JPS61145964A - Facsimile equipment for transmission and reception - Google Patents

Abstract

PURPOSE:To execute the recording control and the communicating service control by one black picture element number detector by detecting a black number of an original by a black number detector of a recording device. CONSTITUTION:At the time of transmission, original picture information (a) from a reading device 1 is coded by a coding decoding device 6, transmitted through a communicating control part 7 and a line interface 8, and at the time of reception, the transmitted picture information is decoded through a line interface 8 and a communicating control part 7 by the coding decoding device 6, and recording picture information (b) is recorded by a recording device 3. A black picture element number detector 2 provided with the recording device 3 detects the number of black picture elements from the recording picture information (b) and is used to recording control. First, when the first transmitting original is transmitted, a terminal control device 5 detects a page number input '1' set beforehand, commands to the recording device 3 to detect whether or not the next page is white paper, and the read original picture information (a) is sent to the recording device 3 as recording picture information (b). When the above-mentioned result is white paper, the next transmitting original is transmitted to other address, and when it is not white paper, the communication is completed due to an abnormality.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field The present invention relates to a facsimile machine for both sending and receiving purposes, which is capable of detecting the number of black pixels of a document.

■Prior Art Conventionally, in facsimile communication services or encoding technology, it is sometimes necessary to detect the black number of a document.

On the other hand, in recording apparatuses, particularly thermal type recording apparatuses, black number detectors are sometimes used to save power and improve density unevenness.

Detection of black pixels on a document has been carried out by providing a dedicated circuit in a reading device or a control device, but these devices have the disadvantage of complicating the circuit and impairing economic efficiency.

(2) Purpose The present invention aims to eliminate these drawbacks and provides a facsimile machine in which the black number of a document is detected by a black number detector of a recording device.

■Configuration Fig. 1 shows the configuration of an embodiment of the present invention, in which 1 is a reading device, 2 is a black pixel number detector, 3 is a recording device, 4 is a facsimile control device, and 4 is a terminal control device 5, code decoder. The communication controller 61 is composed of a communication controller 7, and 8 is a line interface.

At the time of transmission, the document image information Iaa read by the reading device 1 is encoded by the encoder/decoder 6 and transmitted via the communication control section 7 and the line interface 8.

When receiving, the transmitted image information is sent to the line interface 8.
, is decoded by the encoder/decoder 6 via the communication control unit 7, and recorded image information is recorded by the recording device 3.

A black pixel number detector 2 included in the recording device 3 detects the number of black pixels based on recorded image information. The detection result is used for recording control.

An example of recording control based on the number of black pixels is 1, for example, Japanese Patent Application Laid-Open No. 54-97438. Japanese Unexamined Patent Publication No. 56-106880 is known.

The terminal control device 5 controls the code/decoder 6 and the communication control section 7.

One of the facsimile communication services is sequential transmission, in which different documents are sent to different destinations in a single operation. In order to improve the reliability of this service, it is now possible to input the number of pages to distinguish documents for each destination.

Use a separated manuscript (blank paper). If a discrepancy occurs between the two, it is detected as an abnormality and the communication is terminated.

The following describes the operation when the sequential transmission service is performed with the transmission original, delimited original, and transmission original set in this order. (It can also be effectively used in other communication devices such as white line skipping.) First, when the first transmission document is read and transmitted,
The terminal control device 5 inputs a preset number of pages It
I I+ is detected, the recording device 3 is instructed to detect whether or not the next page is blank, and the read original image information a is sent to the recording device 3 as recorded image information.

Furthermore, since this page should be a separator document, it is not transmitted, and at the end of reading the separator document, the recording device 3 notifies the terminal control device 5 whether or not the separator document is blank.

If the result is a blank page, the terminal control device 5 transmits the next transmission document to another destination, and if it is not a blank page, it is abnormal and ends the communication.

FIG. 2 shows an embodiment of the black pixel number detector, in which 10 is a black pixel detection gate, 11 is a counter, 12 is a CPU, and 13 is a recording head.

The facsimile control device 4 sends recording image information and a transmission clock C to the recording head 13 and the black pixel detection gate 10.

The number of black pixels is counted by the counter 11, and the CPU 12 reads, stores and calculates the number.

At the time of reception, the above-mentioned result is used for recording control, and the head 13 performs recording scanning, and when a blank sheet is detected, the detection result is returned to the facsimile control device 4 without performing recording scanning.

FIG. 3 is a diagram showing the effective area of the original, where A is the effective area and B is the peripheral area of the original.

The reading unit can easily read the periphery of a document as black, so when a blank page is detected, the CPU does not count the document periphery area B in the recorded image information, and if the number of blacks in the effective area A is less than a predetermined amount, it is determined to be a blank page. do.

(2) Effects As explained above, according to the present invention, recording control and communication service control can be performed using one black pixel number detector, and effects such as miniaturization and economical efficiency of the apparatus can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing an embodiment of a black pixel number detector, and FIG. 3 is a diagram showing an effective area of a document. 1...Reading device, 2...Black pixel number detector, 3
...recording device, 4 ...facsimile control device, 5
... Terminal control device, 6 ... Code decoder, 7...
・Communication control unit, 8...Line interface, lO
...Black pixel detection gate, 11...Counter, 12
...CPU, 13...recording head. Patent applicant Ricoh Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) Equipped with a reading device, a recording device equipped with a black pixel number detector, and a control device, using the black pixel number detector,
A facsimile device for both sending and receiving purposes, which is characterized by detecting the number of black pixels of a document. (2) A facsimile device for both transmission and reception as set forth in claim (1), characterized in that an effective area is provided when detecting the number of black pixels of a document.