实现图像的边缘检测,提取图像的特征信息，为后面图像处理做准备。-Image edge detection, feature extraction of image information, preparing for following image processing.

takes an edge map image, and performs the Hough transform for finding circles in the image.

this codes is Source code for face detection of viola paper.of its Features is: Feature Computation: The “Integral” image representation Feature Selection: The AdaBoost training algorithm . Real-timeliness: A cascade of classifiers.-this code