Document image inclination detection apparatus and method

摘要

PURPOSE: To stably detect tilt without affected by a figure, picture, noise, etc., whose complexity is little when compared with a character string part, by detecting tilt of an inputted characters examining complexity of the inputted document. ;CONSTITUTION: A local area extracting part 4 extracts the partial area whose complexity is largest out of the image generated by a black pixel fusion- processing part 3 as a local area La. The local area La can be taken that the most of it is occupied with a character string. A data management part 5, with an intention that following processes are efficiently performed, compresses and manages the image contained in the local area La extracted by local area extracting part 4. A tilt detecting part 6 detects the tilt of the input document image using the data managed by the data management part 5. A deciding part 7, relating to the tilt angle detected by the tilt detecting part 6, decides whether the tilt of the inputted document is corrected or not.;COPYRIGHT: (C)1993,JPO&Japio