METHOD AND APPARATUS FOR AUTOMATIC TEXT SEPARATION USING AUTOMATIC ELECTRONIC FILTERING OF MULTIPLE DROP-OUT COLORS FOR OPTICAL CHARACTER RECOGNITION OF PREPRINTED FORMS

摘要

Method and apparatus for the separation of text from previously printed material based on the assumption that text used to fill out business forms can be categorized as "carbon based" and that such text would pass as black regardless of any color filters employed. Text can be separated from any pre-printed color information by applying an "all-color filter".