JPS63116569A - Image processing system - Google Patents

Abstract

PURPOSE:To easily recognize the situation of an error by detecting memory overflow when received information is expanded and writing data which shows the memory overflow. CONSTITUTION:A bit of information from an information processor 11 is inputted to a compressing/expanding part 9 by a DMA control device 3 and expanded by the compressing/expanding part 9. The expanded data is stored in an image memory 4. If the received image information cannot be entirely stored in the image memory 4 and is overflowed, a bit of information in the image memory 4 is discarded. Fonts which show the occurrence of the memory overflow and are stored in a memory 2 are developed in the preset order of a character string in the image memory 4 and the contents of the image memory 4 are outputted and the whole processing is finished. Therefore a receiving side can easily recognize the memory overflow and obtain information about the error which occurs when the received information is expanded.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to an image processing system, and particularly to a facsimile device that is equipped with an image information input/output device and a transmission control section and is capable of transmitting image information to and from other devices. Related to image processing systems.

[Prior art] In recent years, in the field of office automation, image information such as pictures, figures, photographs, etc. can be handled as if they were documents, and image information can be exchanged with other devices via communication networks, etc. Demand for image processing systems has become stronger, and devices of this type are appearing on the market.

In this type of device, a document is set on an input device such as an image scanner for inputting image information, and the input device reads image information from the document, compresses the read image information, and
Send it to another device along with the original size information.

The device that receives the information sends the camera 1 to an output device such as a laser beam printer that outputs image information according to the document size information.
A paper of a specified size was selected from among the recording papers listed, the received image information was decompressed, and the image information was printed out.

In such a device νt, if human information or photos are processed manually, even if compression is performed, the amount of information may not be much compressed and the amount of information may be close to the original image.

If the storage capacity of the device that received this information is small, the decompression results in a memory overflow, which has the disadvantage that it is difficult to tell whether the image is discarded or whether it is due to the situation on the receiving side.

[Objective] The present invention aims to eliminate the shortcomings of the prior art described above, and detects memory overflow when decompressing received information and writes data indicating memory overflow to detect error situations. This makes it easily recognizable.

[Embodiments] Preferred embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a block diagram of an image processing system to which the present invention is applied. Memory for storing fonts, 3 is DMA for DMA transfer
a control device, 4 an image memory that stores images to be input and output;
Reference numeral 5 indicates an input/output control unit for controlling input/output devices, 6 indicates an image information output device, 7 indicates an image input device, and 8 indicates an input/output control unit or the input/output devices 6 and 7 are used individually to perform copy processing of the original. 9 is a keychain used when performing image information MR, MM
A compression/expansion unit that performs two-dimensional compression and expansion of R, etc., 10
11 is the information processing device, 12 is the information processing device as the transmission source, 13 is the main lot (M lot), and 14 is the peripheral lot (P bus).

The operation of this embodiment will be explained in detail below with reference to the operation flowchart regarding the MPU 1 shown in FIG.

First, when the information processing device 11 receives compressed information from the transmission source information processing device 12, it issues a reception notification to the MPUI via the line interface unit 10 in Sl.

The MPUI thereby sets the DMA control device 3 so that DMA transfer can be performed between the line interface section 10 and the compression/expansion section 9 and between the compression/expansion section 9 and the image memory 4.

Next, in S2, the information processing device 11 outputs the received data to the line interface section 10. This information is input to the compression/expansion section 9 by the DMA control device 3, is expanded by the compression/expansion section 9, and the expanded data is stored in the image memory 4.

In S3, when the decompression is completed, the image memory 4 is checked to determine whether the decompressed image information is cut off, that is, whether there is an overflow.

If there is no overflow, the information in the image memory 4 is outputted to the image information output device 6 using the input/output control device 5 in S6, and the process ends.

If all the received image information is not stored in the image memory 4 and overflows, the information in the image memory 4 is first discarded in S4. Next, at 85, the character strings in the font indicating the occurrence of memory overflow stored in the memory 2 are developed on the image memory 4 in a predetermined order. Then, in S6, the contents of the image memory 4 are outputted as in the normal case, and the process ends.

As a result, if a situation arises in which all received images cannot be stored in the image memory 4, the operator on the receiving side can easily recognize this situation. Therefore, when such a situation occurs, it is possible to quickly take measures such as requesting retransmission to the operator on the receiving side or the transmitting side.

In the above embodiment, if the decompressed data causes a memory overflow, the entire received data is discarded and characters are output, or the decompressed data is left in the second half of the page and the lower half is output. If there is a gap in outputting characters, it is obvious that a memory overflow occurred when outputting the information.

Furthermore, instead of a fixed string of characters, it is also possible to output information and data amount regarding the received image.

Furthermore, in this embodiment, the overflow of the image memory on the receiving side has been explained, and it is also possible to perform similar processing on the sending side when the image data to be sent is not stored in the image memory on the sending side. It is.

Alternatively, the other party may be notified that an overflow has occurred.

[Effects] As explained below, by detecting an overflow in the storage means during decompression and outputting a message to that effect, it becomes easier for the receiving side to understand whether there is a memory overflow condition, and information regarding errors during decompression is also provided. There is an effect that makes it possible to obtain.

Additionally, in cases where the paper size, or image information, is limited on the receiving terminal, it is possible to process errors for large format image information even if the memory capacity is limited to the specified size. be.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment according to the present invention, and the ilZ diagram shows the operation flowchart of the embodiment from 1 to 1. 4... Image memory, 5... Input/output control device,
6... Image information output device, 7... Image information output device, 8... Keyboard 1 to part, 9... Compression/expansion part, 1
0...Line interface unit, 11...Information processing device, 12...Transmission source information processing device, 13...M bus, 14...P bus.

Claims (1)

[Claims] An input means for inputting compressed image information, a decompression means for decompressing the compressed image information input from the input means, and a storage means for storing the image information decompressed by the decompression means. In the image processing system, when the compressed image information input from the input means is decompressed by the decompression means, and the image information exceeds the storage capacity of the storage means, the data indicating that the image information has overflowed is stored in the data as described above. An image processing system characterized by writing to a storage means.