Ocr Isbn Application Example - Honeywell 2020 User Manual

checking scheme used in MSI Code and in Code 32 Pharmaceutical (PARAF).
To apply this weighting scheme, set the OCR check character to
"0123456789x2x1" or scan the following symbol:
Example: Scan the 2-1-2-1 Weighted Modulo 10 Check Character symbol. Also
enter the OCR template:
Then scan the string below:
The reader performs the check character computation below:
(0 x 1 + 1 x 2 + 2 x 1 + 8 x 2 + 4 x 1 + 5 x 2 + 4 x 1) modulo 10
= (0 + 2 + 2 + (1 + 6) + 4 + (1 + 0) + 4) modulo 10
= 0
Since the result is zero, the message is considered to be valid, so the reader
outputs the message: 012845

OCR ISBN Application Example

One application of OCR is to read the ISBN characters typically encoded using
the OCR-A or OCR-B font. This is especially useful when the ISBN number is
not encoded in an EAN-13 bar code. The following example shows how to con-
figure the image scanner to read the ISBN strings on books in Japan. After you
have followed the steps below, you will be able to scan the following ISBN num-
ber or the additional data below it, depending on the line of text at which the
image scanner is aimed.
1. Scan the OCR-B On
2. Program the user-defined variable "g" to comprise the ten digits plus the
dash:
2-1-2-1 Weighted Modulo 10
Check Character
ddddddc
0128454
bar code on page 9-2.
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