OCR ISBN Application ExampleProduct Reference Guide 8-15OCR ISBN Application ExampleOne application of OCR is to read the ISBN characters typicallyencoded using the OCR-A or OCR-B font. This is especially usefulwhen the ISBN number is not encoded in an EAN-13 bar code. Thefollowing example shows how to configure the imager to read the ISBNstrings on books in Japan. After you have followed the steps below, youwill be able to scan the following ISBN number or the additional databelow it, depending on the line of text at which the imager is aimed.1. Scan the OCR-B On bar code on page 8-3.2. Program the user-defined variable “g” to comprise the ten digitsplus the dash:0123456789-3. In Japan, it is common for two fields to follow the ISBN number,the three digit price field, and the four digit price field. The firstfield typically starts with a “C” (uppercase c), followed by four dig-its. The second field typically starts with a “P” or a yen symbol,followed by three or four digits, followed by an “E.” Program theuser-defined variable “h” to comprise the “P” and the yen symbol(represented by a backslash).P\4. Scan the symbol below to set up three templates to handle theISBN number, the three digit price field, and the four digit pricefield.5. Finally, set up the ISBN check digit, which is a special position-weighted modulo 11 checksum. The imager automatically invokesthe ISBN checksum for template rows that are:1.) at least fourteen characters long,2.) whose first four characters are the letters “ISBN,”3.) whose last character is a check character, and
