JP2626294B2 - Color image processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image processing apparatus which is used in a file system or the like, processes and processes a color image (still image), and is capable of switching a plurality of screens or simultaneously displaying the same. The present invention relates to a color image processing apparatus for speeding up processing and processing of a color image.

[0002]

2. Description of the Related Art In particular, in color image processing, since the amount of information of a natural image is large and it takes time to process the image data, a high-speed image processing processor or a plurality of processors is used to speed up the processing. Like that. In this case, as a high-speed image processor,
For example, a non-Neumann data flow processor is known.

On the other hand, FIG. 2 shows an example in which image processing is performed using a plurality of processor elements PE.
Various high-speed schemes can be adopted depending on the functions and arrangements of E. As an example of such a high-speed method, a parallel type image processor that performs data processing in a certain unit while transmitting and receiving data to and from another processor at a necessary stage, and performs the overall processing in parallel is realized. ing.

[0004]

However, even if a high-speed image processor such as a non-Neumann-type data flow processor is used, an image is processed in parallel using the parallel image processor. However, there is a problem that the architecture has a complicated structure and its programming must be difficult.

In addition, in the case of a color image, since it is necessary to perform image processing for each component (for example, R, G, B), the above processing program must be created independently for each component. Further, in order to display an image of the processing result, it is necessary to synchronize the processing of each component, but there is a problem that it is difficult to synchronize the components with each other.

Accordingly, an object of the present invention is to make it easy to create a program for image processing, to speed up image processing for a color image, and to easily synchronize when processing each component of a color image. It is another object of the present invention to provide a color image processing apparatus which can take the following.

[0007]

In order to achieve the above object, the present invention relates to a color image processing apparatus which performs predetermined processing of color image data, writes the processed image data in an image memory, and uses the color image data as display data such as a monitor device. First, second, and third processors having the same image processing architecture for processing image data for each of R, G, and B components, and image data of each component that has been subjected to image processing by each of the processors. Includes first, second, and third image memories written so as to be displayable for each color plane corresponding thereto, a program area and a work area, and is commonly allocated to each of the processors in the memory of the apparatus. And the respective processors are connected to either the system common area or the respective image memories via a bus. First, second, and third switching means for selectively connecting the first and second processors and an access signal from a specific one of the processors to the system common area. An access identification unit for controlling a switching operation of each switching unit, wherein the first, second, and third processors having the same image processing architecture are used for the image processing of the R, G, and B components. And assigning a reset signal from the specific one processor to the other processor at the same time as the image processing, so that the specific one processor has a function as a master processor leading the other processor. , Second and third
Processor with the same image processing architecture,
It is characterized in that image processing for each component is performed simultaneously with the same clock and the same image processing program.

[0008]

According to the above arrangement, the color image data is represented by R,
When performing image processing for each of the components G and B, a reset signal is generated from, for example, a first processor as a master processor to other second and third processors, and control for image processing is performed. Signals and addresses are output to the second and third processors, and the system common area is accessed. Based on the access signal, the switching means switches to the system common area by the access identifying means, and each processor performs image processing simultaneously according to the data of the image processing program stored in the system common area. .

In this case, since each processor executes the same program at the same clock under the same image processing architecture and the processing procedure is not different, synchronization is established between the processors. In addition, the synchronous relationship is maintained.

When writing data of each component processed by each processor to the first, second, and third image memories, the access identifying means may use the first to third data.
Are switched to the image memory side, and the R, G, and B data subjected to the image processing are written in the first to third image memories.

In writing the data, the processing of each of the R, G, and B planes is synchronized in the same manner as described above, so that the contents of the first to third image memories are synchronously rewritten. As a result, the data written in the first to third image memories is converted by the D / A converter into R, G,
The converted image is displayed on a monitor device or the like by converting the analog signal into a B analog signal.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to FIG. As shown in the figure, this color image processing apparatus has at least the same image processing architecture, and performs first to third image processing of image data for each of R, G, and B components. Processors 1, 2, and 3 are provided.

The color image processing apparatus has a system common area 4 including a common program area and a work area for each of the processors 1 to 3 in its memory. First storing image-processed data for each color component in a displayable manner.
And D / A converters 8, 9, and 10 for converting the image data (planes) 5, 6, and 7 into analog signals that can be displayed on a monitor or the like.

First to third processors 1, 2, 3
And the system common area 4 and the first to third image memories 5, 6, and 7, the first to third processors selectively connecting each of the processors 1, 2, 3 to any of them via a bus. Third switching circuits 11, 12, 13 are provided,
The switching is performed by the access identification circuit 14.

The access identification circuit 14 monitors an access signal from any one of the processors 1 to 3, in this embodiment, from the first processor 1 to the system common area 4, and when there is an access signal, First, the first to third switching circuits 11, 12, and 13 are switched to the system common area 4 side. On the other hand, when writing processed data in the first to third image memories 5, 6, and 7 without an access signal, the first to third switching circuits 11,
12 and 13 are first to third image memories 5,
Switch to 6,7 side.

The system common area 4 stores data having no dependency on processing data such as an image processing program commonly assigned to the first to third processors 1, 2, and 3. Thus, when image processing is simultaneously performed for each color component by the first to third processors 1, 2, 3 respectively, the respective processors 1, 2, 3
A few synchronizations are maintained.

In the above arrangement, the input color image data is separated for each of R, G, and B color components.
Image processing is performed by the first to third processors 1, 2, and 3. In this embodiment, the first processor 1 is used as a master processor with respect to the other second and third processors 2, 3. The first processor 1 accesses the system common area 4 including a control signal and an address signal necessary for image processing, and a reset signal to the second and third processors 2 and 3. Is output.

As described above, the access signal to the system common area 4 is output from the first processor 1 so that the access identification circuit 14 allows the switching circuits 11 to 13
Is switched to the system common area 4 side, and the image processing program data in the program area of the system common area 4 is switched via the switching circuits 11 to 13 to the first to third processors 1 and 2 based on the control signal and the address signal.
These are taken into 2 and 3, respectively.

Thus, the processors 1, 2, and 3 operate under the same image processing architecture in accordance with the above-described image processing program.
(G plane, B plane). Therefore, even when there is a large amount of color image data, the color components (R, G,
Since image processing can be performed simultaneously and at high speed for each B), and image processing for each of the R, G, and B planes can be performed by the same program, there is no need to create a program for each color component.

Further, as described above, the first processor 1
Is positioned as a master processor, and the first processor 1 resets the other second and third processors 2 and 3 so that each of the processors 1 to 3 can operate under the same image processing architecture. Since the same program is executed at the same clock, that is, the image data processing is performed in the same procedure, synchronization between the processors 1, 2, 3 is maintained, and the synchronization relationship is maintained.

When each color component is image-processed by the first to third processors 1, 2, 3 as described above, the image-processed data is then stored in the first to third image memory 5 , 6, 7 are executed. That is, when the access to the system common area 4 is completed,
Each of the switching circuits 11 to 13 is switched to the first to third image memories 5, 6, and 7 by the access identification circuit 14, and the data processed for each color component is simultaneously processed in the first to third images. Are written to the image memories 5, 6, 7.

Also in this case, the address control, that is, access to the first to third image memories 5, 6, 7 is performed by the first processor 1 as a master processor.
It is done in. Thus, the image-processed data is synchronously written in the first to third image memories 5, 6, and 7, and the data in each of the memories changes simultaneously.

After the data is written, the first to third image memories 5, 6, and 7 output, for example, a screen refresh signal and store the stored data in the respective D memories.
Are output to the A / A converters 8, 9, and 10, and the images based on the R, G, and B analog signals are displayed on the monitor device. Since the analog signals are synchronized, for example, switching of the images is performed. In this case, the images can be switched smoothly.

[0024]

As described above, according to the color image processing apparatus of the present invention, the image processing of each component of the color image is allocated to the first to third processors having the same image processing architecture. A specific one of the processors is positioned as a master processor, and the other processors are reset by the same master processor. In each processor including the master processor, the same clock and the same image processing program are used. , Without having to build an image processing program for each processor,
Image processing of a color image can be performed at higher speed.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a color image processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a conventional example of a parallel processing method using a plurality of processors.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st processor (master processor) 2 2nd processor 3 3rd processor 4 System common area 5 1st image memory 6 2nd image memory 7 3rd image memory 11 1st switching circuit 12 2nd Switching circuit 13 third switching circuit 14 access identification circuit

Claims (1)

(57) [Claims] Writes 1. A color image data to a predetermined processing to the image memory, a color image processing apparatus according to the display data of the monitor device or the like, the color image data R, G, for each component of B
The first is the same image processing architecture for processing.
Second and third processors, and each of these processors
The image data of each component subjected to image processing
Of each color plane
First, second and third image memories, a program area and
And the work area, and
System shared for each processor
Communication area and the processor common area
Or select one of the above image memories via a bus
First, second, and third switching means that are electrically connected to each other;
The above system is executed from a specific one of the processors.
Monitors access signals to the system common area and
The switching operation of each switching means is controlled by the presence or absence of
A first and a second image processing architecture having the same image processing architecture.
And a third processor, each of the above R, G, B components
To the image processing of
The master processor that leads the other processors to the processor
Function as an imager and specify the above when processing images.
From one processor to the other processor at the same time.
A set signal is supplied, and the first, second and third processes are performed.
The same image processing architecture and the same
And each component with the same image processing program
A color image processing apparatus wherein the image processing is performed simultaneously.