Patent Document ID: 4398177
Application ID: 06233386
Patent Status: 1

Claim One:
1. A method for the formation of features for automatic character or object recognition by employment of an opto-electrical transducer which samples the respective character or object column-wise, said transducer being comprised of a series of photo sensors, comprising the steps of: placing output signals of the photo sensors in a following image signal memory as an image pattern matrix comprised of black-white levels and corresponding to the sampled character or object; reading out the stored image pattern matrix analogously to a character sampling at different sampling angles with a respective plurality of section lines numbered for identification for each of said sampling angles; and determining a respective number of intersections resulting between the section lines and the character or object for each section line for each sampling angle in the form of black/white level or white/black level transitions; and utilizing the intersections identified for each sampling angle and section line occurring in such manner for the formation of features for the automatic character or object recognition, said features comprising: (a) a sampling range of the numbered section lines which intersect the respective character at least once for each sampling angle, (b) a sum of the intersections for all section lines for each sampling angle, (c) a center of gravity of the sampling range determined by a quantitative distribution of intersections of section lines for each sampling angle, and (d) a scatter of the intersections within the sampling range related to said center of gravity to determine whether section lines with higher intersection counts lie closer to the edge of a character or closer to the area of the center of the character.