JPH04139957A - Picture information transmitter - Google Patents

Abstract

PURPOSE:To improve the coding efficiency and to reduce the communication time by applying usual coding only to a required area in an original and converting other area into a data such as a white level data. CONSTITUTION:A clock pulse ADCLK is inputted sequentially to a counter circuit 3 in the transmission state. In this case, when the counter circuit 3 counts '120', since the contents of circuits 2,3 are coincident, a low level signal is outputted from a NAND gate IC 13 and a flip-flop IC 18 is reset. Thus, the output of the IC 18 goes again to a low level, the output of an AND gate IC 19 goes to a low level. That is, the part undesired to be sent in the original is converted forcibly into white level information. Thus, the communication time is reduced and the communication cost is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image information transmitting device applicable to facsimile machines and the like.

[Prior Art] In conventionally known facsimile machines, even if unnecessary information is present in a specific area in the main scanning direction for image reading, the entire image including the unnecessary information is Information was encoded and transmitted.

[Problem to be solved by the invention] However, when the unnecessary information contained in the manuscript is dense, the time required to encode the unnecessary information contained in that specific area becomes The problem was that communication time and communication costs were wasted.

Therefore, in view of the above-mentioned points, an object of the present invention is to always convert specific areas of a document into predetermined data (for example, white data), thereby improving encoding efficiency and reducing communication time. The purpose of this invention is to provide a transmitting device.

[Means for Solving the Problems] An image information transmitting device according to the present invention includes means for dividing the entire image area of a document into a valid area and other areas, and only image information obtained by scanning the valid area. The apparatus is equipped with means for outputting the image information as valid image information, and converting other areas into predetermined data and outputting the converted data.

[Function] According to the present invention, normal encoding is performed only on the required area (for example, a predetermined range in the main scanning direction) of the document, and data such as white data is applied to other areas. Since the data is converted, the encoding efficiency of the entire document can be increased.

[Embodiment] FIG. 1 shows a part of the block configuration of a facsimile machine to which the present invention is applied. In this figure, the circuit indicated by "t" is the first position detection circuit in the main scanning direction, which detects the first position in the main scanning direction when reading an image (in the example described below, a position 15 mm from the left edge of the document). ; see FIG. 4) and generates an output pulse (described in detail later).

Similarly, the circuit indicated by "2" is the second position detection circuit in the main scanning direction, and the circuit indicated by "2" is the second position detection circuit in the main scanning direction when reading an image.
position (in the example explained below, 120 degrees from the left edge of the document)
mm position (see Fig. 4) and generates an output pulse.

The circuit indicated by °°3° is a counting circuit that indicates the current position of the reading scan. Clock signal ADC manually input to this circuit
LK is the document reading clock C as shown in FIG.
A clock obtained by dividing LK into 178 is used. In addition, the third
°' DATA l '' shown in the figure is read data output from a reading device (not shown) such as a CCD.

"'10" is an operation panel, which includes a dial numeric keypad, a mode changeover switch to be described later, other operation switches, and a display.

Further, 'DATAI' shown on the right side of FIG. 1 is the read data described above with respect to FIG.

°' DATA 2 output from AND circuit IC19
°° is the image information to be transmitted, and for the valid data area shown in Figure 4, the read data is output as is as valid data (see Figure 2), and the areas at both ends of the valid data area are always white data. is output.

The DATA 2 is encoded using a known encoding method and output to the communication line side.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 to 4.

First, the procedure for setting the valid data area (see FIG. 4) will be explained.

Select the area setting mode using the mode changeover switch included in the operation panel [Phase]. Then, 0UTI1
A 01IT2 switching signal is generated and generation of dial pulses is inhibited. Then, by pressing the numeric keypad, the area data code is output from the 0UT2 terminal.

Signal SHI is a shift command signal, which shifts the contents of each register from ICI to IC3 in synchronization with the 0tlT2 signal. For example, if you specify the valid data area from 15mm to 120mm from the left edge of the document, first enter "1°', then 5°' using the numeric keypad. Then, press the transmission start key (not shown). Press.

Through the above operations, 5°° is input to the ICI register, °1°° is input to IC2, and “°○°” is input to IC3.

Next, the shift command switches from SHI to 5)(2).

Then, use the numeric keypad to enter data in the order of ``1'', ``2°, 0°'', and press the transmission start key (not shown) again. ′°
However, 1'' will be input to IC9.

Numerical information to specify the valid data area (in this example,
15, 120) can be checked by the display (displaying characters and symbols) to see if it has been correctly done manually.

Then, press the operation switch to return the facsimile machine to telephone mode.

With the above operations, preparation for transmission is complete.

Next, the original is set on the facsimile machine, and the facsimile machine is placed in a sending state. Then, the counting circuit 3 (indicating the current scanning position) shown in FIG.
(See Figure 3) is input (.Now, assuming that the interval between reading pixels is 125 μm, the above clock pulse A
DCLK will be generated every pitch.

Therefore, when 15 clock pulses ADCLK are input, the states of registers IC1 to IC3 and IC14 to I
Since the contents of CI6 match, the matching circuits IC4 to I
At the same time, a high level signal is output from C6 (a circuit for detecting a match). As a result, all the inputs of the NAND gate IC+7 become in a state of 1°, and the output of this IC17 becomes a low level.

Therefore, the output Q of the flip-flop circuit ICl3 becomes high level (see FIG. 2). As a result, the output terminal of the AND gate [19 contains the valid data DATA to be transmitted.
2 will be output. Incidentally, at the initial stage of this output data DATA2, the output of the flip-flop ICl3 is at a low level, so the input of the AND gate IC19 is closed and is at a low level (white information).

When the counting circuit 3 counts 120°, the contents of the circuits 2 and 3 match, so a low level signal is output from the NAND gate ICl3, and the flip-flop ICl3 is reset. Since the output of ICl3 becomes low level again, the output of AND gate IC19 also becomes low level (white information).

In this way, according to this embodiment, it is possible to forcibly convert the portion of the document that is not transmitted into white information. It takes a short time to encode the continuous white data. (MR, MH code), communication time can be shortened.

[Effects of the Invention] As described above, according to the present invention, unnecessary areas of a document can be converted into predetermined data and encoded easily, thereby reducing communication time and communication costs. can be suppressed.

In particular, when the format of the manuscript is determined in advance, for example, when there is a lot of content other than the information required on the receiving side, such as a questionnaire form or an estimate, the data in the valid data area is It is extremely effective to be able to send only

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the present invention, Figs. 2 and 3 are timing diagrams showing the operation of Fig. 1, and Fig. 4 is an explanatory diagram of the load movement data area.・
Circuit that determines the start position of area setting, 2... Circuit that determines the final position of area setting, 3... Counting circuit that indicates the position of reading scan, 5... Document, 6... Image sensor 7. ...Light receiving element, IC7-IC9, IC7-IC9...Code register IC4-IC61CIO-IC12...Code coincidence detection circuit, ICl3. IC17...NAND gate, ICl3
...Flip-flop circuit, IC19...AND
Gate, DATA 1...Read data from the image sensor,
DATA 2...Output data. Figure 4

Claims (1)

[Claims] 1) means for dividing the entire image area of a document into an effective area and other areas, and outputting only image information obtained by scanning the effective area as effective image information; 1. An image information transmitting apparatus, comprising means for converting the data into predetermined data and outputting the converted data.