JPS603065A - Recognizing method of magnetic ink character - Google Patents

Abstract

PURPOSE:To improve a recognition rate by disregarding either of the plus and minus peaks of the amount of magnetic variation when they overlap each other in the same block, and generating two kinds of character codes. CONSTITUTION:Data on the magnetic variation amount of a magnetic ink character is divided into a specific number of blocks by an MPU (microprocessing unit) 11 according to the program in an ROM23, and stored in an RAM22. Then, the plus peak value and its address, and minimum peak value and its address are detected from the read data, and stored in the RAM22. In this case, the address of the 1st plus peak is checked how many block is away from the address of another plus peak and the address of the minus peak to generate a plus code and a minus code, and the read character is recognized from the character code consisting of those two codes. If two peaks overlap each other in the same clock, either one is disregarded and two kinds of character code are generated to recognize the read character.

Description

[Detailed description of the invention] The present invention relates to a magnetic ink character recognition method.

Does magnetic ink character recognition method take into account the amount of magnetic change in magnetic ink characters? I9 [Divide into constants, and determine which (h
7. It detects the corresponding 1゛- in the position, creates a glass beak and a minor 7 coat, and compares the character code consisting of the glass coat tomy + score with the specified character code by 7 to recognize the read character. There is a way to do it. However, with this method, even though each magnetic ink character is designed to appear in one divided area (only one peak appears), abnormal peaks occur due to bleeding of magnetic ink characters, etc. Grass peak and negative peak coexist in 1
- When it comes to (magnetic ink characters? Recognition 1''
I can't do anything.

1 [Emission ψ] is a magnetic ink character 4 that improves the drawbacks mentioned in (1) above and can print the character K la' k even if two peaks overlap in the `` + cutting area of the workpiece due to abnormal peaks. The purpose is to provide a method of understanding.

The present invention will now be explained in detail with reference to Figure 7a:'.

To explain the present invention with reference to FIG. 1, the data on the amount of magnetic change of magnetic envelope ink characters is divided into a predetermined number of blocks, and the blocks at the positions of the positive peak and the negative peak are A plus code and a minus code are created by detecting whether 1- or 1- is applicable, and the read character is recognized from the character code made up of these two codes. And when two peaks overlap in the same block, each -
Excluding the sword, 2) Create a character code of type l* and recognize the read characters.

FIG. 2 shows some of the equipment used in practicing the invention.

This ++ll is a device that reads and recognizes magnetic ink characters (EJ3B) from a medium such as a card such as a check on which magnetic ink characters (EJ3B) are recorded at regular intervals in the horizontal direction. ) 11 is an interface 12 from an external terminal device, etc.
, Peripheral Interface Adapter (hereinafter referred to as PIA)
5) When a read command is issued manually through 13'f,
This is displayed on the display circuit 15 via the PIA 14Y as a semi-completed state. In this state, when a card with magnetic ink characters is inserted into the input field f'L, this card is detected by the sensor 16 and 1. Ru. 84 PLJ
IJ is a card detection signal from Senna-J6 via PiA and L4'Y? When you sense it.

l:'1 Motor f! via A14. ? ! By activating the I control circuit 17 and rotating the motor at a constant speed, this motor feeds the card in the horizontal direction at a constant speed and displays the display circuit J5.
to display that it is running. Magnetism for reading-＼Grot 18
i′! , constant 1)'f, the card of constant speed feeding is relatively fixed at the position and the magnetic ink characters are read. from this magnetic head 18. ㅅe removal signal 1 (starvation change amount 1-)
It becomes a differential waveform and is amplified by the amplifier 19 21. , a low-pass filter 20ij++ is applied to remove noise), and an analog/digital converter 21 converts the signal into digital No. 13. The digital signal YPL from the analog/digital converter 21 is input to MPLJJl.
A single random access memory (hereinafter) is also loaded by capturing data at a fixed time interval (one character is divided into 8 blocks in the card feeding direction, and one block is divided into 8 blocks and 19 blocks). AIVI) 22, the read characters are recognized by performing the processing described later, and the recognized characters are transferred to PIAI 3, Inter 71-S 1.
2, the data is output to an external terminal device case, etc., and displayed or subjected to predetermined processing.

+vt P Ui mouth read only memory (S, F
T! l! The ingredient [1 [part 3]
This is carried out as shown in FIGS. That is, card running 117
．． , the digital signal from the analog/digital converter 21 as shown in FIG. In the above case, it is read at 1bj intervals and stored as read data) in consecutive addresses of tAIV122 (1 (, BLIF). Read all the read data for one card and store it in 1 (, AIVI22). After memorizing it, I start character recognition, but in order to detect the starting point of one character from the lead data, I reveal the character order and start recognizing that character.Read data The positive peak value and its at1/s, and the negative peak value and its ats1/s are detected from the data of one character (data for one character from the above-mentioned character order) and stored in RAM2.
2 and store them separately in the plus table (J-"J'+
+ ) and minus table (Mi'13). Here, 1tAM22 is a 1-node buffer (RBUJ+) in which REIT data is stored, as shown in Figure 8.
), PT13. lVI'J"lJ, plus peak table (PI)'3 people per month minus peak table (
MPTIJ) etc. are allocating it. Next l'TB
, rearrange the contents of MTB in order of the highest peak value.PP'J''B.

M 1) 'J' Stored in J3. In this example, P 'J'
” J3, the first norasbeak f direct and its ato 1/s are P PT B K first VC without changing to 1.
Storage L) From the contents of C, PP 'l'B, and MPTB, take two or three items in descending order of the peak value and put them into the seven-fold atom knife (circle "I'll, ML").
A character code is created using J (at 1 nos with +3uJr) instead of L'B and stored in the code table of uA M 22 -J-. In this case, Grass Beak's at 1/s and Minus Beak's at 1/s are magnetic ink characters, ? When the card is scanned by movement of the card and read by the magnetic head 18, the positive code of the read waveform hidden from the magnetic head 18 is centered at the 1) γ position and the negative beak position.

lGt Create a character code by creating a plus code and a minus code by looking at whether the first plus peak's address 17th, other plus peak addresses, and minus beak's at 1/s are separated by block separation. The code is stored in the pull. However, the first Glassbeak is made up of magnetic ink letters such as ``IJ'' and 5 in the first block of every letter. Next, when the plus peak and minus peak overlap in the same block, this M'FJt
By re-creating the glass code by invalidating the glass peak out of the two peaks, we create a character code with w < 1 consisting of this glass code and the two-note minus code. By creating a negative code by disabling the negative peak in the peak, we create a second character code consisting of this negative code and the positive code that we first created.1- Ru. Here, it is designed so that none of the characters in the peaks appear twice in one block, so if there are two peaks that repeat in the same block, there is a possibility that either n or 10,000 is an abnormal peak. There is a high possibility that either 2'L of the character code stored in memory 1 or the 2nd σ) character code is the correct character code. Next, the above character code is stored in the fixed code table of the ROM 23 in advance (・Compared with the fixed code of the number of filter bags and 1 (・−J'
n or θ) If it matches a fixed code, the read character is recognized as a character of that code.'' is also set to A, M22, and if it does not match the fixed code σ) or F', it cannot be recognized. The characters "?" are set in 7H and AM22, and each character is sequentially recognized from the l)-)' data in the same manner.

FIG. 4 is a flowchart specifically showing the portion of FIG. 3 in which character beginning freezing and beep detection are performed. l(,B
The read data is sequentially read to detect the beginning of the data, such that the read data exceeds a predetermined level for each character for the first time, or 25% of the maximum peak value of the previous character. The moth is detected as the start of data, and this data σ) is set to the address of the start of the letter (Ml-IAIJ) and MHA,,l,l+
70 (hexadecimal number) as character end address (MEAD)
shall be. And 几BUF's IVI I-I AD to M EA I) = Beak 1 shift with the data at E as one character? Detection 1-ru. However, as a measure against noise, data that is less than a certain number of novels is the peak value (it is not subject to extraction. The detected peak value is a plus peak value) - y'LasbeeKi direct and its address 2P' J
,' 43 K cents, and the detected peak value is minor,
7. Add the peak value and its atto 1/s to 'ITB K cents.

Figure 5 (In Figure 3, PTB, IνlT13, σ
12 is a flowchart specifically showing a part of rearranging in descending order of wobeek values. First of all P T H) 7 to 1
7 contents (set the first plus peak value and its at[/s] to J' P T H)' Beater take buffer γ (P J) for all Mw of other addresses of T B
Transfer to B F). Then, 1) Find the one with the thickest peak value from the contents of D B F, and delete this maximum peak value and the address 1PL) from Bl-” -3
- and then P J' T B, and at the beginning of this σ month, < PDBF becomes empty, and then repeats 1 - Pl) T After the second of 13, the peak value is σ) at 1/s. and those with a large peak value (7)
Ill to Senorl-Lte line (.

After all the contents of ``lul'l口3'' are transferred to PDBF, they are similarly set in the order of the largest peak value.

FIG. 6 is a flowchart showing the part of FIG. 3 in which a character code is created. One character ν is divided into 8 blocks and the l block is sampled 8 times and read, but the first half of the first block (4 samplings) and the second half of the rtB block (4 samplings) are always blank and one character is not required. It is qualitatively 7 blocks long. In the reed data, the peak appears only once in one block for any character.1
．． It looks like this, and there are regular glass peaks and minus beaks (there are always two or three in each character. Furthermore, even if the first plus peak 1 window character comes out in the middle of the first block) Magnetic ink letters are composed like this.Lever first cent data (S Jb TD)
= 80 (100001 in binary) 00) and plus ':y -t(PCOL)t;)';t 80
K(! address P of the first glass beak value stored first and second in soto L, l'P'l'H
Calculate the difference between T H (+) and the largest plus peak value at 17th PPTB (wholesale), subtract 4 (half block) from the difference, and divide by 8. Calculate.The result of this calculation Z is rounded down to the decimal point,
This shows how many blocks apart the first plus peak is from the largest plus peak among the other plus peaks. So I added Z to δETDi40.
If you move to the right, the 5ETD will light up on the first glass beak and show how many blocks away the thickest plus peak among the other plus peaks is.
Take ODE and OR and set it on the code table as the first glass code. PP'r13 contains the address PPTB(3) of the third filament key 1.
is the same as ICP P 1' B(1) tP J) TB
(3) Calculate the difference, subtract 4 from the difference, divide by 8, and cut off the decimal point to get 1-. And SE'J,'D
'740 (When the binary number 0100 (1000) is shifted seven degrees and the calculation result is shifted to the right by Z, a large positive peak appears in the second of the first glass beak and the block is separated. We can obtain data showing that R is running.This data is l) C(11)
Take 1y (first plus code) and scoop a, make it the second plus code, and put it in the code table. Regular Grass Peak has 2 or 3 characters in every character, so %PP
'J' 1 3) Set the first glass cord on the cord table, thread one piece of glass cord, and leave it. Moso is unnecessary, so add the second plus code to the code table and create the glass code at the end.
'P L ((1) Create a negative code in the same way based on w, that is, take 2 or 1 or 3 of the M f Nasbeak values in descending order of negative 1 + 111 and write that address +M l
” 'FB(+), ~11 nol' B(2), 1~
41) 'I'I (3) TOP P TB (J) Corner distance f1. Look at the power that is in place, create a chord, and draw seven chords to the knee as shown in Figure 9.

FIG. 7 is a Noro chart that covers the portion of FIG. 3 in which peak duplication detection within the same block, character code re-creation, and comparison with fixed codes are performed. By taking the logic 4'Rk between the glass code and the minus code, it is detected whether a glass beak and a minus peak coexist in the same block. In this case, two plus or minus codes were created and the last one was created (+111
If two peaks do not coexist in the same block, each pair of glass code and negative code on the code table is used. Each character code consisting of a combination is sequentially compared with each identification code on the fixed code table, and if it matches the fixed code of chair fL, the read character is determined to be a character of that fixed code and this code is stored in RAM2.
Cent to z and the match is 9. Is it determined that only one is unrecognizable? Set the code to 1 (, AM22. If two peaks coexist in the same program, for example, the minus code is 010000 (IIJ, and the glass code is normally 0 (IooloJ, but in reality it is 0). If the result is ``ttooooJ, oJ'', then the overlapping bits ``J,,'' are ignored for the valley glass code and the glass code is recreated (
With the above plus code (created at ``10000010J'')
, create a character code for the first building using the code and the minus code, and set it in the code table. Further overlapped bits 111. IIy.

Recreate the minus code by ignoring 1- for each minus code (in the above minus code, roo
ooooooJj) and the first glass code created (of Tj'Z Mi■ by Ze), is this the second type of character code? Create and send 4 cents to Court Cheeple.

Then, read the literary code of the first building, the fixed code of the second character code, and the fixed code of the second character code. It is determined that it is set in RAM22,
Is it a match? fl, Nakerinpo? Code=<Set 1'' in RAM22.

As described above, according to the present invention, when a glass beak and a minus peak overlap in the same block due to an abnormal peak (1-J-ignoring each of the -7i's), a character code of 2-peaches is created and read. -C1
It is possible to improve the recognition rate of the character g, and since the character code consists of a plus code and a minus code, it is possible to simply detect that peaks overlap in the same block.

[Brief explanation of drawings]

Figure 2 is a block diagram showing an example of the device used in the invention of No. 1, and Figures 3 to 7 are flow charts showing the program of the same device. , FIG. 8 shows the memory map of RAM in the device 1-■, and FIG. 9 shows the code table of RAM in the same device. ...RAM, 2
3...1 is also OMo dai 浬人 Kabayama 烹′・,7. ,',',”;Person 1
１・ １ ・ 連 fig (phantom □□”− □□□T−− Up (mouth) Keiq (2)

Claims (1)

[Claims] The amount of magnetic change in the magnetic ink characters is divided into blocks of xr'Jr, and the peak of the magnetic change is 1. In the magnetic ink character Q4 recognition method, which detects and creates a character code and recognizes the read characters, the peak position of the above peak and the height of Mytsunu are 1 and 7 inches apart from fL. )” Create a character code by creating a ras code and a minus code.
When two peaks overlap in the same block in the 10,000 and Kamiayu blocks, remove each of the 1, 1, and 2 peaks to create a character code for 2 buildings and recognize the read characters. A magnetic ink character recognition method.