedly determined, there is a possibility that the color J frequency of the original color image information may be impaired. Therefore, the applicant previously proposed a method for automatically determining these 16 display colors based on original color image information (see Patent No. 1, No. 8, dated November 30, 1980).

This is a method in which the top 16 colors are selected as the colors for each dot of one screen's worth of color image information in descending order of application frequency.

D Problems to be Solved by the Invention However, when display colors are selected from all the color information on one screen in this way, it is not possible to intentionally suspend the central object of the image, and unnecessary The disadvantage is that many colors are used in certain parts.

For example, if the image is a person image as shown in FIG. 5, the background portion of the person is completely unnecessary for the purpose of representing the person's characteristics. However, since this background part occupies a large area of the screen, the frequency of applying colors is high in this part (and the color of this background part is selected as the display color, so it is difficult to reproduce important parts of people in detail. In some cases, necessary colors are not selected for this purpose, resulting in a different impression from the original image.

E. Means for Solving Problems This invention uses a microcomputer and a monitor receiver (
512), a memory (507) that can store input video data for one screen, and an external human power device (502) that can specify the position on the screen of the monitor receiver (512) that corresponds to the address of this memory (507). ), a means (504) for determining the appearance frequency of a color in the image data within the area specified by the external human-powered device (502), and a means (504) for determining the appearance frequency of the color F? means (505) for selecting the top N colors from the colors that appear more frequently based on the output information of t (504);
Means (513) for forcibly setting the color of a specific image portion designated by an external human power device (502) as one of the colors in the table above; Means for creating converted video data expressed in color (50
6) (507) and an encoder that encodes the image information of this converted video data and converts it into transmission data.
- code means (50B').

F Function For example, in the person image shown in FIG.
In step 4), the appearance frequency of the color of only this person part is calculated, and the top N colors are selected in order from the color with the highest appearance frequency (505).
Selected by After that, when the external input device (502) is used to determine, for example, the lip part, the eye part, etc., the lip color and eye color are replaced with, for example, the lower two colors of the selected N colors, and the N colors are changed. be re-elected.

G Example G1 Description of Videotex Imaging Apparatus FIG. 1 shows an example of the apparatus of this invention. In this example, the apparatus is a manual color II! It consists of a frame data creation section (100) that converts IiO & information into data for each screen, and a videotex device section (200) that creates videotex image data from the data for each screen.

In the frame data creation section (100), (101)
is an analog color video signal input terminal, and an NTSC color video signal from a color video signal generation source (10) such as a video camera, VTR, or video disc is passed through this input terminal (101) to an NTSC decoder (102).
The three primary color signals R, G, and B are obtained from the three primary color signals R, G, and B.

In addition, (103) is the input terminal for the three primary color signals R, G, and B.
A source (20) of three primary color video signals R, G, B from an image information generating device such as a microcomputer is connected to a frame data generating unit (100) through this input terminal (103).
) these three primary color signals are input.

The three primary color signals from the NTSC decoder (102>) and the three primary color signals from the input terminal (103) are selected and extracted by the input selection circuit (104), and the selected output is supplied to the A/D converter (105). This A
In the /D converter (105), 3
The primary color signals R, G, and B are each converted into 4-bit data and one sample (one dot) is converted into a 12-bit digital signal. This 12-bit digital signal is supplied to a field memory (106) and written into this memory (106) one field at a time.

Writing and reading of this field memory (106) is performed by the Videotex equipment unit (200) as described later.
This is performed based on instructions from the microcomputer (201). Furthermore, switching of the input selection circuit (104) is similarly performed by a command from the Videotex device section (200). (108
) is a timing control circuit for controlling the timing.

Therefore, a signal for one field is obtained from the field memory (106), which is returned to the analog three primary color signals R9G and B by the D/A converter (107), and this is sent to the selector of the Videotex device section (200). The image is supplied to the monitor receiver (230) through (231) and displayed on the screen.

A microcomputer (201>) is provided in the Videotex equipment section (200).

That is, (202) is its CPU, (203) is a ROM in which a data processing program as described below is stored, and (204> is the R for the work area.
It is AM. Furthermore, (205) is a data bus.

Further, (211) is a buffer RAM for taking in 1' dot 12-bit digital data from the frame data generating section (100).

(2) 2) is a conversion of one screen worth of data loaded into this buffer RAM (231) into data representing the color of each dot using a 16-color color palette created as described below. A video RAM in which digital video data is stored. In this case, this video RAM (212) includes a frame data creation section (100).
) In addition to the video data from ), there is also a command menu (230M) for displaying multiple commands to perform the desired processing on this video data on screen 1 as shown in Figure 5. Menu data is stored.

<2]3) is a controller for this video RAM (2]2), and each is connected to a data bus (205).

(214) is a color palette memory, which contains video data of 16 colors set as described later, that is, 3
Data representing primary color signals R, G, and B each as a 4-bit digital signal is stored for 16 colors.

Further, (215) is a RAM that stores data converted from the converted digital video data stored in the video RAM (212) to a NAPLPS PDI code consisting of a geometric figure code and its attribute code.

(216) is a tablet as an external input device, and this tablet (216') is a coordinate input device for specifying a position on the screen of the monitor receiver (230).

The coordinate input device ζ may be a so-called mouse or other input device instead of a tablet.

When one command from the aforementioned command menu is selected on this tablet (216), that command is executed. That is, the video RAM (
21, 2) can be specified on the tablet (216) with a stylus, and the position on the screen specified with the stylus is displayed on the screen by a cursor. This tablet (216)
connects the data bus (
205).

(217) is a floppy disk, RAM (215)
11I remembered in! The NAPLPS code for each blood fraction is stored and read out from the code, and this is also connected to the data bus (205) via the interface (222).
There is ζ.

(21B) is a modem, and the NA of RAM (215)
By changing the PLPS code, for example, it is possible to send data through an IM telephone line, and this also requires an interface (
It is connected to a data bus (205) via a data bus (223).

And (220) is a frame data creation unit (100)
An interface for importing one screen worth of digital video data from a data bus (
The video data supplied to the buffer RAM (205) is stored in the buffer RAM (205).
211) as raw data.

Explanation of automatic definition of G2 color palette In the Videotex device configured as above,
1 which can express 4096 colors from the frame data creation section (100) according to the flowchart shown in FIG.
Color image data expressed in 16 colors is created according to a color palette set for 2-bit video data.

That is, first, the videotex device (
200), one screen worth of video data is taken into the data bus (205) via the interface (220) according to the command selected on the menu (230M) by the tablet (216) (step (301)
) ).

The data captured in this way is stored in the buffer RAM (211
) and temporarily stored (step (302)
).

Then, write this buffer RAM (211) as follows.
All of the data for one meat surface is used to automatically assign 16 display colors, and the conversion data created based on the 16 selected colors is written to the video RAM (212) (step (303)).

That is, from the data taken into the buffer RAM (211,), the appearance frequency of each color for each dot is determined as ROM (2(+
3) Digital video data of the top 16 colors in descending order of frequency (12
bit) is written to the color bullet memory (214).

Thus 1. 16 automatically selected from the full screen image data stored in the color bullet memory (2]4)
The color data recolors each dot of the data in the buffer RAM (2]1).

In this case, the information of each tote is stored in the buffer RAM (212
) is converted into data of one of the 16 colors in the color bullet memory (2+4) that is closest to the original color of the video data. Then, data corresponding to this recolored video data is written into the video RAM (212) as data for each dot.

The data stored in this video RAM (212) is 12
It is not the bit video data, but the address data (4 bits) of the video data of the color to be converted in the color palette node memory (2]4). Thus, video R
In the AM (212), converted video data of 1 dot and 4 bits is written in contrast to the raw data of 1 dot and 12 bits I in the buffer RAM (211).

Then, on the tablet (216), the recolored image is displayed on the tablet (216) in the command menu (230M) displayed at the bottom of the screen of the monitor receiver (230), as shown in FIG. When a command is selected, the selection circuit (231) is switched to the state opposite to that shown in the figure.Then, the controller (
213), address data for specifying the color of each dot is sequentially read out from the video RAM (212) in the horizontal and vertical directions, and the selected color data (i.e. A signal in which the three primary color signals R, G, and B are expressed in 4 bits is obtained, which is returned to an analog signal by the D/A converter (233), and this analog three primary color signal R,
G and B are connected to the monitor receiver (2) via the selection circuit (231).
30), and the recolored image is displayed on the screen.

At this time, the menu (230M) stored in the RAM (212) can also be displayed on the screen.

In this way, the newly recolored image created based on the color bullet created from the full screen data will be displayed on the screen of the monitor receiver (230).

Next, it is determined whether manual correction is necessary (step (304)). When the user determines that correction is necessary by looking at the display screen, the user selects the menu on the tablet (216) as shown in Figure 5. Move the stylus so that it is displayed and issue a correction command. Then, it is determined that correction is necessary, and the device enters manual correction mode (step (305)).

After looking at the screen, if manual correction is not necessary, a command for processing the next image data is hit on the tablet (216), and the definition of the color barre node is completed.

G3 color bullet manual (W jE explanation 4th
The figure is a flowchart of manual correction.

In this manual correction mode, you can specify the area you want to place particular emphasis on when specifying the color palette, and you can also use a specific color within that meat elephant as one of the colors in the color palette. Equipped with functions.

First, it is determined whether an area to be colored has been designated (step (401)).

When the user wishes to specify an area, he or she selects, for example, the MASK command from the on-screen command menu (230M) using the stylus of the tablet (216). Then, in step (216), the portions not used for defining the color palette, such as the background portion of the portrait on the screen shown in FIG. 4, are filled in with the stylus. Then, the address of the buffer RAM (211') of the portrait part other than the filled-in part is specified, and the digital video information of the portrait part is read from this buffer RAM (211), and this digital video A histogram of the frequency of appearance of each dot of information is created again (step (402)). Then, the frequency number obtained from the created histogram is superimposed on the frequency number of each color automatically selected from the entire screen information, and the top 16 colors of the superimposed ones are reselected (step (403) 'I.

In this way, the color palette is re-created 11 times from only the color image information of the person's face and the person's head other than the background part, and the color palette memory (214
) is loaded with the re-created 16 color data.

Then, this newly defined color palette 1- is displayed in the first and second part of the menu (230M) at the bottom of the screen in FIG. 5 mentioned above. At this time, the color arrangement order is also changed according to the histogram.

In addition, the screen also has a newly created color palette.
Video RAM (21
The image becomes an image whose color tone can be changed according to the data of 2).

Furthermore, if you look at this image and want to change it to the original image color, for example if a specific color part is different from the original image, such as the color of the lips or the color of the eyes, you can change the color of the specific color part. It can be added as one of the 16 colors in the color palette as follows. In this case, in order to compare the difference between the original screen color and the created screen color, by hitting the command menu (230M) with the stylus on the tablet recorder 1 (216), the selection circuit (231) is switched and the frame data is The original image color from the creation unit (100) and the recolored video RAM (212) lI! I
This means that colors based on I image data can be compared.

Then, it is determined whether a command to add a specific color to the color valent has been selected on the tablet (21B) (step (404)). Tablet (216)
When that command is clicked on the command menu (230M), the process advances to step (405) and a mode for adding a specific color is entered. In step (405), the selector (231) is set to the state shown in the figure, and the image from the original frame data creation section (100) is displayed on the screen of the monitor receiver (230), or the newly created image is displayed. , hit the area to which you want to add the original specific color, for example, the lips. Then, that address is stored in buffer R.
The color palette is specified in the AM (211), and the 12-bit video data taken out from this buffer RAM (211) is stored in the color palette memory (211), for example.
14) is replaced with the video data with the lowest frequency, and the selection of the 16 colors is redone. If you want to add eye color, use a tablet (
Similarly, if the user tips the stylus at step 216), video data of the original color of the eye color will be forcibly defined as one of the 16 colors in the color palette memory (214). The above is step (4 (15)
and step (406).

From the 16 colors reselected in this way, the °ζ buffer R is
Video data consisting of 16 colors is created for the data of AM (211), and this is stored in video RAM (212).
) (step (407
)), an image based on the data stored in the video RAM (212) is displayed on the screen of the monitor receiver (230).

At this time, instead of using all 16 colors, among the 16 colors,
For example, the video information in the video RAM (212,) can be created using 14 colors. In that case, the tablet (216) may be used to select the color to be used from among the 16 colors displayed on the menu (230M).

If the modification is completed as described above (step (408)), the modification mode is completed and the definition of the color palette is completed.If the modification is not completed, steps [401] to (407) are repeated.

In this way, data equivalent to color video data expressed using 16 colors or less than 16 colors is loaded into the video RAM (212).

The data from Miko's video RAM (212) is transferred to the microcomputer (201) (7) ROM (20
According to the program in 3), it is encoded into a NAP LPS code consisting of a figure code consisting of the five types of basic geometric figures mentioned above and an attribute code indicating color, size, coordinate position, etc. The code is written to RAM (215). In addition, optionally through an interface (222), this NA
Image data of PLPS:J-1; is stored on the floppy disk (217) as a data image file.

When a send command is issued on the tablet (216), the NAPLPS code 1'' created in this way is sent to the modem (218), modulated, and sent through the telephone line.

Note that the areas where you can specify the part you want to replace with the original color can range from 6 colors that can be defined as a color palette to 16fIIll areas as a matter of course.

゛ Furthermore, in the mode of specifying parts unrelated to the color palette definition, it is possible to specify a specific original color even for areas excluded from the color palette definition.

Explanation of G4 Functional Block Diagram FIG. 4 is a block diagram showing the functions according to the flowchart explained above.
The input digital video signal from 0) is input to the input terminal (500).
is input and supplied to the buffer RAM (501), and the address of this buffer RAM (501) is specified by the external input device Tabreso (502) via the addressing circuit (503). Information within the location and area is read out from the buffer RAM (501), and a histogram is created from the read information in a histogram creation circuit (504). Then, the top 16 colors are selected from the created histogram in a selection circuit (505), and the 16 colors selected by this selection circuit (505) are stored in a color palette memory (506). Then, all the data for one screen direction in the buffer RAM (501) from the selected 16 colors is expressed in the video RAM (507) with 16 colors, that is, the color bullet memory (50
6) The video data expressed by the address data (4 bits) is formed and written, and this is the NAP L
The data is supplied to a PPS encoder (508) and converted into a code expressed as a graphic code and an attribute code, and the code is stored in a buffer RAM (509). It is then sent out to a transmission line, for example a telephone cable, via a variable circuit (51(1)).

Additionally, a 4-bit signal from the video RAM (507) is supplied as an address to the color palette memory (506), and the three primary color information for each dot is read out from this color palette memory (506), which is then sent to the D/A converter (506). 511) into an analog signal, and the analog signal is supplied to a monitor receiver (512) and displayed on its screen.

Also, when a specific screen area is hit on the tablet (502), that address is specified and that area is read out from the buffer RAM (501), and the data is taken into the specific color setting circuit (5) 3). , the data is supplied to the N color selection circuit (505), where it is forcibly defined as one of the 16 colors, and written into the color bullet memory (506). Therefore, this specific color is forcibly set as one of the 16 colors, and the information in the video RAM (507) is thereby rewritten again.

Although we did not explain how to define a color palette from one screen's worth of information, as mentioned above, the histogram creation circuit (504) uses a tablet (which is an external input device).
502), when no area is specified, a histogram is created based on the information on the planning surface, and the color palette is of course automatically defined.

〔Effect of the invention〕

As described above, according to the present invention, not only the display colors that define the color palette are selected from the entire screen information for one screen, but also the area that the user wants to emphasize can be designated as an area. Since it is possible to define a color palette and also define a specific original color of the original image as one color of the color palette, it is possible to create a video text image that is colored according to the user's wishes. It is possible to do so.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an example of the device of this invention, FIGS. 2 and 3 are flowcharts of its operation without blanks, FIG. 4 is a block diagram of the functions of this device of the invention, and FIG.
The figure is a diagram for explaining an example of a display screen. (201) is a microcomputer, (230) is a monitor receiver, (211) is a buffer RAM, (212) is a video RAM, (214) is a color palette memory, (
216) is a tablet.

Claims (1)

[Scope of Claims] (a) a microcomputer; (b) a monitor receiver; (c) a memory capable of storing input video data for one screen; and (d) the monitor receiver corresponding to the address of this memory. an external input device that can specify a position on the screen of the machine; (e) means for determining the frequency of appearance of a color in image data within an area designated by the external input device; and (f) means for determining the frequency of appearance. (g) forcibly setting the color of a specific image portion designated by the external input device as one of the display colors; (h) means for creating converted video data expressing the input video data in the N colors or less; and (i) encoding for encoding the image information of the converted video data and converting it into transmission data. A videotex imaging device comprising means.