Hough变换检测直线，阈值选取对图像灰度化处理，以及空间类聚法，松弛迭代算法-Hough transform detection of a straight line, threshold selection of image processing, as well as space-type polymerization, relaxation iterative algorithm

功能实现：用c#实现数字图像处理中的hough变换功能-Function realization: Using c# digital image processing of the hough transform function

hough变换，把检测整体特性转化为检测局部特性，比如直线、椭圆、圆和弧线等-hough transform to detect the overall characteristics into the detection of local features, such as lines, ellipses, circles and arcs, etc.