Method of selection, especially of selection and erasure of horizontal and/or vertical lines in digitalised facsimiles

Abstract

Abstract Horizontal or vertical series of ones, the lengths of which exceed a specified threshold value are recorded. For selected test dots of each recorded series of ones, a test pattern is extracted consisting of the binary colour values of a set of dots defined in relation to the test dot (referred to below as the index set). From this test pattern, a bit pattern (referred to below as the erase pattern) is derived and at least then copied in an OR operation in a dot erasure facsimile at the place allocated to the test dot, if the erasure pattern contains at least one binary one. This dot erasure facsimile is stored for subsequent evaluation and/or further processing, if required in coded form, at least temporarily and/or in sections. The method provides for automatic adjustment of the threshold value to the character type, identified where applicable in a prior character-recognition operation. <IMAGE>

Inventors

• 👤 Wolfgang Dipl.-Ing. Postl

Bibliographic Details