hough变换 速度慢 不能滤除无效直线

any help to perform DCT IDCT walsh inverse walsh on image

数字图像处理第三版(冈萨雷斯)附带课件PPT，第七章，英文原版(Digital Image Processing PPT by Gonzalez & Woods(3rd edition)，Chapter 7)

灰度共生矩阵的计算程序，包括子程序，可以用在纹理分析上，还不错(Gray-level co-occurrence matrix calculation procedures, including subroutines, can be used in texture analysis, but also good)

基于灰度矩的亚像素边缘检测，零件边缘提取(Subpixel edge contour extraction)

Aptina ASX340图像传感器设计线路图及datasheet(Aptina ASX340 image sensor design schematics and datasheet)

说明：  彩色图像分割，灰常不错。This function implements kmeans clustering on an input RGB (m x n x 3) image. The user inputs at least two inputs: IMGIN and NCLUSTERS, and this function will step through an interactive color segmentation using kmeans clustering. It is interactive in that the user will be prompted to click-define the target colors in the segmentation.(This function implements kmeans clustering on an input RGB (m x n x 3) image. The user inputs at least two inputs: IMGIN and NCLUSTERS, and this function will step through an interactive color segmentation using kmeans clustering. It is interactive in that the user will be prompted to click-define the target colors in the segmentation.)

分割视图 希望大家多多批评指正 多多交流(segmentation View I hope Members can interact more criticism correction)

拐点的检测，对一个图像的拐点进行检测，使用的是freeman链码的方法，检测图像中拐点的方向，确定该方向是不是拐点。(Inflection point detection, an image of the inflection point for testing, use freeman chain code method, testing the image in the direction of the inflection point, we determine the direction is inflection point. )

检测图片中的角点，将图片读入后转换为灰度图以便处理。 2.通过用Dx=[-1,0,1;-2,0,2;-1,0,1]和灰度图片的矩阵卷积得到灰度图片在x方向上的导数矩阵Ix，矩阵中（i，j）处的元素代表灰度图片矩阵（i，j）处在x方向的导数Ix(Detection of corners in a picture)

说明：  相当的经典啊 是基于matlab的 大家做图像匹配的都可以用的到,做三维重建方面的。(Rather is based on the classic ah matlab we do the image matching can be used for that, so three-dimensional reconstruction.)