数字图像的边缘检测是图像分割、目标区域的识别、区域形状提取等图像分析领域十分重要的基础-Digital Image Edge detection is image segmentation, identification of the target region, regional shape extraction image analysis based on the importance of field

图像识别与处理,可以进行各种图像的处理与识别，包括颜色、形状处理。-image recognition and processing, various image processing and recognition, including color, shape processing.

形状上下文算法。做好预处理后，使用此算法匹配验证码，识别率非常高，且无视扭曲，变形。-The shape context algorithm. Do a good job pre-treated using this algorithm matches the verification code, recognition rate is very high, and ignore the twisted, distorted.

Hough变换是图像处理中从图像中识别几何形状的基本方法之一。Hough变换的基本原理在于利用点与线的对偶性，将原始图像空间的给定的曲线通过曲线表达形式变为参数空间的一个点。这样就把原始图像中给定曲线的检测问题转化为寻找参数空间中的峰值问题。也即把检测整体特性转化为检测局部特性。比如直线、椭圆、圆、弧线等。 -Hough transform image processing image recognition from the basic geometry of one of the me