JPH0316386A - Color picture superimposing device - Google Patents

Abstract

PURPOSE:To attain simultaneous display of eight colors by outputting luminance information of a designated color for each picture element based on red, green and blue luminance information for each picture element and a color control signal designating a color for each inputted picture element externally. CONSTITUTION:A luminance information storage means 5 stores binarized red, green and blue luminance signals for each picture element as to one picture in the scanning order for each color respectively. Then a luminance information output means reads the luminance information stored in the luminance information storage means 5 for each color in the order of scanning and outputs the information to a luminance information synthesis means 307. The luminance information synthesis means 307 outputs the luminance information as to the designated color for each picture element based on the red, green and blue luminance information for each picture element outputted from the luminance information output means and a color control signal designating the color for each externally inputted picture element. Thus, simultaneous display of eight colors is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a color image superimposing device.

<Prior Art> Conventionally, there are color image superimposing devices as shown in FIGS. 4 and 5, for example. FIG. 4 is a block diagram showing the circuit configuration of the device, and FIG. 5 is a block diagram showing details of the control section shown in FIG. 4.

In Fig. 4.5, the luminance signal "Y CAM" manually input from the camera circuit is binarized by the A/D converter 4l and input to the controller 42. This luminance signal is
This is a signal representing the brightness of each pixel of one screen divided into 56 pixels in scanning order, and is binarized for each pixel. The luminance signal binarized by the A/D converter 41 is converted into parallel data DO to D7 by the shift register 421 of the controller 42, and then stored in the memory 43. This storage in the memory 43 is performed by the oscillation circuit 44.
is synchronized with the horizontal synchronization signal HD and vertical synchronization signal VD on the camera circuit side based on the clock signal output by
Timing generator 42 to memory addresses AO to AI2 indicated by H counter 422 and V counter 423
4 write enable (WE) signal. This is performed every 8 bits according to the OE1/button enable (OE) signal.

The memory 43 uses an SRAM with a capacity of 64K, and is capable of storing luminance signals for one screen.

The data stored in the memory 43 is outputted as 8-bit parallel data to the shift register 421 by the WE signal OE signal, and converted into serial data by the shift register 42H.

This data is output to a delay circuit 425, where it is adjusted to match the signal conditions with the signal from Uiro, and then output to a color synthesizer 426.

This color synthesizer 426 includes red, green, and blue color control signals R-CTL, G-CTL,
B-CTL is manually input from the outside via the buffer 45. In addition to the above signals, a memory control signal MEM-
CTL and superimpose signal SIP-CTL are input to the control unit 42 via the buffer 45, and
An on/off signal M-on/off' of the memory 43 is input to the memory 43.

Based on the luminance data input from the delay circuit 425 and the color control signal input from the Uiro, the color synthesizer 426 generates color signals R, G, B representing the color specified by the color control signal. and YR, YG, YB, which are the luminance signals for each pixel for that color.
Then, planking signals SC-BLK and SY-BLK regarding color and brightness for image edge processing and the like are output to the outside. For example, if the specified color is white, R・l、G・
l, B・1, and the brightness signal for a pixel with brightness data '1'' is YR・l, YG=1, YB=1. Also, if the specified color is red, R・I.G・0 ,B・0
The brightness signal for the pixel whose brightness data is “B” is Y
R=1. YG=0. It becomes YB・0. Furthermore, when the designated color is yellow, R=1, G・1.8=O, and the brightness signal for the pixel whose brightness data is “l” is YR・I. ．． YG・1
, YB·0, and the brightness signal for the pixel whose brightness data is ``'0'' is YR·O, YG·0, YB=Q.

Luminance signal Y output from the above-mentioned force generator synthesizer 426
R, YG, YB and color signals R, G, B are respectively converted into a composite luminance signal SY and color difference signals SR-Y, SB-Y by a matrix 46.47, and outputted to the outside.

Problems to be Solved by the Invention> By the way, in the conventional color image superimposing device described above, only 3 bits of color information are given to the monochrome signal, so red, blue, green, white, black, cyan・Magenta・
It is only possible to display using one of the eight colors of yellow, and even if you divide one screen into multiple areas and try to display the eight colors separately for each area, it is difficult to express the subtle shading of the image. Furthermore, there was a problem in that the image reproducibility was poor, and it was virtually impossible to use and display the eight colors separately for each area.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a color image superimposing device that can display the above-mentioned eight colors by selectively using them for each area, and can therefore display eight colors simultaneously.

Means for Solving the Problems> In order to achieve the above object, the color image superimposing device of the present invention provides two images per pixel per screen.
The converted red, green, and blue luminance information is scanned for each color. a brightness information storage means for storing the brightness information stored in the brightness information storage means; a brightness information output means for reading and outputting the brightness information stored in the brightness information storage means for each color in scanning order; and a luminance information synthesizing means for outputting luminance information about the color specified by the pixel source based on the luminance information of green and blue and the color control signal inputted from the outside and specifying the color for each pixel. It is characterized by the fact that it is equipped with

Function> The brightness information storage means stores 2f for each pixel on one screen.
The converted red, green, and blue luminance signals are stored in scanning order for each color. And the brightness information output means,
The brightness information stored in the brightness information storage means is read out for each color in scanning order and outputted to the brightness information combining means. This luminance information synthesis means selects a pixel based on red, green, and blue luminance information for each pixel output from the luminance information output means and a color control signal inputted from the outside and specifying a color for each pixel. Outputs brightness information for each specified color.

For example, red brightness information is represented by YR, green brightness information is represented by YG, blue brightness information is represented by YB, and for all pixels YR,
Represented by YG and YB. When a pixel is designated as yellow, YR and YG are output as they are as the brightness information of that pixel, and YB and 0 are output, and when this pixel is designated as red, YR and YG are output as the brightness information of that pixel. is output as is, and also outputs YG=O, YB・0.

In this way, since 3-bit luminance information of YR, YG, and YB is used for each pixel, one screen can be divided into multiple areas and divided into red, blue, green, white, black, cyan, magenta, and yellow. When displaying the 8 colors separately for each area, unlike the conventional example, it is not possible to express the subtle shading of the image or the image reproducibility is deteriorated, and the above 8 colors are not displayed.
Colors can be used and displayed differently for each area, so 8
Simultaneous display of colors is also possible.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is a block diagram showing a circuit configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing a detailed circuit of the control section shown in FIG. 1.

In FIG. 1, a red luminance signal YR, a green luminance signal YG, and a blue luminance signal YB for one screen input from a camera circuit (not shown) are connected to an analog switch l every l vertical retrace period (1V). and is input to the A/D converter 2. Each of the above luminance signals is 256x2
This is a signal representing the brightness of each pixel on one screen divided into 56 pixels in scanning order. Each of these luminance signals is binarized for each pixel by the A/D converter 2,
The signal is input to the shift register 301 of the controller 3. This control unit 3 receives red, green, and blue color control signals R-CTL, G-CTL, and B-CTL for specifying colors from the outside.
, the memory control signal MEM-CTL, and the superimpose signal SIP-CTL are input via the buffer 4.

The binarized data input to the shift register 301 is converted by the shift register 301 into parallel data DO to D7 of every 8 bits, and then input to the memory 5 as a luminance information storage means.

This memory 5 uses RAM with a capacity of 256K,
64K is allocated to each of the above YR, YG, and YB, and the remaining 64K is used as a spare. Further, it is controlled by an external memory control signal M-on/off.

The timing at which the luminance data is loaded into the memory 5 is shown in FIG. 3(a). Shown in (b) and (c). Third
FIG. 3(a) shows the timing of one horizontal scanning period (IH), and FIG. 3(b) shows the timing of one vertical scanning period (1). Further, FIG. 3(c) shows switching timing for each lV.

The analog switch 1 shown in FIG. 3(C) is activated by the outputs A13 and A14 from the addressing circuit 302 shown in FIG.
It is switched at the timing shown in FIG.

The luminance signal taken in via the analog switch 1 is sequentially binarized into O or 1 by the A/D converter 2. This binarized signal is output from the oscillation circuit 6 as a horizontal synchronization signal HD based on the output clock signal.
In synchronization with the vertical synchronizing signal VD, eight pulses are manually input to the shift register 301. These 8 pulses of serial data are converted into parallel 8-bit data DO to D7 by this shift register 301, and are sent to the addressing circuit 302, H counter 303 and V counter 30.
The write enable (WE) signal of the timing generator 305 is sent to the memory addresses AO to A14 indicated by . The data is stored in the memory 4 in accordance with the output enable (OE) signal. Then, as shown in Figure 3(a), repeat the above operation while counting AO to A4 32 times within the IH period, and repeat this operation to count A5 to Al2 as shown in Figure 3(b). Repeat for IV minutes.

And for every iV, Al3. Count up Al4,
YR, YG. Capture 3 screens of YB.

When the brightness data stored in the memory 5 is retrieved at the same time as the brightness data YR, YG, YB,
That is, the case of displaying a white image will be explained as an example.

first,! The data for the first lH of the YR data for V is output to the memory address AO-Al2, A13A1.
Output to 4. Then, the parallel data DO to D7 output from the memory 5 are input to the shift register 301, and the
Convert to bit serial data.

Since this data needs to be output at the same timing as the next read YG and YB data, it is input to the 2H time base collector of the delay circuit 306.

Next, data for the first IH of the YR data is output from memory addresses AO to A12, A in the same way as above.
13 and A14, and then converted into 8-bit serial data by a shift register 30l. Since this data needs to be output at the same timing as the YB data to be read next, it is input to the IH time base collector of the delay circuit 306. Next, the first of the YB data
The data for the th IH is output from the memory address AO-A.
12, A13, and A14, the shift register 301 converts the data into 8-bit serial data, and outputs it to the delay circuit 306.

The YR. YG and YB are input to a color synthesizer 307 as a luminance information synthesizing means. This color synthesizer 307 is the above YR, YG
, VB and the color control signal R-CTL input from the outside.
．． G-CTL. Based on the B-CTL, color signals R, G, B representing the color specified by the color control signal and luminance signals YR, YG, YB of the color are output for each pixel.

By the above operation, the first I of the screen you are trying to obtain.
Get the data for H. And this operation! By repeating this for V minutes, data for l screen can be obtained. The color synthesizer outputs planking signals C-BLK and Y-BLK regarding color and brightness for image edge processing and the like.

For example, when specifying white, the above color control signal is
R-CTL, G-CTL, and B-CTL are all "V". First, the luminance signal of a pixel designated as white is, for example, Y
If R=O, YG=1, YB=1, the output signal for that pixel is R・1, G=l for the color signal.
, B=l, and the luminance signal is YR・O, YG・
t, YB=1.

Also, when specifying yellow, R-CTL=1.0-C
T.I. ,・1.8-CTL=0, and the luminance signal of the pixel designated as yellow is similar to the above, YR=O, YG=1,
When YB=1, the output signal for that pixel is R
:l. ,G・1,B=O1YR=OYG・1,YB・0
Then, the luminance signal of the pixel designated as yellow is YR=l,
If YG・l, YB・1, the output signal for that pixel is R=l, G=l, B=O, YR・1, YG=
l, YB=0. For pixels that display a yellow image, the output luminance signal is always YB・0, so Y
R, YG saws may be output. Display is performed on a color display device (not shown) based on the output signal from the color synthesizer. As an example of the display, for example, the designated color is white and the luminance signal is YR=O.
For a pixel with YG=1 and YB=1, only the green dot and blue dot within the area of that pixel are displayed, and the red dot is not displayed. Also, the designated color is yellow and the luminance signal is YR=I.
YG・1. For the YB.0 pixel, only the red and green dots within the pixel area are displayed, and the blue dots are not displayed.

In this way, since 3-bit luminance information of YR, YG, and YB is used for each pixel, the eight colors of red, blue, green, white, black, cyan, magenta, and yellow are used and displayed for each pixel. can do. Therefore, one screen is divided into multiple areas, and each area has the above 8f! ! ．． It can be displayed in different colors, and it is also possible to display eight colors simultaneously.

Effects of the Invention> As is clear from the above, in the color one-image superimposing device of the present invention, the luminance information storage means stores the red, green, and blue luminances binarized for each pixel on one screen. The signals are stored for each color in scanning order, the luminance information output means outputs the luminance information stored in the luminance information storage means for each color in scanning order, and the luminance information synthesis means outputs from the luminance information output means. Based on the red, green, and blue brightness information for each pixel and the color control signal input from Uiro that specifies the color for each pixel, the brightness information for the color specified for each pixel is output. , one screen is divided into multiple areas, red, blue, green, white,
When displaying the eight colors of black, cyan, magenta, and yellow for each area, it is not possible to express the subtle shades of light and shade in the image, and the reproducibility of the image deteriorates, as in the conventional example. Therefore, the above eight colors can be used and displayed separately for each area, and therefore eight colors can be displayed simultaneously.

[Brief explanation of drawings]

FIG. I is a block diagram showing the circuit configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the circuit configuration of the control section in the above embodiment, FIG. 3 is a timing chart in the above embodiment, and FIG. 4 5 is a block diagram showing the circuit +R of the conventional example, and FIG. 5 is a block diagram showing the circuit configuration of the control section in the conventional example. l... Analog switch, 2... A/D converter, 3... Control unit, 301... Shift register, 306
...Delay circuit, 307...Color synthesizer.

Claims (1)

[Claims] (1) Brightness information storage means for storing red, green, and blue brightness information binarized for each pixel for one screen in scanning order for each color; and a brightness information storage means for storing the brightness information stored in the brightness information storage means for each color. brightness information output means for reading and outputting each color in scanning order; red, green, and blue brightness information for each pixel output from the brightness information output means; and a color specifying the color for each pixel input from the outside. 1. A color image superimposing device comprising: a brightness information synthesizing means for outputting brightness information about a color designated for each pixel based on a control signal.