JPS60229476A - Facsimile communication system - Google Patents

Abstract

PURPOSE:To suppress the increase in power consumption at a recording section by transmitting white and black level signals while the each level is inverted when a prescribed rate or over of black picture elements are included in picture information on a transmission original and allowing a recording section at the reception side to record the signals. CONSTITUTION:Picture information of the transmission original 1 read by an original reader 4 is stored sequentially in a page buffer 6 via a switch 7, a counter 15 counts sequentially the number of black signals in the picture information for one page's share of the said original and inputs the result to a comparator 17. On the other hand, a counter 16 counts sequentially a pulse of a clock C being a double period of an output signal of a binary-coding circuit 3 and inputs the result to the comparator 17. When black picture elements exists more than 50% in one page of the transmission original, the comparator 17 outputs a high level signal and in other cases, the comparator 17 outputs a low level signal, and when the signal is at high level, binary picture information outputted from a page buffer 5 or 6 is outputted while the white level is inverted into the black level and vice versa logically by means of an exclusive OR gate 9.

Description

[Detailed description of the invention] [Technical field of invention] This invention provides a facsimile communication method.

[Technical background of the invention]

In normal facsimile communication VC, 1+ on the sending side!
The image information of the taken document is transmitted after being subjected to appropriate encoding conversion processing, with white pixels as white signals and black pixels as black signals, and the receiving side decodes the received image signal and outputs the original image. The white pixel information is recorded as white, and the black pixel 1# information is recorded as black.

[Problems with background technology]

However, in such a conventional method, when a thermal recording method, an electrostatic toner type, or an inkjet method is used for recording, if the number of black pixels in the transmitted document increases compared to the white pixels, the number of black pixels in the transmitted document increases. The disadvantage is that the magnetic force consumed by the recording device increases dramatically when the data is restored on the receiving side. Furthermore, in the heat-sensitive recording method, blurring occurs in the white image due to the influence of heat accumulation, and in the electrostatic toner type and inkjet type, the toner and ink consumption amount increases, respectively.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks and provides a facsimile communication system that allows the receiving facsimile device to perform suitable recording operations without consuming a large amount of power even when transmitting a document with a large proportion of black pixels. purpose.

[Summary of the invention]

In this invention, when the sending facsimile device detects that the image information VCph on the scanned original to be sent includes a black signal of a certain proportion or more, it inverts the white signal and the black signal of the image information, respectively. The above object is achieved by transmitting the image information to the receiving side, and by allowing the receiving facsimile machine to record and print the image information as it is even if it receives the black and white inverted image information.

[Embodiments of the invention]

FIG. 1 is an embodiment of the present invention, and shows a sending facsimile machine.

This facsimile machine uses a photoelectric conversion device (COD) 2 that converts the original s1 image into electricity, and a photoelectric conversion device (COD) 2 that converts the photoelectrically converted electrical signal into a black or white image 211! The original sM consisting of the binarization circuit 3 which converts the signal Kfi, and the extraction device 4, each have an original sM.
Page buffers 5H and 6 having a capacity to store image information for one page, switch 7 for switching input to page buffers 5R and 6, switch 8 for switching output from page buffers 5 and 6, exclusive OR gate 9. an encoding unit 1 (1, modem 1 that performs modulation and demodulation to transmit the image information to the receiving facsimile machine by missing the communication cycle i@12); Based on the output of the termination detection section 13 for extracting the pytA section of JQ and Naru, the output is inverted, and the selection of switches 7 and 8 is switched i1 by the output.
Fritzoflotz f14, 211i circuit 3 that performs control
A counter 15 counts the black number of the first picture signals sequentially output from 16. A counter 16 counts the clock signal C with a period twice that of the output signal of the 211 conversion circuit 3.Both outputs of the counter 15 and the counter 16 The nitric acid is equipped with a comparator 017 that compares the values and outputs a signal of Kta level when the output of the counter 15 is large.

In this configuration, the image information of the transmission original 1 read by the original i reading device 4 is sent to the page buffer 76 via the switch 7.
It is stored primary in . At this time, the counter 15
The number of black signals in the image information for one page is counted sequentially, and the count 11M is input to the comparator 17 manually. On the other hand,
The counter 16 sequentially counts the pulses of the clock C having the period twice that of the output signal of the output signal of the circuit 3, and compares the counted values.

When the JJA plucking reader 4 completes the removal of one page of the transmitted document, the end detection section 13 detects this and sends the detection signal to the input terminal of the frig float 7''14 and the counter 1.
5 and 16 and the enable terminal .- of the comparator 17.

This causes the counter 15. N and 16 are reset and alK is initialized, and the busy frig floats! The logic level of the output of 14 is inverted. Due to this reversal, switch 7 switches its contact from page buffer 6 to page buffer 5g11+, and switch 8 switches its contact from page buffer 5 to page buffer 641111K.
Switch. As a result, the output of the 241 conversion circuit 3, that is, the image information of the next R-ji, is now input to the page buffer 5,
Also, for the exclusive OR gate 9, the page buffer 6
The stored contents of K will be output.

On the other hand, the comparator 17 is activated by the detection output of the termination detection section 13, and compares the manually inputted count value of the counter 15 with the count value of the counter 16, and when the count value of the counter 15 is large, the logic level is high. When the count value of the counter 16 is large, K outputs a signal whose logic level is low. That is,
Since the counter 15 outputs the number of black images JR in one page of the transmitted original, and the counter 16 outputs half of the total number of pixels in one page of the transmitted original, the comparison 617 is A high level signal is output when there are more than half of the middle button black pixels on one page, and a low level signal is output otherwise.

The output signal of the comparator 17 is inputted to the 10,000 input terminals of the exclusive OR gate 9, and
An exclusive OR with the image information stored in EasyPad 7A6#C by the VC is sequentially performed. That is, when the output of the comparator 17 is at a high level, the 2M image information output from the page buffer 5 or 6 is output after being logically inverted from white to black and from point to white by the exclusive OR gate 9. When the output of the device 17 is at a low level, the binary image information is output from the button without being logically inverted.

The image information that has undergone such processing is input to the encoding unit 10, and the encoding unit 10 converts it into modified, Yatsumuff, and
After being modulated by a modem 1 which has been subjected to appropriate encoding processing such as a modified read method, it is transmitted onto a communication line 12.

On the receiving side shown in FIG. 2, the damaged image information is demodulated by a modem, and a decoding section 21 performs decoding processing to restore the original 21-fold image information and input it to a recording section 22. The recording unit 4 performs a predetermined recording operation based on the 211 raster information 1cifi input from the decoding unit 2. In other words, I received it! On the side, the white pixel and the black pixel are each reversed by 1
Even when iiiflV information is input, the recording operation is performed in the same state without adding any new processing.

Fifth, in this embodiment, if there are more than half of the black pixels in one image of the transmitted document, the transmitting side inverts the image information in black and white and transmits it to the receiving side, and the receiving side also inverts the black and white image information. The power consumption in the recording unit on the receiving side is reduced by printing the record as it is.

〔Effect of the invention〕

Claims (1)

[Claims] The sending facsimile device reads the image information on the sending document, converts it into black and white (211), binarizes it, and receives it.
The receiving facsimile machine records the received 2-bit signal, and the sending facsimile machine records the image signal consisting of 2fL polarization with a black of more than a predetermined percentage. If it is detected that a signal is included, the white signal and the black signal of the image signal are inverted in black and white, respectively, and the image signal is transmitted to the receiving facsimile device.The receiving facsimile device transmits the received inverted image signal. A facsimile communication method characterized by recording in reverse black and white.