关键词: 二值化, 阈值, 灰度值, 纹理特征, 轮廓检测, 字符识别

Abstract: Aiming at the second generation identification card’s character identification，this paper puts forward a method that based on character string’s profile detection.This method firstly adopts texture segmentation of the area of image character，after gaining the area of character，then adopts fluctuation profile concavo-convex character to approximately detect single character’s width，and accordingly choose the steady local character，and use the method about frame sentence identification to identify the character.Through the experimentation of ten pieces of the second generation identification card’s character identification which is screened in the nature scene，this method is proved validity.

Key words: digital binary, threshold, gray scale, texture, profile detection, character identification