JPH03261268A - Facsimile transmission system and its equipment - Google Patents

Abstract

PURPOSE:To improve the transmission processing efficiency even through a transmission line whose line quality is deteriorated by quickening the sending speed of a picture and a scanning lines when lines of a same pattern are consecutive for a prescribed value, encoding the line of the same pattern into a prescribed pattern and sending the result. CONSTITUTION:Lines of the same pattern in a transmission original are consecutive for a prescribed line number or over, the lines are scanned while the picture scanning speed is quickened and the lines of the same pattern are encoded into a prescribed pattern and sent. Moreover, when a prescribed pattern subject to encoding is included from received information in the received picture, it is decoded and the same pattern of the output as the received picture is outputted from the lines only. Thus, even through a transmission line whose line quality is deteriorated, when same lines are consecutive, picture elements are skipped to quicken the transmission speed thereby improving the efficiency of the transmission processing.

Description

[Detailed description of the invention]

[Summary] Regarding facsimile transmission method and its equipment, even if the line quality is poor, the facsimile transmission method skips pixels when the same line is consecutive, increasing the transmission speed and improving the efficiency of transmission processing. The method reads a transmitted document as an image, scans it sequentially, detects that lines of the same pattern are continuous on the transmitted document during scanning, and detects the continuous lines of the same pattern. When lines are continuous for a predetermined value or more, the scanning speed of the image is increased to scan, and the lines of the same pattern are encoded into a predetermined pattern and transmitted, and on the receiving side, the encoded part of the received information is transmitted. When the predetermined pattern is included, it is decoded and only that line is configured to output the same pattern as the received image. The apparatus also includes a transmission image processing means that reads a transmission document as an image, sequentially scans it, and sends pixels, and a reception image processing means that receives a reception image signal, sequentially scans it, processes the image, and outputs it as a reception image. In the facsimile transmission device, a pattern detection means is provided for detecting that lines of the same pattern are continuous in the transmission document,
The transmission image processing means scans the image by increasing the scanning speed when lines of the same pattern are continuous for a predetermined value or more in the transmission document, encodes the lines of the same pattern into a predetermined pattern, and transmits the image. The received image processing means is configured to decode the received information when the encoded predetermined pattern is included, and to output only that line in the same pattern as the received image. do. [Industrial Application Field] The present invention relates to a facsimile transmission method and its device, and more particularly to a facsimile transmission method and its device that shorten transmission time by skipping lines of the same pattern in a transmitted document under predetermined conditions. Regarding. Facsimile is a recording and communication medium that can transmit characters and figures, and is suitable for Japan's use of kanji, and its spread is remarkable and its performance is improving. In particular, there are high expectations these days for devices with high-speed transmission and high-precision image processing functions. [Prior art] As a conventional facsimile transmission device, for example,
There is one described in Japanese Patent No. 1-26370. In this device, when performing fuzzy transmission over a line with a lot of fading and burst noise and poor line quality, images are sequentially scanned and pixels are sent out without image compression. [Problems to be Solved by the Invention] However, in such conventional facsimile transmission devices, in order to deal with deterioration in line quality, images are scanned in order and pixels are sent without image compression etc. Because of this structure, when the same line is continuous, for example, even if there are several consecutive all-white lines in the original to be sent, a white pixel will be transmitted. However, there were problems in that the transmission time was long, the transmission speed was low, and the efficiency of the transmission process was poor. Therefore, the present invention provides a facsimile transmission system and its apparatus that can increase the transmission speed by skipping pixels when the same line continues even if the line quality is poor, thereby improving the efficiency of transmission processing. The purpose is to [Means for Solving the Problems] In order to achieve the above-mentioned purpose, the fudge transmission system and its device according to the present invention first read the transmission document as an image, scan it in order, and during scanning, transmit When it is detected that lines of the same pattern are continuous on the document, and the lines of the same pattern are continuous for a predetermined value or more, the scanning speed of the image is increased to scan, and the lines of the same pattern are converted into a predetermined pattern. It is encoded and transmitted, and on the receiving side, when the encoded predetermined pattern is included in the received information, it is decoded and only that line is output as the received image in the same pattern. It consists of The apparatus also includes a transmission image processing means that reads a transmission document as an image, sequentially scans it, and sends pixels, and a reception image processing means that receives a reception image signal, sequentially scans it, processes the image, and outputs it as a reception image. In the facsimile transmission device, a pattern detection means is provided for detecting that lines of the same pattern are continuous in the transmission document,
The transmission image processing means scans the image by increasing the scanning speed when lines of the same pattern are continuous for a predetermined value or more in the transmission document, encodes the lines of the same pattern into a predetermined pattern, and transmits the image. The received image processing means is configured to decode the received information when the encoded predetermined pattern is included, and to output only that line in the same pattern as the received image. are doing. [Function] In the present invention, when lines of the same pattern continue for a predetermined value or more in the transmitted document, the scanning speed of the image is increased and the image is scanned, and the lines of the same pattern are scanned in a predetermined pattern (e.g. , M pattern) and transmitted. Further, on the receiving side, when the received information includes the encoded predetermined pattern, this is decoded, and only that line is outputted as a received image in the same pattern. Therefore, even if the line quality is poor, when the same line is continuous, the pixels are skipped, the transmission speed is increased, and the efficiency of the transmission process is improved. [Example] The present invention will be described below based on the drawings. 1 to 4 are diagrams showing an embodiment of a facsimile transmission system and its apparatus according to the present invention. Figure 1 shows the countries in which facsimile transmission equipment is comprised. In this figure, the present apparatus is broadly divided into a sending facsimile device 1 and a receiving facsimile device 2. The transmitting facsimile device 1 includes a reading sensor 3, a processor 4, a scanning control section 5, and an M pattern encoder 6, and the receiving facsimile device 2 includes an M pattern decoder 7,
It consists of a processor 8, a scan control section 9, and a print printer 10. The reading sensor 3 converts the information of the transmitted document into an image.
The processor 4 checks whether all the input pixels of each line are white images, and outputs the white image (as information in the transmitted original) to the processor 4. (corresponding to unnecessary lines of the same pattern), a scanning speed change command is output to the scanning control section 5. The scan control unit 5 scans at four times the normal speed until there are no white lines. The M pattern encoder 6 encodes a plurality of white lines into M patterns for one line, and sends it to the line as an image signal. On the other hand, the M pattern decoder 7 decodes the received image signal and outputs it to the processor 8 only when it is an M pattern, and the pro sensor 8 decodes it and outputs it to the processor 8 when the received image signal is an M pattern.
Outputs the number of print lines to . The scan control unit 9 performs blank feeding without printing for the inputted number of white lines. The print printer 10 prints the received image signal information based on the outputs of the processor 8 and the scan control section 9. The sending facsimile device 1 corresponds to a sending image processing means, and the receiving facsimile device 2 corresponds to a receiving image processing means. Further, the processor 4 has a function as a pattern detection means. Next, the effect will be explained. FIG. 2 is a flowchart of sending facsimile processing. First, when sending, request a line connection to the communication line,
Connect the communication line. Once the line is connected, step S
At step 1, a transmission document is inserted into the apparatus, its image is read line by line by the reading sensor 3, and the image is sent to the processor 4. Next, in step S2, it is determined whether all the pixels of one line inputted by the processor 4 are white pixels, and if they are white pixels, the white line is counted in step S3, and the process returns to step S1. If the pixel is no longer a white pixel in step S2, the process advances to step S4. Therefore, consecutive lines of white pixels are counted and their sum determined. Next, in steps S4a to S4n, the white line count value is compared with 1 to n. When the count value of the white line is 1 or less, the read image is stored in the image memory in step S5, image processed in step S6, and further the image is transmitted in step S7. As a result, the contents of the transmission document are transmitted by facsimile line by line. On the other hand, when the count value of the white line exceeds 1 and is 2, one line is encoded into an M2 pattern in step S8, and the speed of the step motor in the scanning control unit 5 is increased to four times the normal speed in step S9. to scan at 4 times the speed. Next, in step S12, the read image is stored in the image memory, and the process proceeds to step S6. Also, when the count value of the white line is between more than 2 and up to n, encoding to the M pattern and changing the scanning speed are performed in the same way. If so, one line is changed to pattern M in step SIO, the speed of the step motor is changed to four times the normal speed in step Sll, and the process proceeds to step S12. Here, an example of encoding when four lines are white is shown in FIG. In FIG. 3, the fixed pattern M0 is a typical 15-bit random pattern expressed as, for example, "0000100110101111". M, , is a pattern obtained by shifting Mo by n bits, for example, M4 is “00011010111100
01”.Mn is M7 [1] and

This is a pattern that is the inversion of [0]. Therefore, a plurality of white lines are encoded into an M pattern for only one line and sent out, and the feature of the M pattern, which is resistant to noise, is utilized. FIG. 4 is a flowchart of received facsimile processing. First, in step S21, an image signal from the line is received and image reception processing is performed, and in step 322, image processing for restoring the image is performed. At this time, the received image signal is M
The signal is input to the pattern decoder 7 and decoded. Next, in step S23, one line indexing process is performed on the received image, and steps S24a to S24a are performed.
A check is made to determine whether one line determined by 24n corresponds to any of M2 patterns to M patterns. If none of the above applies and the received image is an image signal, in step 325, the print printer 10, which is a thermal printer, prints each line and outputs the received image. On the other hand, if it corresponds to the M pattern rather than the image signal, printing is skipped. For example, if the determined one line is the M2 pattern, 2 is input as the number of printing white lines to the scan control unit 9 in step 326. Then, the paper feed count of the print printer 10 is set to 2 and the process proceeds to step 328. Also,
The one line I determined is M. If it is a pattern, the scan control unit 9
Enter n as the number of white lines to print in the printer 10.
The process advances to step 328 with the 0 paper feed count set as n. In step S28, the speed of the step motor in the print printer 10 is changed to four times the normal speed, and in step S32
Proceed to 9. In step S29, recording paper feeding processing in the print printer 10 is performed, and this process continues for the number of paper feeding counts. As described above, in this embodiment, when there are two or more consecutive white pattern lines in the transmitted information, the image scanning speed is increased four times and the white pattern line is scanned at a predetermined speed. It is encoded into M patterns and transmitted. Furthermore, on the receiving side, when the received information includes the encoded M pattern, printing of only that line as the received image is stopped and the line is skipped. Therefore, even if the line quality is poor, the transmission process for that pixel is skipped when there are consecutive white pattern lines, which increases the facsimile transmission speed and improves the efficiency of the transmission process. be able to. In particular, in this embodiment, the scanning time and transmission time are 1/4 of the normal maximum values. Further, even if the line quality is poor, the M pattern, which is resistant to noise, can reliably perform compression processing and take advantage of its advantages. In addition, in this embodiment, skipping and compression of white lines is performed using a typical example of a white pattern as a series of lines with the same pattern in the transmitted document, but the white line is not limited to this, and other lines with the same pattern are (For example, lines with an all black pattern) may be similarly skipped and compressed. In this way, it is possible to further shorten the scanning time and transmission time. [Effects of the Invention] According to the present invention, even if the line quality is poor on a transmission line, when lines of the same pattern are consecutive in a transmission document, the transmission speed can be increased by skipping those pixels.
The efficiency of transmission processing can be improved.

[Brief explanation of drawings]

1 to 4 are diagrams showing an embodiment of the facsimile transmission system and its device according to the present invention, FIG. 1 is a block diagram of the facsimile transmission device, and FIG. 2 is a flowchart of the sending facsimile processing. , FIG. 3 is a diagram showing an example of encoding when the four lines are white, and FIG. 4 is a flowchart of the received facsimile processing. 1... Transmitting facsimile device (transmitting image processing means) 2... Receiving facsimile device (receiving image processing means) 3... Reading sensor, 4... Processor (pattern detection means), 5.
9... Scan control unit, 6... M pattern encoder, 7... M pattern decoder, 8... Processor, 10...・Print printer. 11 Figure 1 is a structural diagram of a facsimile transmission device according to an embodiment.

Claims (2)

[Claims] (1) The transmitted original is read as an image and scanned in order, and during scanning, it is detected that lines of the same pattern are continuous on the transmitted original, and when the lines of the same pattern are continuous for a predetermined value or more, The image is scanned at an increased scanning speed, and the lines of the same pattern are encoded into a predetermined pattern and transmitted, and on the receiving side, when the received information includes the encoded predetermined pattern, This facsimile transmission method is characterized by decoding this and outputting only that line in the same pattern as the received image. (2) A transmission image processing means that reads a transmission document as an image, scans it in order, and sends pixels, and a reception image processing means that receives a reception image signal, scans it in order, processes the image, and outputs it as a reception image. In the facsimile transmission device, there is provided a pattern detection means for detecting that lines of the same pattern are continuous in the transmission original, and the transmission image processing means detects that lines of the same pattern continue for a predetermined value or more in the transmission original. When the image is scanned at an increased scanning speed, the lines of the same pattern are encoded into a predetermined pattern and transmitted; 1. A facsimile transmission device characterized in that the facsimile transmission device is configured to decode the received image and output the same pattern as the received image only for that line.