JPS6118258A - Picture processor - Google Patents

Abstract

PURPOSE:To prevent missing of picture by dividing picture information and transmitting the result when a count value is a prescribed value. CONSTITUTION:When reading of an original is started by a read section 201, a line signal 2-2 is transmitted to a control section 207. The control section 207 increments the content of a register LIN one by one every time a line signal 202 is detected and when all character picture information is finished to be transmitted to an MH coding circuit 204, the picture signal is transmitted to the circuit 204. When an end signal is detected before the content of the register LIN reaches 2377 lines, a page end code is inserted and the read original is divided into 2 pages and the result is transmitted.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to an image processing device.

[Prior art]

Modern image processing devices, such as facsimile machines, have slow data transmission rates (and low resolution (M elemental density) when reading originals optically), so many use pulse motors to scan originals. While reading,
The pixel information read was encoded in real time and sent over the line.

In such facsimile machines, the image for one page is longer than a standard recording paper, and when processing a long document such as dividing it into two pages and sending them, the motor that transports the document is temporarily turned off. We had no choice but to rely on a mechanical method in which the motor stops, transmits the information read so far as one page, and then starts the motor again to read and transmit the remaining portion of the document. In addition, since such facsimile machines mainly use roll paper on the receiver side, there are many cases where there is no limit to the sub-scanning length of the document to be sent, so there is no particular need to divide pages on the sender side. Ta.

However, recently there has been a demand for more sophisticated functions such as high resolution, high-speed transmission, halftone expression, etc. To achieve this, the amount of data to be handled has increased, and at the same time, it has become necessary to process pixel information at high speed.

As a result, in order to match the original reading speed and the high-speed processing capability of the encoding circuit, or the processing capability of the encoding circuit and the data transmission speed to the line, screen memory for temporarily storing and accumulating image data is required. A high-speed facsimile machine has been developed. Many of these devices use electrostatic recording printers that use fixed length recording paper to ensure high quality images on the receiver side. Due to this background, transmitters often have a limit on the length of a document in the sub-scanning direction. Therefore, if a document whose length in the sub-scanning direction is longer than the length of the fixed-length recording paper on the receiver side in the sub-scanning direction is read and sent, the image portion that is longer than the limit length of the document will be deleted and recorded on the receiving side. there is a possibility.

〔the purpose〕

Therefore, the present invention has been made in view of the above points, and an object of the present invention is to prevent image loss on the receiving side. [Embodiment] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Explain an example.

The apparatus according to this embodiment reads originals up to 44 versions long in the main scanning direction, adds a page number to the read image information, performs MH encoding, stores it in the screen memory, and reads out the page data from the screen memory. This is a facsimile machine that sends data over the line. The linear density in the sub-scanning direction is f3 jiH6
/m, and the length in the sub-scanning direction exceeds 44 plates, that is, the number of sub-scanning lines is 8 tine X 297 (m+) = 2
When a document exceeding 376 jines is read, it is divided into two pages and sent as shown in FIG. Further, as shown in FIG. 1, information obtained by adding a suffix number to the page number of the first page is added to the divided second page.

FIG. 2 is a block diagram showing the configuration of this device. Reference numeral 201 denotes a reading circuit, which is a known circuit connected to the CCD image sensor, and while reading one line of data, sets the line signal 2-2 to H and notifies the control unit 207. When a document is detected, the document detection signal 2-8 is set to H and the control unit 207 is notified. When the control section receives a reading start signal 2-1, it starts reading the document, and when reading and printing are completed, it notifies the control section of a reading end signal 2-3. A binarization circuit 202 is a known A/D converter that converts analog image information transferred from the reading unit 201 into a white/black binary electrical signal. 2-03 is a multiplayer I, which selects either data from the binarization circuit 202 or data from the CG circuit 206 and sends it to the MH encoding circuit 204, which will be described later. Please note that this is CG
When the start signal 2-4 is H, data from the CG circuit is selected, and when it is L, data from the binarization circuit 202 is selected. 204 is an MH encoding circuit, which is a known code compression circuit that converts black and white binary pixel data into a run-length code and then performs MH encoding; When the rising edge changes from L to H, the operation starts at the rising edge, and when the RTC insertion command 2-6 is received from the control unit 207, the page end code (RTC:
Two consecutive EOLs) are generated, and the encoding operation ends. The output data of the MH encoding circuit 204 is written to the screen memory 205 by the screen memory write pulse 2-7. This screen memory write pulse 2-7 is M
One bit is generated for each bit of the H code. Reference numeral 205 denotes a screen memory, which is a known memory circuit composed of RAM. 20
Reference numeral 6 denotes a CG circuit, which is a well-known character generator circuit composed of a ROM circuit storing character information, and the character designation by the control unit 207 is selected in advance by the CG upper set number 2-5. For example, the character information set by the CG start signal 2-4 is 8Li.
24 lines at ne/II+ line density (approximately 3 wax
) is transferred to the M H encoding circuit 204. 208 is a transmitting circuit for transmitting image information, and 209 is a control signal transmitting/receiving circuit.

Each is a known line interface circuit.

The control unit 207 is a microcomputer/ROM/RAM
This is a CPU circuit consisting of two parts.

FIG. 3 is a timing chart of main signals, and FIG. 4 is an operation flowchart of the control section. This will be explained below with reference to FIGS. 3 and 4. However, LIN, X, CHR in Figure 4
indicates the address value of the AM variable storage area in the control unit, (X) indicates the contents of the mother address X, and indicates character data. For example, 'P, (X)-1' represents the character P, 1-1 when the content of address X is 1.

The control unit 207 first transmits a transmission request signal to the line via the control signal transmission/reception circuit 209 (step 401). When the receiver receives a signal from the line, it transmits a reception command signal to the line again (steps 402, 403). In this way, the preparation for transmitting the image signal is completed.

Next, set the CG start signal and RTC insertion command signal to L, set the line counter register LIN to O,
Page number register X is set to 1 (step 404). Page number information ('P, 1') to be added to the first page is set in the register CHR (step 405).

Next, change the contents of register CHR to CG upper set number 2-5.
The G circuit 206 is notified and the a-take start signal 2-1 is set to H (step 406). When the reading section 201 starts reading a document, a line signal 2-2 is transmitted to the control section 207 as shown in FIG. When the control unit 207 detects the first line signal 2-2, it increments the register LIN't by one and immediately sends the CG start signal 2-4 to HK (steps 407, 408.4L).

09). When the CG start signal 2-4 becomes H, the multiplexer 203 selects the character image information from the CG circuit 206 based on the CG start signal 2-4, and transfers the character image information specified by the register CHR to the line signal 5.
The signal is sent to the MH encoding circuit 204 in synchronization with No. 2-2.

The control unit 207 increments the contents of the register LIN by 1 each time it detects the line signal 2-2, and increments the contents of the register L by 1.
When the content of IN reaches 24, that is, when all the character image information has been transferred to the MH encoding circuit 204, the CG
Set the start signal 2-4 to L (steps 410, 41
1) The multiplexer 203 selects the image signal from the reading section and transfers it to the MH encoding circuit.

That is, the MH encoding circuit 204 encodes the character image information for the first 24 lines in synchronization with the line signal 2-2 and writes it into the screen memory 205, but from the 25th line onwards, the character image information is transferred from the reading section. Image information MH
It is encoded and written to the screen memory 205.

The control unit 207 simultaneously monitors both the reading end signal 2-3 and the line signal 2-2 from the reading unit 201.

If the read end signal is detected before the contents of the register LIN reach 2377 (step 412), the RTC insertion instruction 2 is set to H (step 413) and the MH encoding circuit 205 receives the RTC (page end code). ) is inserted to complete the encoding of one page of the manuscript. Then, after issuing the RTC insertion command 2-6 to L (step 414), increment the register Set the signal to L (step 417) and send a transmission end signal to the line via the control signal transmission/reception circuit 209 (step 418).
When the reception confirmation signal is received (step 419), it is determined based on the document detection signal whether or not there is a next document in the reading section, and if there is a document, the process returns to step 406 and the above operations are repeated. If there is no document, a communication end signal is sent to the line (step 421), and the transmission operation is ended. However, if it is detected that the contents of the register LIN have become 2377 before the end of reading (step 421-1), the MH encoding circuit is instructed to insert an RTC in order to divide the page (steps 422, 423), and the 2nd page Character information vP, 1-1' to be added to the eyes is set in register CHR (step 424), and register LIN is cleared to O (step 425). Then, a transmission end signal is sent to the line (step 426), and when a reception confirmation signal is received (step 427), the contents of CHR (P, 11) are set in the C0 circuit again, and the CG start signal is set to "H" (step 427). Step 406). Thereafter, the latter half of the divided pages are encoded and written into the screen memory by the same operation as described above.

However, in the above method, as shown in Figure 3, 2378
Although the information on the line is completely lost, it is considered that the loss of one scanning line can be ignored.

Incidentally, the procedure of image transmission is shown in FIGS. 5 and 6.

However, Fig. 6(a) shows the case where only one page is transmitted (b).
) is a case where the data is divided into two pages and transmitted.

However, in the above embodiment, it is notified in the facsimile control procedure before image transmission that the receiving device communicating with this device uses roll recording paper instead of standard length recording paper. In other words, if the document is notified by a reception function signal, even if the length of the document exceeds the standard size, it can be sent as one page.

This makes it possible to reduce the communication time with the other party's receiver that uses roll paper. That is, the part A in FIG. 6(b) can be eliminated. A flowchart for the control section in this case is shown in FIG.

This differs from FIG. 4 only in step 722, but otherwise is the same. In step 722, it is determined based on the reception function signal whether the recipient receiver is using roll paper or not, and if it is, the loop is repeated until a reading completion signal is received.

〔effect〕

As described above, according to the present invention, when the number of sub-scanning lines of image information is counted and reaches a predetermined value, the image information is divided and transmitted, thereby preventing image loss on the receiving side. can. In addition, there is a special system that counts the number of lines when the image information is encoded using a configuration that counts the number of lines while reading the image information. ) - code circuit is required (and the configuration can be simplified).

[Brief explanation of drawings]

Claims (1)

[Claims] It has a reading means for reading image information, and a counting means for counting the number of sub-scanning lines of the image information while the reading means is being executed, and when the count value by the counting means reaches a predetermined value, the image information is divided. An image processing device characterized by transmitting images.