JPH08314682A - Method and device for display control - Google Patents

Abstract

PURPOSE: To provide the display control method which can display an image provided by a host computer and an image provided by an image processor controlled by the host computer on one display device at the same time and is fast in the display speed of the image provided by the image processor. CONSTITUTION: A color which is not included in the color range used to display contents provided by the host computer 1 is set as a specific color, which is assigned to the color video signal corresponding to a specific area set in the screen area of the display device 5 as to the color video signal outputted from the host computer 1; when the color represented with the color video signal outputted from the host computer 1 is a color other than the specific color, the color video signal outputted from the host computer 1 is supplied to the display device 5 and when the color represented with the color video signal outputted from the host computer 1 is the specific color, the video signal outputted from the image processor 2 is supplied to the display device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control method for simultaneously displaying an image provided by a host computer and an image provided by an image processing device controlled by the host computer on a single display device. The present invention relates to a display control device.

[0002]

2. Description of the Related Art A system for displaying an image provided by a host computer and an image provided by an image processing apparatus controlled by the host computer on a display device includes the following system.

FIG. 4 shows a first system. Host computer 101 and host computer 101
The image processing apparatus 102 controlled by the above is connected by a control line 103 for transmitting a command. The image provided by the host computer 101 is displayed by the first CRT 104. The image provided by the image processing apparatus 102 is the second CRT 1
It is displayed by 05.

FIG. 5 shows a second system. Host computer 101 and host computer 101
The image processing apparatus 102 controlled by the above is connected by a control line 103 for transmitting a command. Further, in the host computer 101 and the image processing apparatus 102, one CRT 106 has a changeover switch 1
It is connected via 07. Host computer 10
The image selected by the changeover switch 107, out of the image provided by No. 1 and the image provided by the image processing apparatus 102, is displayed on the CRT 106.

FIG. 6 shows a third system. Host computer 101 and host computer 101
The image processing apparatus 102 controlled by
They are connected by a bus 108 such as I or LAN. A CRT 109 is connected to the host computer 101.

The image provided by the image processing apparatus 102 is transferred to the host computer 101 via the bus 108, and then the CRT 1 is sent from the host computer 101.
By being sent to 09, it is displayed on the CRT 109. The image provided by the host computer 101 is displayed on the CRT 109 by being sent from the host computer 101 to the CRT 109. In such a system, an image provided by the host computer 101 and an image provided by the image processing apparatus 102 can be simultaneously displayed on the CRT 109 on one CRT 109 by a multi-window.

[0007]

The first system shown in FIG. 4 requires two CRTs. In the system shown in FIG. 5, only one CRT is required, but the changeover switch 107
There is a problem in the user interface because the user has to switch by.

In the third system shown in FIG. 6, only one CRT is required, but in order to display the image provided by the image processing apparatus 102 on the CRT 109, the image processing apparatus 102 sends the image to the host computer 101. It has to be transferred, and the existence of this transfer time causes the display speed to slow down.

According to the present invention, the image provided by the host computer and the image provided by the image processing device controlled by the host computer can be simultaneously displayed on one display device, and further, the image processing device can be displayed. An object of the present invention is to provide a display control method and a display control device in which the display speed of an image provided by the device is high.

[0010]

According to a first display control method of the present invention, an image provided by an image processing apparatus and an image provided by a host computer controlling the image processing apparatus are displayed on a single unit. In a display control method of simultaneously displaying on a device, a color other than a color range used for displaying contents to be provided by a host computer is set as a specific color, and a display device among color video signals output from the host computer is displayed. When a specific color is assigned to a color video signal corresponding to a predetermined area set in the screen area of the computer and the color represented by the color video signal output from the host computer is a color other than the specific color, the host computer The color video signal output from the When the color represented by the video signal is the specific color, and supplying the video signal outputted from the image processing apparatus on the display device.

A first display control device according to the present invention is a display device for simultaneously displaying an image provided by an image processing device and an image provided by a host computer controlling the image processing device on one display device. In the control device, means for setting a color other than the color range used for displaying the content to be provided by the host computer as a specific color, and within the screen area of the display device of the color video signal output from the host computer. A means for assigning a specific color to the color video signal corresponding to the set predetermined area, and a color output from the host computer when the color represented by the color video signal output from the host computer is a color other than the specific color Color that supplies the video signal to the display device and is output from the host computer When the color represented by the image signal is a specific color, characterized in that it comprises means for supplying to the display device the image signal output from the image processing apparatus.

A second display control method according to the present invention is a display for simultaneously displaying an image provided by an image processing device and an image provided by a host computer controlling the image processing device on one display device. In the control method, a gradation other than the gradation range used for displaying the content to be provided by the host computer is set as the specific gradation, and the black and white image signal output from the host computer has a screen area of the display device. If a specific gray scale is assigned to a black and white video signal corresponding to a predetermined area set in the host computer and the gray scale represented by the black and white video signal output from the host computer is a gray scale other than the specific gray scale, The black-and-white video signal output from the computer is supplied to the display device, and converted into the black-and-white video signal output from the host computer. Gradation represented me within when a certain gradation, and supplying the video signal outputted from the image processing apparatus on the display device.

A second display control device according to the present invention is a display device for simultaneously displaying an image provided by an image processing device and an image provided by a host computer controlling the image processing device on one display device. In the control device, means for setting a gray scale other than the gray scale range used for displaying the contents to be provided by the host computer as a specific gray scale, and a screen of the display device among the black and white video signals output from the host computer A means for assigning a specific gradation to a signal corresponding to a predetermined area set in the area, and a host computer when the gradation represented by the monochrome video signal output from the host computer is a gradation other than the specific gradation. The black and white video signal output from the host computer is supplied to the display device, and the black and white video output from the host computer is output. When the tone is a specific tone that is represented by item, characterized by comprising means for supplying to the display device the image signal output from the image processing apparatus.

[0014]

The first display control method or the first display control method according to the present invention
In the display control device, the color other than the color range used for displaying the content to be provided by the host computer is set as the specific color. Among the color video signals output from the host computer, a specific color is assigned to the color video signal corresponding to a predetermined area set in the screen area of the display device. When the color represented by the color video signal output from the host computer is a color other than the specific color, the color video signal output from the host computer is supplied to the display device, and the color video output from the host computer is supplied. When the color represented by the signal is the specific color, the video signal output from the image processing device is supplied to the display device.

In the second display control method or the second display control device according to the present invention, a gray scale other than the gray scale range used for displaying the contents to be provided by the host computer is set as the specific gray scale. It Of the black-and-white video signal output from the host computer, a specific gradation is assigned to the black-and-white video signal corresponding to a predetermined area set in the screen area of the display device. When the grayscale represented by the monochrome video signal output from the host computer is a grayscale other than the specific grayscale, the monochrome video signal output from the host computer is supplied to the display device.
When the grayscale represented by the monochrome video signal output from the host computer is a specific grayscale, the video signal output from the image processing device is supplied to the display device.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of the image processing system. The host computer 1 and the image processing apparatus 2 controlled by the host computer 1 are connected by a control line 3 for transmitting a command. The video signal output from the host computer 1 and the video signal output from the image processing device 2 are sent to one CRT 5 via the screen synthesizing device 4.

The video signal output from the host computer 1 is a color video signal. The video signal output from the image processing device 2 is a color video signal or a monochrome video signal. The display contents provided by the host computer 1 are mainly characters such as commands, and in this example, they are represented in black and white. The display content presented by the image processing device 2 is mainly a graphic.

In the screen area of the CRT 5, the image processing device 2
An area (hereinafter referred to as a window area) for displaying an image provided by the host computer 1 is set. Of the video signals output from the host computer 1, the video signal corresponding to the window area is assigned a specific color other than black and white, for example, green.

FIG. 2 shows the configuration of the screen compositing device 4. The video signal output from the host computer 1 is passed through the sync separation unit 11 and the A / D conversion unit 12,
The data selector 1 is sent to the specific color detector 13
Sent to 4.

On the other hand, the video signal output from the image processing apparatus 2 is sent to the field memory 17 via the sync separation section 15 and the A / D conversion section 16 and accumulated in the field memory 17, and then the data selector. Sent to 14.

The specific color detector 13 includes a data selector 14
A control signal (select signal) S to the output is output. When the control signal S is at L level, the data selector 14
Host computer 1 sent from the / D converter 12
Select and output the signal from. When the control signal S is at H level, the data selector 14 selects and outputs the signal from the image processing device 2 sent from the field memory 17.

The L-level control signal S is always output from the specific color detector 13. When the color represented by the video signal from the host computer 1 input to the specific color detection unit 13 is the specific color indicating the window area (green in this example), the control signal S is output by the specific color detection unit 13. It is inverted to H level. When the color represented by the signal input to the specific color detection unit 13 is not the specific color after the control signal S is inverted to the H level, the specific color detection unit 13 changes the control signal S to the L level. Returned to the level.

Therefore, when a signal other than the specific color is input to the specific color detector 13, the A / D converter 1
2 outputs (video signal from the host computer 1) are output from the data selector 14. Data selector 1
The signal output from the C.I.
Sent to RT5.

When a signal of a specific color corresponding to the window area in the screen area of the CRT 5 is input to the specific color detection unit 13, the output of the field memory 17 (the video signal from the image processing device 2) is output. ) Is output from the data selector 14. The signal output from the data selector 14 is sent to the CRT 5 via the D / A converter 18.

As a result of this, as shown in FIG.
An image presented by the image processing device 2 is displayed in the window region W in the screen region of T5. An image presented by the host computer 1 is displayed in the area other than the window area W in the screen area of the CRT 5.

The specific color may be any color other than the color used to display the contents to be provided by the host computer 1, and a plurality of colors may be set as the specific color.

The present invention also provides a host computer 1.
The present invention can be applied even when the video signal output from is a video signal represented by black and white gradation. In this case, the contents to be presented by the host computer 1 are expressed by using gradations other than the middle predetermined gradation range of the entire gradation range, and the predetermined gradation range is set to the specific gradation range. . Of the video signals output from the host computer 1, the video signal corresponding to the window area is assigned a gradation within a specific gradation range. Then, the output of the image processing apparatus 2 may be sent to the CRT 5 only when the gradation of the video signal output from the host computer 1 is within the specific gradation range.

[0029]

According to the present invention, the image provided by the host computer and the image provided by the image processing device controlled by the host computer can be simultaneously displayed on one display device.
Moreover, the display speed of the image provided by the image processing device is higher than that of the conventional technique.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an image processing system.

FIG. 2 is a block diagram showing a configuration of a screen compositing device.

FIG. 3 is a schematic diagram showing a display screen of a CRT.

FIG. 4 is a block diagram showing a conventional example.

FIG. 5 is a block diagram showing another conventional example.

FIG. 6 is a block diagram showing still another conventional example.

[Explanation of symbols]

 1 Host Computer 2 Image Processing Device 4 Screen Synthesis Device 5 CRT 11, 15 Sync Separation Unit 12, 16 A / D Converter 13 Specific Color Detector 14 Data Selector 17 Field Memory 19 D / A Converter

Claims (4)

[Claims] 1. A display control method for simultaneously displaying an image provided by an image processing device and an image provided by a host computer controlling the image processing device on one display device, wherein the image is provided by the host computer. The color image corresponding to a predetermined area set in the screen area of the display device in the color video signal output from the host computer by setting a color other than the color range used to display the desired content as the specific color. A specific color is assigned to the signal, and when the color represented by the color video signal output from the host computer is a color other than the specific color, the color video signal output from the host computer is supplied to the display device, When the color represented by the color video signal output from the computer is a specific color , Display control method and supplying the video signal outputted from the image processing apparatus on the display device. 2. A display control device for simultaneously displaying an image provided by an image processing device and an image provided by a host computer controlling the image processing device on a single display device. Means for setting a color other than the color range used to display the desired content as a specific color, and a color corresponding to a predetermined area set in the screen area of the display device in the color video signal output from the host computer. A means for assigning a specific color to the video signal, and when the color represented by the color video signal output from the host computer is a color other than the specific color, the color video signal output from the host computer is supplied to the display device, The color represented by the color video signal output from the host computer is a specific color In some case, the display control apparatus characterized by comprising means for supplying to the display device the image signal output from the image processing apparatus. 3. A display control method in which an image provided by an image processing device and an image provided by a host computer controlling the image processing device are simultaneously displayed on one display device. The gradation outside the gradation range used to display the desired content is set as the specific gradation, and it corresponds to the predetermined area set in the screen area of the display device among the black and white video signals output from the host computer. If a specific gradation is assigned to the black and white video signal and the gradation represented by the black and white video signal output from the host computer is a gradation other than the specific gradation,
The black and white video signal output from the host computer is supplied to the display device, and when the gray scale represented by the black and white video signal output from the host computer is a specific gray scale, the video signal output from the image processing device is displayed. A display control method comprising supplying to a device. 4. A display control device for simultaneously displaying an image provided by an image processing device and an image provided by a host computer controlling the image processing device on a single display device. Means for setting a gray scale other than the gray scale range used to display the desired content as a specific gray scale, in a predetermined area set in the screen area of the display device among the black and white video signals output from the host computer A means for assigning a specific gray scale to the corresponding signal, and when the gray scale represented by the black and white video signal output from the host computer is a gray scale other than the specific gray scale, the black and white video signal output from the host computer is displayed. The gradation represented by the black and white video signal supplied to the device and output from the host computer is a specific gradation In some case, the display control apparatus characterized by comprising means for supplying to the display device the image signal output from the image processing apparatus.