KR950006752B1 - Picture data processing method for fax - Google Patents

Abstract

The method minimizes transformation of image data due to resolution transformation after image processing and reduces internal processing time. It comprises : (i) a step(21) of searching if the facsimile number of the other side memorized in parameter memory exists or not; (ii) a step(22) of fetching and analyzing necessary information for image processing of type of the other side; (iii) a step(23) of scanning and reading a copy; (iv) a step(24) of processing image according to resolution and paper size; (v) a step(25) of storing a processed image code and data in memory; (vi) a step(26) of executing transmission information exchange with the other facsimile; (vii) a step of transmitting a stored image data.

Description

Facsimile image data processing method

1 is a flowchart showing a process of facsimile image data processing and transmission according to the prior art.

2 is a block diagram of a facsimile image processing system added with a parameter memory according to the present invention.

3 is a flowchart showing a facsimile image data processing method according to the present invention;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing image data of a facsimile, and more particularly, to a method of processing image data for minimizing a case where resolution conversion occurs after image processing to prevent deformation of image data.

The image data transmitted from the facsimile is composed of black and white binary data. This data must be transmitted after resolution conversion and original size conversion according to the other fax machine to be transmitted.

In particular, the conventional G4 type facsimile apparatus primarily stores information encoded by converting image data into a memory device suitable for a user mode such as binarization and dithering selected by a user, and then stores information in a memory device and then communicates with the other model to communicate with. Negotiation is performed to compare the parameters (resolution, paper size, etc.) of the image data currently stored for transmission with the other model to determine whether transmission is possible.

Referring to the flowchart of FIG. 1, the process until the transmission of the conventional image data of the prior art is as follows.

When the original is to be sent in the standby state, an original document sending menu (e.g., communication reservation, original color, resolution, etc.) by the user is selected (step 10). The fax machine scans and reads the document (step 11). Image data is processed by binarization or dithering or the like in accordance with the mode selected by the user (step 12). The processed data is stored in the memory device (step 13). After the other party's facsimile and transmission rotation to communicate are connected, information exchange with the other model is performed (step 14). At this time, the parameters of the image data to be transmitted, that is, the resolution (200dpi, 300dpi, 400dpi) and data on the paper size are exchanged with the relative model to recognize the information necessary for image processing of the relative model. Then, the parameters of the image data stored in the memory device are compared with the relative model (step 15), and if the contents of the parameter match the relative model, the image data is transmitted through the transmission control unit immediately. If it is determined that it is not possible to perform the second resolution conversion (step 16) in accordance with the capabilities of the other model and then transmit.

The conventional method scans an original to be transmitted first, performs a primary image processing, and then exchanges information about the parameters of the relative model and image data in a state where the transmission line is opened. Deformation of the image data occurs according to the operation, so that a clear image quality cannot be guaranteed on the receiving side, and the larger the amount of data to be converted, the longer the occupation time of the transmission line occurs.

Accordingly, an object of the present invention is to provide an image data processing method for minimizing deformation of data generated by resolution conversion after primary image processing and shortening an internal processing time due to resolution conversion.

In order to achieve the above object, the present invention installs a parameter memory in the transmission control unit of the facsimile to store information about the other party's facsimile number and image processing, and retrieves and analyzes the image data parameter of the other model before the transmission line is opened during the facsimile transmission. To perform image processing.

2 shows a system configuration of a facsimile device for carrying out the method according to the invention. The system has a resolution converting unit 3 between the scanning unit 1 and the A / D converting unit 3 and the image processing unit 4 of the conventional configuration, and stores the encoded data processed by the image processing unit 4. The parameter memory 7 is newly added to the facsimile transmission control section 6 connected to the memory device 5 and the transmission line.

The operation of the transmission control unit 6 coupled to the parameter memory 7 will be described below with reference to the flowchart of FIG. 3.

If the other party's facsimile number is entered in the standby state (step 20), the parameter memory 7 searches for the other party's facsimile number (step 21), and if there is a number, fetches and analyzes the parameters of the stored other facsimile machine model (step 22). ) The original is scanned and read (step 23).

At this time, an image such as resolution conversion / dithering is processed in accordance with the read image data parameter of the counterpart model (step 24), the encoded data of the processed image is stored in the memory device (step 25), and then connected to a transmission line to The transmission information is exchanged with the facsimile device (step 26). As a result of the exchange of the transmission information, it is checked whether the parameters (resolution, paper size) of the image data stored in the memory match those required for image processing of the other model (step 27). If they match, the transmission starts without modification of the image data. If it is different, the second resolution conversion is performed in accordance with the resolution of the other model as in the conventional method, and then transmitted (step 28). At this time, the changed image data parameter is updated and registered in the parameter memory 7 (step 29) to make it available for the next fax transmission.

In the above step 21, if there is no search result of the other party's facsimile number, the method proceeds to the step 23 in the conventional manner, and the subsequent steps 24, 25, 26, 27 and 28 are performed. In this case, similarly to the operation of step 29, the new counterpart facsimile number and the exchanged transmission information are stored in the parameter memory 7 so that a search can be made from the parameter memory for the next communication.

As described above, the parameter memory used in the present invention stores the data of the other party's facsimile number and the other model necessary for image processing, that is, the resolution and the paper format that can be received. Therefore, when the size of the resolution data (G3, G4, 200dpi, 300dpi, 400dpi, etc.) is 1 byte, the paper size is 1 byte, and the other party's fax number is 5 bytes, a total data size of about 7 bytes is required. For example, a memory capacity of 1 KB can store 140 counterpart fax parameters.

As described above, according to the method of the present invention, by using the parameter memory installed in the transmission control unit of the facsimile, processing the image data suitable for the counterpart before the transmission rotation is opened, minimizing the case where resolution conversion occurs after exchanging information with the other facsimile machine. Therefore, the internal processing time and the occupation time of the transmission line can be shortened.

Claims (3)

Inputting the other party's facsimile number to search for the presence of the other party's facsimile number stored in the parameter memory; and when the other party's facsimile number is stored, abolishing and analyzing information necessary for image processing of the corresponding model corresponding to the number; Scanning and reading an original, processing an image according to a resolution and a paper size parameter among information necessary for image processing of the read-out relative model, and storing codes and data of the processed image in a memory device And a step of performing transmission information exchange with a counterfeit facsimile apparatus connected to the transmission line, and transmitting the stored image data. The method according to claim 1, further comprising the steps of: determining whether a parameter of image data stored in the memory device and a parameter required for image processing of a relative model after connecting to the transmission line and exchanging transmission information with a relative fax device; Performing a second resolution conversion in accordance with the resolution of the counterpart when the comparison result does not match; and updating and registering the changed counterpart image data parameter in the parameter memory. . The method according to claim 1 or 2, wherein when the other party's facsimile number is not stored in the parameter memory, a step of scanning an original is immediately read and a subsequent step is performed to transfer the image data. And storing the image data parameter of the other party's facsimile in the parameter memory.