JPS6118382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that scans a document with a photoelectric reader to read characters, etc., and transfers the read data onto a separate sheet of paper using a printer.

This type of document reading and transcription device is used, for example, at a post office as a device that uses a reader to read the sender and recipient information written on mail such as registered mail and automatically transcribes it onto a receipt, which is a separate form. has been done. In this case, the sender and
While the size of the recipient record field is constant,
The size of the sender and recipient written on the original postal item varies. Therefore, in order to transfer and record data in a recording field in an appropriate size, it is necessary to compress the read data appropriately. For this reason, some conventional document reading and transferring apparatuses of this type are provided with a function of varying the data compression rate (reduction rate). However, in the conventional apparatus, the operator visually determines the reduction ratio based on the size of the document (the size of the reading area) and operates a reduction ratio setting switch. Therefore, it is cumbersome to judge the reduction ratio for each document and operate the switch, considerable skill is required to instantly judge the appropriate reduction ratio, and if the reduction ratio is incorrectly judged, the necessary printing may not be possible. There were problems such as disappearing.

This invention was made in view of the above-mentioned conventional problems, and its purpose is not to manually set the reduction ratio by visually judging the size of the original, but to set the reduction ratio manually based on the size of the original read by a reader. An object of the present invention is to provide a document reading and transferring device which automatically determines a reduction rate based on data length and performs transfer.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing the overall structure of a document reading and transferring apparatus according to the present invention. 1 is a hand scanner type reader that is held in the hand and moved over the document 2 in the X direction, and this reader 1 has a one-dimensional image sensor (not shown) such as a CCD combined with an appropriate optical system The image sensor photoelectrically scans two surfaces of the original at high speed repeatedly in a direction Y perpendicular to the hand scan (movement) direction X of the reader 1.
As a result, the reader 1 reads two-dimensional X- and Y-dimensional graphic data on two sides of the document.

Further, the reader 1 is provided with a length measuring roller 3 which is rotated by moving the length measuring roller 3 in the X direction, and from the rotation of this length measuring roller 3 a movement pulse, which will be described later, is generated.

The reading control circuit 4 controls the entire operation of the reader 1, and controls the scanning of the image sensor,
Outputs read data SD obtained by appropriately preprocessing the video signal obtained from the image sensor, and
A data synchronization clock DCK synchronized with this read data SD is output. Based on the rotation of the length measuring roller 3, the reading control circuit 4 generates one shot every time the length measuring roller 3 is rotated by a small fixed angle, that is, every time the reader 1 is moved by a small fixed distance in the X direction. Outputs a moving pulse HSC that generates a pulse.
Furthermore, the reading control circuit 4 issues a reading start signal (not shown) in conjunction with a switch operation, etc., to initialize the necessary circuit sections, and also detects a switch operation, a stoppage of movement of the reader 1, or a margin of a document. Based on this, a reading end signal END is generated and supplied to a print control circuit 5, etc., which will be described later.

Here, the signal form of the read data SD will be explained. The read data SD corresponds to one scan in the Y direction by the image sensor of the reader 1.
The converted 128-bit digital signal is output in series. This 128-bit read data SD is one-dimensional graphic data for one row in the Y direction. Even if the reader 1 is not moved in the X direction, the image sensor scans repeatedly at high speed, and serial read data SD is continuously output. The result is data of 128 bits for each row, which is synchronized with each movement pulse HSC generated by the movement of the reader 1 in the X direction.

The read data SD is written to the first memory 7 without data compression via the write control circuit 6, and is also written in the X and Y directions by the compression circuit 8.
The data is compressed to 1/2 and written to the second memory 10 via the write control circuit 9.
1, the data is compressed to 1/3 in the X and Y directions, and then sent to the third memory 1 via the write control circuit 9.
3 is written.

First, the data synchronization clock and the movement pulse HSC are applied as they are to the write control circuit 6, and these serve as timing signals for capturing the read data SD. In other words, the 128-bit read data SD for one row is clocked in synchronization with the movement pulse HSC.
The operation of sequentially writing data into the memory 7 in a predetermined order in synchronization with DCK is performed every time a movement pulse HSC is generated. Note that the order in which the graphic data that will ultimately represent the two-dimensional X and Y plane is generated in series is not necessarily the same as the order in which the data is supplied to the printer 14 when the graphic data is printed by the printer 14. From the above reader 1,
Read data SD in the order Y ₁ , Y ₂ , Y ₃ , ... (Yi is data for one line of 128 bits each)
However, if a thermal serial printer, for example, is used as the printer 14, and the X, Y two-dimensional data is
When printing in the order _of X ₁ , X ₂ , X ₃ , ... It won't happen. In this embodiment, the above data order is changed by the write control circuit 6, and by reading the data in the memory 7 in the normal address order at the time of printing, the data order required by the printer 14 is achieved. I have to.

Next, the 1/2 data compression circuit 8 will be explained with reference to FIG. 2 showing the details of this circuit. In the compression circuit 8, the read data SD serially output one bit at a time from the read control circuit 4 is sequentially input to a 2-bit shift register 16 using the data synchronization clock DCK as a shift signal. The 2-bit parallel output of this shift register 16 is connected to an OR circuit 17.
When either of the two bits is black data "1", the output of the OR circuit 17 becomes "1". Further, the data synchronization clock DCK outputted from the read control circuit 4 is frequency-divided by a 1/2 frequency divider circuit 18, and the frequency-divided clock becomes a shift signal for the 65-bit shift register 19. The output of the OR circuit 17 is applied as a serial input to this shift register 19, and therefore the read data SD
The output of the OR circuit 17 is read into the shift register 19 every time two bits are generated. That is, one line
The 128-bit read data SD is compressed to 1/2 in the Y direction and sequentially input to the shift register 19 as 64-bit data per row. This shift register 19 has 65 bits, and in addition to 64 bits for one row, 1-bit data for the next row is sequentially stored. Then, the data of the rightmost bit and the data of the leftmost bit of the shift register 19 are data on the same Y coordinate, and the two bits of data at both ends are input to the OR circuit 20. Furthermore, the moving pulse HSC outputted from the reading control circuit 4 is frequency-divided by a 1/2 frequency divider circuit 21, and the frequency-divided signal becomes a latch signal of a latch circuit 22. The output data of the OR circuit 20 is input to this latch circuit 22, and therefore, every time two valid lines of read data SD are generated, the latch circuit 22 also outputs 1/2 of the data in the X direction. Data is compressed to 64 lines per line.
Only one line of bit data is output.

The read data SD ₂ (the amount of data is 1/4) compressed to 1/2 in each of the X and Y directions obtained as described above is sent to the The data is written to the memory 10 of No. 2. This write control circuit 9 has the same configuration as the write control circuit 6 described above, but operates based on the data synchronization clock DCK and the movement pulse HSC whose frequency is divided by the 1/2 frequency divider circuits 18 and 21, respectively. So,
It will be synchronized with data SD ₂ compressed to 1/2 in both the X and Y directions.

The 1/3 data compression circuit 11 is a circuit based on the same principle as the 1/2 data compression circuit 8 described above, and is similar to the 1/3 frequency division circuit 2.
It operates based on the data synchronization clock DCK whose frequency is divided to 1/3 by 3 and 24 and the movement pulse HSC, and first compresses the read data SD to 1/3 in the Y direction, and then compresses it to 1/3 in the X direction. and outputs data SD ₃ compressed to 1/9 the amount of data. This data SD ₃ is 1/3 frequency divider circuit 23, 24
The write control circuit 12 operates based on the signals DCK and HSC frequency-divided by the third memory 1.
3 is written.

Further, the moving pulse HSC frequency-divided by the 1/3 frequency dividing circuit 24 is counted by a length measuring counter 25, and the moving distance data X _L of the reader 1 is stored in this counter 25. Note that if there is a circuit in the write control circuit 12 that has the same function as this counter 25, it can be used.

Here, the capacities of the memories 7, 10, and 13 will be explained. In this embodiment, the memory 10 has 1/2 the capacity of the memory 7, and the memory 13 has the capacity of the memory 7.
The capacity has become 1/3. Since the data DS ₂ compressed to 1/4 of the data amount is written to the memory 10, the graphic data of twice the length (the moving distance of the reader 1) of the memory 7 is written to the memory 10. Can be stored. Similarly, memory 13 has 3 of memory 7.
It is possible to store graphic data that is twice as long.

Now, when the reading of the document 2 by the reader 1 is completed, the reading control circuit 4 outputs a reading end signal END, and in response to this, the print control circuit 5 (consisting mainly of a microprocessor) starts operating. Start. First, data on the length X _L (the moving distance of the reader 1) in the X direction of the graphic data counted as described above by the length measurement counter 25 is sent to the print control circuit 5 via the interface circuit 15.
Incorporate into. The control circuit 5 stores the maximum length l ₁ of graphic data that can be stored in the first memory 7 and the maximum length l ₂ (=2l ₁ ) of graphic data that can be stored in the second memory 10.
is set in advance, and the length measurement counter 25
Compare the length X _L taken from the reference value l 1 and l 2 with each reference value l ₁ , l ₂ . Then, when X _L ≦l ₁ , that is, when all the read data SD is stored in the first memory 7, the print control circuit 5 selects the first memory 7 and prints the data via the interface circuit 15. The data stored in the memory 7 of 1 is read out in the order of predetermined addresses, and is sequentially supplied to the printer 14, which prints (draws) the read graphic data on a predetermined sheet of paper. In addition, in the case of l ₁ <X _L ≦l ₂ , the read data SD overflows the first memory 7, but the read data compressed to 1/2 in both the
When all data are stored in the second memory 10 in the form of SD ₂ , the print control circuit 5 stores the data in the second memory 1
0 is selected, and the data stored in the second memory 7 is sequentially read out via the interface circuit 15 and supplied to the printer 14 for printing. Furthermore, _XL >
l ₂ , that is, when the read data SD ₂ also overflows the second memory 10, the print control circuit 5 stores the read data SD ₃ compressed to 1/3 in both the X and Y directions. 3 memory 13
is selected, and the data stored in the third memory 13 is sequentially read out via the interface circuit 15 and supplied to the printer 14 for printing.

As explained in detail above, according to the document reading and transferring device according to the present invention, the read data is stored in the memory even in a compressed form as the reading progresses, and when the reading is completed, the length of the read data (the movement of the reader distance)
A memory storing data that provides an appropriate reduction ratio is selected in accordance with the image data, and the data stored in the selected memory is transferred onto a predetermined sheet of paper by a transfer device.
That is, an appropriate reduction ratio is automatically selected according to the reading length, and printing of an appropriate size is performed in a storage field of a fixed size on the transfer paper. Therefore, as described above, all the inconveniences and inconveniences of the conventional apparatus in which the reduction ratio is determined by visual judgment based on the size of the document and manually set are eliminated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the entire document reading and transferring apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a 1/2 data compression circuit. 1...Reader, 2...Document, 3...Length measuring roller, 4...Reading control circuit, 8...1/2 data compression circuit, 11...1/3 data compression circuit, 7, 10,
13...Memory, 5...Print control circuit, 14
...Printer, SD...read data, DCK...data synchronization clock, HSC...movement pulse.

Claims (1)

[Claims] 1. The image sensor is moved onto the original in a direction X orthogonal to the operating direction Y of the built-in image sensor, and
a reading means for reading XY two-dimensional graphic data; a movement pulse generator for outputting a movement pulse each time the reader is moved a certain distance in the X direction; a plurality of data reduction circuits that capture the moving pulse in synchronization with each other and reduce the data at different figure reduction ratios; a plurality of figure data memories that store the respective reduced figure data; a figure size measuring circuit that measures the figure size on the document by counting; and a figure size measuring circuit that measures the figure size on the original by counting; based on the measured figure size and the size of the transfer area, the reduction rate required to fit the figure in the transfer area is determined by each of the above reduction rates; an optimum reduction ratio selection means for selecting from among; printer control means for reading figure data from the memory corresponding to the selected reduction rate, controlling a transfer printer based on the data, and transferring the read figure into the transfer area; A document reading and transferring device characterized by comprising: and;