JPH04273584A - Standalone image-processing device - Google Patents

Abstract

PURPOSE:To reduce the transferring amount of data by integrating the image memories necessary for the image processing and for image output, respectively into one memory. CONSTITUTION:A standalone image-processing device 1 performs the image processing such as magnification, reduction, rotation, compression and extension, etc., and the image input/output processing by a local MPU's interpretation of the command from a host CPU 17. The data is inputted in image memories 5, 6 via an image input interface 8. The image data transmitted from the host CPU 17 or compressed/expanded code data are stored in the image memories 5, 6. For instance, the data stored in the image memory 5 is processed in an image processing part 7 connected by the image memories 5, 6 and buses 15, 16 by the command from the host CPU 17 and is written in the other image memory 6. And the processed data is outputted as it is to the image output device or is transmitted to the host CPU 17.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an independent image processing apparatus that is connected to a small computer and performs image processing and image input/output processing.

0003

2. Description of the Related Art Conventionally, an image processing system using a small computer has a configuration as shown in FIG. 21 is a CPU having internal program memory, display memory, etc., 22 is an expansion bus, and 23 is an image memory 31, an image memory 32, and an image processing section 33.
An image processing board 24 performs image processing such as enlarging, reducing, rotating, compressing, and decompressing images; 24 is composed of a controller 34, an image memory 35, and an I/O interface 36, and serves as a link between an image input device and an image output device; An image input/output board inputs and outputs image data; 25 is an auxiliary storage device that stores image data; and 26 is a monitor that displays image data.

Here, image data from the image input device is read into the memory within the CPU 21 via the image input/output board 24 connected to the expansion bus 22 of the CPU 21, and is sent to the image processing board 23 for processing. The processed data is read from the image processing board 23 and further sent to the image output device via the image input/output board 24 for processing.

[0005]

As described above, in the conventional image processing system, first, image data is read from an image input device via the image input/output board 24 connected to the expansion bus 22 of the CPU 21, and the data is converted into an image. A large amount of data is input/output via the expansion bus 22, such as sending data to the processing board 23, reading out processed data from the image processing board 23, and sending it to the image output device via the image input/output board 24. It takes a long time to process as it is done many times.
It reduces the throughput of the entire system and
There was a problem in that the load on No. 1 itself also increased.

The present invention has been made to eliminate these conventional drawbacks, and it greatly reduces the data input/output time in image processing, prevents a decrease in the throughput of the entire system, and reduces the load on the CPU. An object of the present invention is to provide an image processing device that can be made lightweight.

[Configuration of the invention]

[0008]

[Means for Solving the Problems] An independent image processing device of the present invention that achieves the above-mentioned conventional objects includes a local MPU that interprets commands from a host CPU and controls the entire device, and a local MPU that stores image data. An image processing unit that performs image processing between the image memory and the image memory, a bus interface with an external bus of the host CPU, and an input/output interface with an image input/output device, and , the image processing unit performs image processing such as enlargement, reduction, rotation, compression, and expansion, and input/output processing of image data to the image input/output device.

[0009]

[Operation] The present invention performs image processing such as enlargement, reduction, rotation, compression, and expansion according to commands from the host CPU, and image input/output processing such as image data input from an image input device and image data output to an image output device. I do.

The image memory stores not only image data from the image input/output device but also image data sent from the host CPU or compressed/expanded code data. The image data stored in the image memory is processed by an image processing section connected to the image memory in response to a command from the host CPU, and written into the image memory. Processed data can be output as is to an image output device via an input/output interface, or can be output to a host computer via a bus interface.
It can also be sent to PU.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an image processing apparatus according to an embodiment of the present invention. In the figure, 1 is host C
An independent image processing device 2 is connected to the external bus 18 of the PU 17 and performs image processing and image data input/output processing, and interprets commands from the host CPU 17.
Local MPU that controls the entire device, 3 is local M
4 is a bus interface that connects the host CPU 17 and internal bus 10; 5 and 6 are image memories that each store image data; 7 is image processing between the image memories 5 and 6. 8 is an image input interface for connecting with an image input device, 9 is an image output interface for connecting with an image output device, 11 is an image I/O bus, 15 and 16 are image memories 5, This is a bus that connects the image processing section 6 and the image processing section 7 and is used during image processing.

Next, the operation of the independent image processing apparatus 1 according to this embodiment configured as described above will be explained.

The independent image processing device 1 has a host C
In response to commands from the PU 17, image processing such as enlargement, reduction, rotation, compression, and expansion, and image input/output processing such as image data input from an image input device and image data output to an image output device are performed.

The image memories 5 and 6 store not only image data input via the image input interface 8 but also image data sent from the host CPU 17 or compressed/expanded code data. For example, the data stored in the image memory 5 is stored in the host C
Image memories 5 and 6 are activated by commands from PU17.
The image data is processed by the image processing unit 7 connected to the image processor 7 by buses 15 and 16, and written to the other image memory 6. The processed data can be output as is to the image output device via the image output interface 9, or can be sent to the host CPU 17 via the bus interface 4.

All operations are executed by the local MPU 2 interpreting commands from the host CPU 17. Also, the status after execution can be determined by the host CPU using commands.
17 can be known.

Furthermore, since the device itself is equipped with a local MPU 2, it is also possible to connect a plurality of devices to the external bus 18 and operate them simultaneously.

[0018]

Effects of the Invention As explained above, according to the independent image processing device of the present invention, data can be processed by combining the image memories that were previously required separately for image processing and image input/output into one. The amount of data to be transferred can be significantly reduced, and processing time can be shortened. Further, by providing a local MPU, the host CPU executes processing simply by issuing a command, and the load on the host CPU can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an independent image processing device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a conventional image processing system.

[Explanation of symbols]

1……Image processing device 2...Local MPU 3……Program memory 4...Bus interface 5, 6...Image memory 7... Image processing section 8... Image input interface 9……Image output interface 10……Internal bus 11……Image I/O bus 15, 16...bus 17……Host CPU 18……External bus

Claims (1)

[Claims] 1. A local MPU that interprets commands from a host CPU and controls the entire device; an image memory that stores image data; an image processing unit that performs image processing between the image memory; It has a bus interface with an external bus of the host CPU and an input/output interface with an image input/output device, and under the control of the local MPU, the image processing unit performs image processing such as enlargement, reduction, rotation, compression, and decompression; An independent image processing device characterized by performing input/output processing of image data to an image input/output device.