JPS639421B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image signal processing device, for example, a device that performs processing to create a read data pattern from an image signal obtained by reading printed numbers, characters, symbols, etc. with an imaging device. More specifically, the present invention relates to an image signal processing device suitably used in a system that compares and discriminates a read data pattern with a preset model pattern.

Letters, numbers, and symbols printed by a printer are likely to be crushed or cut, and may also become blurred if rubbed by hand.
Such incomplete characters, numbers, etc. can be determined by reading them with an imaging device and comparing the data pattern created based on this read data with a preset model pattern. There is a risk of misjudgment in some cases.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image signal processing device that creates neat image data by correcting blurring, blurring, cutting, etc. in images of characters, numbers, etc.

An image signal processing device according to the present invention includes an imaging device that scans a paper surface on which characters such as numbers, letters, and symbols are recorded and outputs image signals of these characters, and a level valve that controls the image signals output from the imaging device. A level discrimination circuit separately outputs binarized read data, a plurality of storage areas each storing the binarized read data over a predetermined range of the main scanning line, and the read data is stored in the plurality of storage areas. A memory circuit that stores the data across a plurality of main scanning lines in the sub-scanning direction, and an AND logic of the read data of the plurality of main scanning lines output from each storage area of the memory circuit for each bit corresponding to the sub-scanning direction. The data stored in the memory circuit is updated sequentially in the sub-scanning direction by data of one main scanning line, and the calculation means performs an AND logical operation each time the stored data is updated. do. Here, main scanning refers to scanning in a direction parallel to a scanning line (generally a horizontal scanning line), and sub-scanning refers to scanning in a direction perpendicular to this.

With the above configuration, according to the present invention, the edges of printed numbers, etc. in the direction perpendicular to the main scanning line are adjusted, and a neat image in which crushed, blurred, cut, etc. occurring at the edge of the printed characters is corrected. data can be obtained. Therefore, it becomes possible to accurately perform discrimination processing by comparison with a model pattern.

Examples of the present invention will be described in detail below.

This embodiment relates to positioning of printed lines in a passbook used in an automatic teller machine, a payment machine, and other bookkeeping machines.

As shown in Figure 1, this type of passbook 5
1 has printing paper 53 bound inside the front and back covers 52a and 52b. The printing paper 53 is provided with columns for printing the date, refund amount, deposit amount, and balance. Furthermore, a bar code 54 representing the number of pages is printed in a predetermined margin.

By the way, when a predetermined page of this passbook 51 is opened and inserted into an automatic teller machine, payment machine, or other bookkeeping machine, the bookkeeping machine detects the line to be printed and places the line opposite the print head. Passbook 51
position. To detect this line to be printed,
Conventionally, light was irradiated onto a predetermined area of a bankbook, such as the date column or balance column, and the reflected light was detected using a photoelectric element to discriminate the level. Since lines that have already been printed are relatively black and lines that have not yet been printed are relatively white, it is possible to detect the next line to be printed based on the difference in the level of reflected light. However, when the passbook 51 is bound, the numbers printed on it may be transferred to the facing printing paper side (indicated by A), or the numbers printed on the back side may appear on the printed side (this is caused by Since these areas are relatively black, a detection signal of the same level as the printed line is output. Furthermore, a bar "-" in a date such as "51-8-12" printed on the back surface protrudes like a convex line on the printed surface, causing diffused reflection, which is detected as paper surface noise. Therefore, the conventional print line detection method often causes false detection, resulting in inaccurate positioning of the print line.

Therefore, in this embodiment, an image signal is obtained by scanning a predetermined area of the passbook with an image sensor during the process of transporting the passbook.
This image signal is encoded to create read data, and the previously printed line is detected by comparing and determining the data pattern of this read data with a preset model pattern. The bankbook is positioned based on the line.

In this embodiment, the passbook 51 shown in FIG.
can be used as is, but as shown in Figure 2, a bar code 54 indicating the number of pages can be used.
Instead, a bankbook 50 in which the page number is expressed with 55 Arabic numerals can also be suitably used. It will become clear that the Arabic numeral 55 indicating the page number is also recognized by the device described below.

FIG. 3 shows a passbook transport path 60 provided in an automatic teller machine, payment machine, or other bookkeeping machine. Here, it is assumed that the conveyance path 60 extends in the vertical direction. The conveyance path 60 is constituted by a roller 61 and a belt 62 placed around the roller 61, and the passbook 50 is conveyed in the direction of arrow C (downward) while being sandwiched between the belts 62. Looking into this conveyance path 60 from the import entrance toward the conveyance direction,
Charge-coupled devices (hereinafter referred to as CCDs) 63 and 64 as image pickup devices and passbook position detection switches 65 and 66 are arranged in sequence, and a print head 67 is provided at an appropriate height position. CCD63
is for reading the number 55 representing the page number, and is provided at a position in the width direction where the number 55 passes as the passbook 50 is conveyed (see Fig. 4b). The CCD 64 is for reading numbers printed in the date column, and is provided at a position across the width of the date column. The detection switch 65 is located at a height position that detects the lowest end of the passbook 50 when the lowest part of the bottom line of the printing paper of the passed passbook 50 faces the CCD 64 (see FIG. 4a).
Reading by the CCD 64 starts from the moment the detection signal of the switch 65 is output. The detection switch 66 detects that the top part of the top line of the printing paper is
It is located at the position where it detects the bottom edge of the passbook 50 when facing the CCD 64 (see Figure 4c), and until the detection signal of this switch 66 is output, the CCD 64
If the reading is continuing, this detection signal stops the reading. In this example, CD64 is a primary element with one row of 256 bits.
It is also possible to use secondary elements such as 256 bits x 4. Furthermore, a bucket brigade device (BBD) or a photodiode may be used as the image sensor, and these are arranged in a matrix and driven by horizontal scanning and vertical scanning circuits, so that the printed surface of the passbook 50 is horizontal,
It is also possible to use a two-dimensional image sensor that sequentially reads out data in the vertical direction. As the passbook position detection switches 65 and 66, photoelectric switches, micro switches, etc. can be adopted.

Now, in the date column of the passbook, "52-10-10" and "52
-10-11", "52-11-23", etc., the year,
Numbers representing the month and day and a bar connecting these numbers are always printed on each line (the first
For convenience, in this embodiment, only the year and month and the bar connecting them are read by the CCD 64. CCD "52-11" in Figure 5
64 is shown. The range indicated by the rectangular chain line E is the detection area necessary to recognize "52-11". The horizontal L direction of area E is divided into 256 parts, and each dividing point corresponds to 1 of the CCD64.
Equivalent to bits. If L=10 mm, a resolution of 0.04 mm per bit can be obtained. This is lens 71
(See FIG. 7) can sufficiently achieve this. The image is scanned approximately 30 to 60 times in the vertical D direction. The number of scans may be appropriately determined depending on the conveyance speed of the bankbook 50 and the scanning speed in the horizontal direction. CCD64
One scan of the printed surface is performed at a period of time T3 as shown in FIG. The scanning period T3 includes a scanning period T1 and a pause period T2. For example, scanning of the scanning line S1 is completed within the scanning period T1, and after the pause period T2 has elapsed, scanning is performed on the next scanning line S2 in the next scanning period T1. As the passbook 50 is conveyed, it is sequentially scanned along each scanning line.

In FIG. 7, the passbook insertion detector 74 is composed of a photoelectric switch or the like installed near the passbook insertion slot on the conveyance path 60, and its detection signal is transmitted from a central processing unit (hereinafter referred to as CPU) 70 and a passbook conveyance signal. Sent to 78. When the passbook insertion detection signal is input, the passbook conveyance device 78 drives the rollers 61 to convey the passbook 50 on the conveyance path 60 . After the start of transport, the transport device 78 is controlled by the CPU 70. The feed amount counting device 75 is connected to the roller 6
It consists of a rotating transducer mounted on one axis and generates a series of pulses at a frequency proportional to the transport speed of the passbook 50, for example. This pulse is sent to the CPU 70. The bankbook position detector 76 includes the above-mentioned detection switches 65 and 66, and these position detection signals are sent to the CPU 70 and the drive circuit 77. Drive circuit 77 outputs three phase clock pulses and a scan cycle signal as shown in FIG.
Drives CCD64. Each bit of data is taken out from the CCD 64 for each three-phase clock pulse of the drive circuit 77, and the time series of the image is displayed on each scanning line (main scanning line) S1...Sn...... for each scanning period T1. A signal is output. This time-series signal is amplified by an image amplification device 72 and then sent to a processing circuit 73 as an image signal VOS. The processing circuit 73 is an image signal
Performs the processing described in detail later on the VOS. For this process, a three-phase clock is supplied from the drive circuit 77.
Reference timing signal STR synchronized with the pulse and image input signal INT synchronized with the scan cycle
is sent to the processing circuit 73. Memory 80 has a data pattern area and a model pattern area. As shown in Figure 8, the data pattern area includes a memory location used as a start flag F1, a memory location used as a counter F2 for counting the number of consecutive scans, and a memory location separated into four levels as described later. Each data CMD
Data areas CMA1, CMA2, CMA3, and CMA4 are provided for storing CMD1, CMD2, CMD3, and CMD4. Each of these data areas
CMA1 to CMA4 have a capacity of 256 bits (30 to 60) that can store all data of one detection area E. In the model pattern area, a model pattern of numbers to be printed in the date field that serves as a criterion for determination is set in advance. memory 80
as core memory, read-only memory
ROM, random access memory RAM, etc. may be used, and model patterns may be stored in core memory or ROM, and data patterns may be stored in core memory or RAM. The display device 79 is used to display the pattern discrimination results, and the details will be described later.

FIG. 9 shows a specific configuration of the processing circuit 73. The timing pulse generation circuit 90 generates three types of timing pulses TP1, TP2, and TP based on the image input signal INT from the drive circuit 77 and the reference timing signal STR.
Timing pulse TP1 as shown in Figure 10
is a signal synchronized with the signal STR, and the timing pulse TP2 is a signal whose phase is delayed by half a cycle from the pulse TP1. Further, timing pulse TP3 is outputted every eight pulses TP2 in synchronization with pulse TP1. These timing pulses TP1 to TP3 are all output only while the input signal INT is at H level (scanning period T1).

Now, the image signal VOS from the image intensifier 72 is sent to level discriminators 101 and 10 for level demultiplexing.
Sent to 2,103,104. Each level discriminator 101 to 104 has a different reference level VT.
1, VT2, VT3, and VT4, respectively, and the image signal VOS is level-discriminated and encoded using these reference levels VT1 to VT4, and then inverted and output as level-separated signals CMV1, CMV2, CMV3, and CMV4. FIG. 10 shows the scanning line S1 of FIG.
An image signal VOS1 is shown in FIG. 1, and an image signal VOSn is shown in scanning line Sn. The level of the image signal VOS is high for white parts, and the level becomes lower as the density of black parts becomes higher. Scanning line S1
There is no black part in the niso part, it is all white,
The image signal VOS1 is a uniformly high level signal. The level of the image signal VOSn varies depending on the density of the print. Among the low-level portions of the image signal VOSn, the portion indicated by Z1 has a sharply lowered level and is approaching the black level, so it indicates a portion that is printed clearly. On the other hand, in the portion indicated by Z2, the level of the signal VOSn changes slowly. This part Z2 indicates that the printing is unclear. For example, the printing ribbon has become thin and its printing ability has decreased, or the outline of the printing is unclear as a result of rubbing the printed area with your finger. It appears when you are old. Each reference level VT1~ of the level discriminators 101~104
VT4 has a relationship of VT4>VT3>VT2>VT1, and the reference level VT4 is lower than the white level of the image signal VOS. The level separation signal CMV1 whose level is discriminated by the reference level VT1 represents the image at the division point with the highest density, and the signal CMV
2 represents an image formed by division points having a higher density than the density corresponding to the reference level VT2. Similarly, the other signals CMV3 and CMV4 are at the reference level.
The images each represent an image formed by division points having a density higher than that corresponding to VT3 and VT4. reference level
VT3 is set to a level that corresponds to the density that can be visually read from printed numbers, etc., and is set at a reference level.
Only images darker than the density corresponding to VT3 are subject to print identification, and in that sense the level separation signal CMV3 is used as a critical signal. Level separation signals CMV1-CMV4 from each level discriminator 101-104 are sent to AND gate 105. The AND gate 105 is controlled by the image input signal INT, and the gate is opened when the signal INT is at H level, so during this time each level separation signal CMV1 to CMV4 is
05, and then sent to the next stage edge correction circuit.

The edge correction circuit is a series input series output format 256
Shift registers 111, 112, 113, 114 in which bit shift registers are arranged in four columns
and these shift register groups 111 to 114
The output of each of the four shift registers included in
It is composed of an AND circuit 115 that takes AND logic. In each shift register group 111 to 114, the output terminal OUT of the first shift register
1 is input to the input terminal IN2 of the second shift register,
The output terminal OUT2 of the second shift register is the third
The output terminal OUT3 of the third shift register is connected to the input terminal IN3 of the shift register, and the output terminal OUT3 of the third shift register is connected to the fourth shift register.
Each is connected to the input terminal IN4 of the register. A timing pulse TP1 is input to the shift pulse input terminal T of each shift register in the shift register group 111 to 114, and each shift register reads its input and changes its input at each timing pulse TP1. Contents 1
Shift bit by bit. In the first scanning period T1, the level separation signal CMV1 sent to the scanning line S1 via the AND gate 105 first enters the first shift register from the input terminal IN1 of the shift register group 111, and is output by the timing pulse TP1. The scanning period T1 is shifted sequentially every time.
At this point, the first shift register is filled with 256 bits of data for scan line S1. Next, in the scanning period T1, the level separation signal CMV1 enters the first shift register from the input terminal IN1 to the second scanning line S2, and the scanning line S1 enters the first shift register from the output terminal OUT1 of the first shift register.
Then, the data is outputted and sent to the AND circuit 115 and entered into the second shift register from the input terminal IN2. Then, when the second scanning period T1 has elapsed, the first and second shift registers are filled with data of 256 bits each for the scanning lines S1 and S2. Thereafter, similarly, the level separation signal input every scanning period T1 is input to the first shift register, and the contents of the first shift register are input to the second shift register.
The contents of the second shift register are transferred to the third shift register.
The contents of the third shift register are respectively put into the fourth shift register, and the contents of each shift register are input to each output terminal.
It is sent to the AND circuit 115 from OUT1 to OUT4. Now, with reference to FIGS. 11 and 12, consider the portion surrounded by chain lines F1 to F4 in FIG. 5. Figure 11 is an enlarged view of a portion of Figure 5;
FIG. 12 shows the level separation signal CMV1 obtained by scanning the image shown in FIG. 11, expressed by the symbols "0" and "1". At the time when the (m+4)th scanning period T1 has elapsed, the scanning line S(m+4)~
This means that the data is stored in the first to fourth registers of the shift register group 111 at S(m+1). Then, the (m+5)th scanning period T1
Then, these contents are sent to the AND circuit 115 output from each shift register. The data of scanning line S(m+1) has bits (i2) to (j2) as "1", and the data of scanning line S(m+2) has bits (i3) to (j0) as "1", The data of the scanning line S(m+3) has bits (i4) to (j0) set to "1", and the data of the scanning line S(m+4) has bits (i3) to (j0) set to "1". However, the output of the AND circuit 115 is
Since it is an AND logic, the output of the AND circuit 115 in the (m+5)th scanning period T1 is that only the data of the (i4) to (j0)th bits are "1" as shown by the chain line G1 in FIG. Become. Similarly, in the (m+6)th scanning period T1
The output of the AND circuit 115 is the scanning line S(m+2) to S
Since it is an AND logic (indicated by G2) for (m+5) data, only the (i4) to (j0)th bits are "1", and furthermore, in the (m+7) and (m+8)th scanning periods, the AND circuit 115 The output is (i4)
The bits of ~(j0) and (i5) ~(J0) each become "1" (indicated by G3 and G4). In this way, the special data "1" that appears only in one scanning line, such as the one surrounded by the chain line H, is eliminated.
The edges of printed numbers, etc. in the direction perpendicular to the scanning lines are trimmed. Other level separation signals CMV2~
The edge correction circuit that processes CMV4 performs exactly the same function, correcting any smudges, smudges, or cuts that occur at the edges of the print. Note that data in four adjacent scanning lines will not pass through the AND circuit 115 unless the same bit is "1", so data near the top or bottom of printed numbers will be compressed to some extent, but this will not cause any problems. does not occur.

The modified level separated signals from each AND circuit 115 are respectively sent to the input terminals of an 8-bit shift register 116 of serial input parallel output format. These shift registers 116 shift
Timing pulse TP2 is connected to pulse input terminal CK.
is sent, and the shift register 116 reads the input signal every pulse TP2, shifts each read data, and converts it into parallel data of 8 bits each. The contents of the shift register 116 are stored in a FIFO (First-In-Firsh-File) in 8-bit increments.
Out) buffer registers 121, 122, 12
Sent to 3,124. These FIFO buffer registers 121 to 124 are registers that sequentially store incoming data and send it out on a first-come, first-served basis.They have a capacity to store all the data in one scanning line, and have 32 stages of 8 bits. It consists of Timing pulse TP3, which is output every eight timing pulses TP2, is input to the shift pulse input terminal CK of FIFO registers 121 to 124.
Data from shift register 116 every 8
Read bit by bit and shift the read contents to the previous stage.

With reference to FIG. 13, FIFO registers 121 to
124 has a capacity that can store exactly one scan's worth of data, so when the last timing pulse TP3 of the scan period T1 is sent, the FIFO registers 121 to 124 are filled with data to the full capacity. Therefore, at this time, FIFO register 12
1, the signal FULL is sent to the CPU 70 as an interrupt signal. Then, this interrupt is accepted by the CPU 70, and data input processing from the FIFO registers 121 to 124 is executed. This process is IN
This is done by a command, and first the FIFO register 121
A selection signal SS1 specifying the chip select terminal CS is sent to the chip select terminal CS, and the first 8-bit data of the FIFO register 121 is sent through the data bus 118.
The data is transferred to the accumulator in the CPU 70, and the data area in the memory 80 is transferred from this accumulator to the data area in the memory 80.
Transferred to CMA1. Next, a selection signal SS2 designating the FIFO 122 is output, and in the same way, the 8-bit data at the forefront of the FIFO register 121 is sent to the data area CMA2 via the data bus 118 and the CPU 70. Similarly, selection signals SS3, which sequentially designate FIFO registers 123 and 124,
SS4) is sent, and each FIFO register 123, 12
The first stage data of 4 is in each data area CMA3,
Stored in CMA4. When the data in the first stage of the FIFO register 121 is output, the signal FULL disappears because the FIFO register 121 is no longer full. Also, when the data in the first stage of each FIFO register 121 to 124 is sent out, the first stage becomes empty, so all stored data is shifted forward by one stage, and the last stage (input row) becomes empty. It then prepares for inputting data for the next scanning line. In this way, the data in the FIFO registers 121-124 are sequentially transferred 8 bits at a time to each data area CMA1-CMA1-124.
Transferred to CMA4. Then, during the pause period T2, all 256-bit data in each FIFO register 121-124 is stored in the memory 80. Note that during the pause period T2, only the data in the first stage of the FIFO registers 121 to 124 may be transferred. In this case, the pause period T2 only needs to be slightly longer than the one-time data input time T4, so it can be made very short. In addition, a direct memory access channel device is provided, and when the signal FULL is received, the first address of the data areas CMA1 to CMA4 is specified to the device, and the data in the FIFO registers 121 to 124 is accessed independently of the operation of the CPU 70. sequential data area
It is also possible to input the information to CMA1 to CMA4. In this case as well, if the pause period T2 is longer than one data input time T4, the next scanning period T
At the start of 1, FIFO registers 121 to 124
Since there is an empty space in
It can be stored in registers 121-124. In this way, FIFO registers 121-12
4 is FIFO register 12 regarding data input.
The operations of the preceding stage circuits 1 to 124 and the CPU 70 are separated to ensure efficient processing.

Furthermore, in FIG. 9, a counter 117 counts the number of H level data output from an AND circuit 115 connected to the output side of the register group 113. Since the output of the AND circuit 115 is an edge-corrected signal of the level separation signal CMV3, the counter 117 counts the number of division points whose density is higher than the density corresponding to the reference level VT3.
This counter 117 is reset by the signal FULL when the next scanning period T1 is started.
Since the signal FULL is output every time the scanning of each scanning line ends, the counter 117 counts the number of division points for each scanning. Each output of the counter 117 and the above-mentioned passbook position detection switches 65 and 66 is
Like the FIFO registers 121 to 124, they are read into the CPU 70 by the IN instruction. counter 1
17, switches 65 and 66 are selection signals, respectively.
Specified by SS5, SS6, and SS7.

Next, referring to FIG. 14, by reading the numbers etc. printed on the previous printing line in the date column of the bankbook 50 and identifying the pattern, the next line to be printed on the bankbook 50 is determined from the printing head 67. The operation of positioning the object so that it faces the object will be described below. First, passbook 5
When a predetermined page of 0 is opened and inserted into the insertion slot of the bookkeeping machine (step 1), this is detected by the passbook insertion detector 74 and the passbook transport device 78 is driven, so the passbook 50 is inserted into the transport path 60. Then, it is conveyed downward (step 2). And the selection signal SS
6 to specify the passbook position detection switch 65,
The output state of this switch 65 is read (step 3). If the lower end of the passbook 50 is detected by the switch 65 and a detection signal is output from the switch 65, the lower end of the date column of the passbook 50 is detected.
Since it has reached the position facing the CCD64,
Based on this position, the feed amount counting device 75 starts counting the feed amount (step 4), and at the same time, the CCD 64 starts scanning the date column of the passbook 50 (step 5).

When 256 bits of data are first read in the first scanning line by the CCD 64, these data are stored in the data area of the memory 80 based on an interrupt caused by the signal FULL (step 6). Next, the counter 117 is activated by the selection signal SS5.
is specified, the count value of the counter 117 is read, and it is determined whether the count value is 10 or more (step 7). As described above, the count value of the counter 117 indicates the number of dividing points in one scanning line whose density is higher than the density corresponding to the reference level VT3. For each scanning line, determine whether there is some kind of printed number, etc., or whether it is paper noise.
10, and if there are 10 or more division points, it is determined by printed numbers, etc., and if it is less than 10, it is considered to be noise. At the beginning of the date field scanning, the unprinted white part is being scanned, so the count value of the counter 117 is usually smaller than 10, and the judgment in step 7 is NO, and the process moves to step 8. In step 8, it is determined whether the start flag F1 has already been set. The start flag F1 will be described later, but at the beginning of scanning, the flag F1 is still
is not set, so move on to step 15.
The data stored in the memory 80 in step 6 is cleared. Then, the passbook position detection switch 66 is designated by the selection signal SS7, and this switch 66 is activated.
The output state of the switch 66 is read (step 16), and if the detection signal has not yet been output from the switch 66, the process returns to step 6.

As the passbook 50 is transported, steps 6, 7, 8, 15, and 16 are repeated in the same manner, and the CCD 64
When it reaches the part where is printed, the counter 117
Since the count value becomes 10 or more, the process moves from step 7 to step 17 and flag F1 is set. Then, in order to count the number of consecutive scans after the flag F1 is set, the content of the counter F2 is incremented by one. After this, the process returns to step 6, and while the CCD 64 is scanning the printed area, the steps 6,
Repeat steps 7, 17, and 18.

When scanning of the printed area is completed,
Since the CCD 64 will scan the white area again, the determination at step 7 is NO and the process moves to step 8. Since the flag F1 has already been set, the process moves from step 8 to step 9.
In step 9, it is determined whether the count value of the counter F2 is 20 or more. For scanning lines for which the count value of the counter 117 is 10 or more, the contents of the counter F2 represent how many such scanning lines continuously exist. In step 9, counter 11
If there are 20 or more consecutive scanning lines in which the count value of 7 is 10 or more, it is assumed that numbers or the like are printed in the scanned area, and the process moves to step 10. If the content of the counter F2 is less than 20, it is assumed that there is some kind of dirt or the like rather than numbers being printed, and the process goes to step 15 to clear the stored data. At this time, flag F1 and counter F2 are also cleared, and step 6
Return to and repeat the same process as above.

When it is determined in step 9 that numbers etc. are printed, the determined printed line is the printed line that appears for the first time when looking from the bottom to the top of the passbook 50, that is, the previous printed line of the passbook 50. , the next line to be printed is the previous line viewed from the bottom to the top of this determined print line. In preparation for positioning the next line to be printed, in step 10, the amount of feed from the bottom line of the passbook 50 to the line where it is determined that the above numbers are printed is read from the counting device 75 and stored. .

Next, in step 11, the pattern based on the read data is compared with the model pattern previously set in the model pattern area.
Execute pattern discrimination. Memory 80 data
In the areas CMA1 to CMA4, four types of level-separated data CMD1 to CMD4 are stored in step 6.
It has already been stored by repeating steps 7, 17, and 18. On the other hand, since the model pattern area of the memory 80 stores in advance standard model patterns for numbers printed in the date column, any one of the data patterns, for example, the data CMD3, can be stored in the model pattern area. The pattern is sequentially compared with a large number of model patterns to see if there is a match. To compare both patterns, for example, extract each bit of data that makes up both patterns, determine whether each piece of data matches, find the ratio of the number of matching data to the total number of data, and calculate this ratio by If the value is greater than or equal to a predetermined value, it is assumed that both patterns match.
Instead of comparing data bit by bit, it is also possible to compare data bit by bit. Note that, since there are many types of numeric combinations of year and month, the object of the present invention can be achieved even by comparing either the year or the month, or one digit of the year or month. In the latter case, numbers 0 to 9 may be stored as model patterns. In this way, the data
If the data pattern consisting of CMD3 matches any one of the many model patterns, it is OK (OK), and if the data pattern does not match any model pattern, it is unacceptable (NG).

If it is OK in step 11, the bankbook 50 is positioned at a position where the next line to be printed faces the printing head 67 based on the feed amount stored in step 10 (step 12), and then the bankbook is printed. After performing predetermined printing on the line 50 to be printed (step 13) and clearing the data pattern in the memory 80 (step 14), the passbook 50 is returned (step 20).

If there is transfer A, back transfer B, etc. on the printed surface of the passbook 50, even if the answer in step 9 is YES and it is determined that some number etc. is printed, the data such as transfer A and back transfer B, etc. The pattern is not a valid pattern of numbers, so it does not match any model pattern, and step 11
It is determined that the pattern is not acceptable (NG). In this case, it is impossible to determine the line to be printed, so the display device 79 displays an "unavailable" message.
(Step 19) and return the passbook (Step 20).

If the bankbook 50 is opened on the wrong page and is inserted into the bookkeeping machine with the side completely unprinted open, when the bottom edge of the bankbook 50 is detected by the switch 66, it will be judged as YES in step 16. ,
The passbook 50 is returned (step 20). At this time, since there is no transition to step 10 or later, pattern discrimination is of course not performed.

In pattern discrimination (step 11), data
Although the data pattern consisting of CMD3 and the model pattern are compared, it goes without saying that a data pattern consisting of data CMD1 and/or CMD2 can be used instead of or in addition to this. In this case, data CMD1~
It is also possible to determine OK if all of the data patterns consisting of CMD3 match any of the model patterns. Also each data CMD
Model patterns may be prepared for each of CMD1 to CMD3. Furthermore, in a simpler scheme, the image signal may be discriminated and encoded at one reference level, and this encoded single data pattern may be compared with a model pattern.

In the flow chart of Figure 14, step 7
Since stains and other noises on the paper surface are eliminated in step 9, pattern discrimination is possible only for data from images that are considered to be printed numbers. can. Also, step 7,
If NO is determined in step 9, the data stored in the memory 80 is cleared in step 15, so the capacity of the data area in the memory 80 is only large enough to store the data of one detection area E. It is possible to save memory capacity.

Furthermore, if the image signal from the CCD 63 is processed in exactly the same way as above and the pattern is determined, the passbook 5
It will be easily understood that even if the zero page number is represented by the Arabic numeral 55, it is possible to recognize the number of opened pages. By expressing the page number in Arabic numerals, bar code 5
It is possible to eliminate the sense of strangeness that the user feels when it is expressed as 4. Further, since the balance is usually printed on each line of the passbook, this balance print may be used for positioning the passbook instead of the date. In this case, it is preferable to identify the pattern using the lowest digit (1 yen digit) of the balance. Furthermore, symbols such as alphanumeric characters may be used for pattern discrimination instead of numbers.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the passbook, Fig. 2 is a perspective view showing part of another passbook, Fig. 3 is a side view showing the passbook transport path, Fig. 4 is a front view showing the passbook transport path, and Fig. 4 is a front view showing the passbook transport path. 5
The figure is an explanatory diagram showing a model when printing is read with a CCD, Figure 6 is a time chart showing the scanning cycle, Figure 7 is a block diagram showing the entire print line positioning device for a passbook, and Figure 8 is a memory 9 is a block diagram showing the specific configuration of the processing circuit, FIG. 10 is a time chart showing the operation of the processing circuit, FIG. 11 is an enlarged view of a part of FIG. Figure 12 is an explanatory diagram representing the model in Figure 11 with symbols, Figure 13 is a time chart showing the timing of data input to the CPU, and Figure 14 is a diagram showing the timing of data input to the CPU.
This is a flow chart showing processing by the CPU. 50, 51...Passbook, 53...Printing paper, 6
3, 64...CCD (imaging device), 70...Central processing unit (CPU), 80...Memory, 101~
104... Level discriminator, 111-114... Edge correction shift register group, 115... Same
AND circuit.

Claims (1)

[Scope of Claims] 1. An imaging device that scans a paper surface on which characters such as numbers, letters, symbols, etc. are recorded and outputs image signals of these characters; It includes a level discrimination circuit that outputs digitized read data, a plurality of storage areas that respectively store binarized read data over a predetermined range of main scanning lines, and sub-loads the read data to these multiple storage areas. A memory circuit that stores data across a plurality of main scanning lines in the scanning direction, and an AND logic of the read data of the plurality of main scanning lines output from each storage area of the memory circuit for each bit corresponding to the sub-scanning direction. An image signal processing device comprising a calculation means for calculating, wherein stored data in a memory circuit is updated sequentially in the sub-scanning direction by data of one main scanning line, and an AND logical operation is performed by the calculation means each time the stored data is updated.