Apparatus and method for character recognition by selecting character region in camera document image captured by portable camera

摘要

1. This invention belongs to the art described in the claims ; The present invention relates to a character recognition apparatus and will way through the character selection area in the character image obtained by a portable camera. ; 2 . Technical Problem to be Solved by the invention ; The present invention, by selecting a character region in the character image obtained by the portable camera recognizes the characters after local binarization, character extracting and character that can improve the recognition performance reader and that its purpose is to provide its way. ; 3. Solution subject matter of the invention ; is in the character recognition apparatus of this invention through the character selection area in the character image obtained by a portable camera, characters for inputting a character image obtained by using a portable camera image input means; Image pre-processing means for pre-treatment to improve the image by the camera character image received via the character image input means; Edge detection means for detecting an edge image for image enhancement, and character image from the image pre-processing means; Expansion means for expanding the pixel (Dilation) to the pixel on the edge image detected by the edge detection means; Virtual character area extraction means for labeling the pixels in the pixel region expansion means for expanding the character image in the extraction region to form a virtual character with a long line over a certain threshold height; Binarization means for performing the binarization for the character region extracted from the virtual character area extracting means; Character extraction means for extracting a character from the character region in the binarization means binary one; Feature extraction means for extracting a feature of the character extracted in the character extraction means; And including a character recognition means for recognizing a character by the characters of a character extracted in the feature extraction means. ; 4. An important use of the invention ; The present invention used to fight and character recognition technology in the field of pattern recognition, image processing technology.