JPS6039277A - Peak value correcting system - Google Patents

Abstract

PURPOSE:To quicken a processing speed by correcting a peak data so as to arrange a peak value to a prescribed value to provide to a character recognizing means in a character recognizing device. CONSTITUTION:The peak data is read from a peak data storage means 1, the data is corrected by a peak value correcting means 2 so that the peak value is arranged to the prescribed value to provide to a character recognizing means 3 and to recognize the character. A read data is stored in a read data storage means 4, the read data is read from the means 4 and the peak is detected by a peak detecting means 5. Then the peak data from the means 5 is stored in the means 1. Since the peak data is given while being corrected so that the peak value is arranged to the prescribed value in this way, the no repetition of peak detection is performed by changing a noise slice level to the same read data, thereby quickening the processing speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a peak value correction method used in a character recognition device.

Conventional character recognition devices read magnetic ink characters on a medium using a magnetic head to create read data, which is then sliced at a certain noise slice level to remove small peaks such as noise, and then read into data up to 70 mm in size. Once stored in memory, the characters were read and recognized from the contents of this memory. The size of the read data from the magnetic head varies by 3 to 10 times depending on the type of magnetic ink character, the contact state between the magnetic head and the medium, etc., so if the character cannot be recognized, the noise slice level must be changed. Then, by slicing the Su-Dotator again at that noise slice level, peak detection is redone and character recognition is performed again. However, with this character recognition device, the noise slice level is changed many times and bleed detection is repeated until character recognition is achieved, so the processing speed slows down and stalls.

SUMMARY OF THE INVENTION An object of the present invention is to provide a peak value correction method in which character recognition is performed by aligning peak values to a constant value in order to increase processing speed.

The present invention will be described in detail below with reference to the drawings.

The structure of the present invention will be explained with reference to FIG. 1. In the character recognition device, the peak take is read out from the peak take storage means 1, corrected by the correction means 2 so that the peak value is equal to a constant value, and then sent to the character recognition means 3. Perform character recognition.

Here, the lead-take is stored in the lead-take storage means 4, and the totator is read out from the lead-take storage means 4, and its peak is detected by the peak detection means 5, and the peak data from the peak detection means 5 is read out. is stored in the peak data storage means 1.

FIG. 2 shows an example of a character recognition device to which the present invention is applied,
FIG. 3 is Norture 1 showing the program.

In this example, magnetic ink characters are read and recognized from a medium consisting of a cart, and the card is fed at a constant speed by a car feeding mechanism, and the magnetic ink characters on the card are read by a magnetic head. The output signal of the magnetic head 11 is amplified by an amplifier 12, noise is removed by a filter 13, and converted into a digital signal by an analog/digital converter 14, which is input to the data memory as a read/take signal. The central processing unit (CPU) 1.6 takes in the take from the analog/digital converter 14 by interrupt processing at regular intervals, that is, reads the take from the analog/digital converter 14 stored in the read-only memory (FROM) 17 as shown in FIG. )
By executing the data capture program shown in FIG. 1 at regular intervals, the take from the analog/digital converter 17+ is captured and stored in the take memory 15 at X7.

C)'U16 executes a main program including a peak detection program and a peak value correction block as shown in FIG. 3(a), which are stored in the ROM 17.18. That is, when the peak detection program is executed, takes are sequentially read from the take memory 15 to detect whether or not they are peaks. stored in the data memory 19.

Here, the above address indicates the position of the peak, and the peak value indicates from which position on the card the take was read.

Next, in executing the peak value correction program, the peak takes are sequentially read out from the peak take memory 19, and the peak values are compared with set values, for example, 7AH and 86H. As shown in FIG. 4, the character reading signal from the filter 13 is digitized by analog/digital conversion zH4+I+ so that the zero level becomes 80H, and the above set value 7 is applied.
AH, , 86H are positive and negative noise slice levels. The peak data memory 19 also read out the peak data.
If the peak value is between 7 All and 8 (311), round it down, and if so, compare the peak value with a preset standard 1゛1 [7 with the reference value of lever]. The corrected peak value and its address are stored in the correction take memory 20 as correction data so that they have the same size.The data value 15, the peak take memo January 9, and the correction data memory 20 are random. access memory (RAM) 2] (→1111).If the peak take is corrected for one character, the CP
6 executes a character recognition program stored in the ROM 23 and shown in FIG. 5. That is, the correction take is read from the supplementary 11-data memory 20, and a character code is created from the addresses of peak values that are the same size. This character code is a code consisting of an array of peaks corresponding to the magnetic ink characters on the cart, and is compared with a plurality of character codes stored in advance in R01VI23, and if it matches any of them, it is read by the magnetic head 11. It is determined that it is a character and displayed on a display device (not shown). If a match cannot be found, it is determined that the character cannot be recognized and [? " is displayed on the display device δ, and character recognition for one character is completed.

As described above, according to the present invention, in the character recognition device, the peak take is corrected so that the peak value is equal to a constant value and applied to the character recognition means, and the noise slice level is changed for the same one take. This eliminates the repetition of peak detection sounds and increases processing speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining the present invention in detail, FIG. 2 is a block diagram showing an example of a character recognition device to which the present invention is applied, and FIG.
, FIG. 4 is a waveform diagram showing a character reading signal of the same device, and FIG. 5 is a flow chart showing a character recognition program of the same device. 2- #+li +1=means. /7I5v andto2) (t,))

Claims (1)

[Claims] A read data storage means for storing read data, a beak detection means for reading read data 5 from the read data 31 storage means and detecting a beak, and a beak data storage means for storing the beak data detected by the beak detection means. , a character recognition means for reading characters from peak data, and a character recognition means for correcting a peak value indicated by the peak data according to a preset reference value in the character recognition device, the correction means for correcting the peak value indicated by the peak data according to a preset reference value; Beak data record 1. α, read the beak data from the means and bean 1
A peak value correction method characterized in that Jj is added to the first stage of character recognition by correcting Jlll so that the correction is constant at 1;11.