http://www.kristou.com I share my experience Mon, 07 Dec 2009 07:46:02 +0000 http://backend.userland.com/rss092 en This is a sample code for getting the edges orientation in an image. CvMat *filter_x=cvCreateMat(1,3,CV_32FC1); filter_x->data.fl[0]=-1; filter_x->data.fl[1]=0; filter_x->data.fl[2]=1; CvMat *filter_y=cvCreateMat(3,1,CV_32FC1); filter_y->data.fl[0]=-1; filter_y->data.fl[1]=0; filter_y->data.fl[2]=1; IplImage *img_src=cvLoadImage("name",0); IplImage *img_diff_x=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1); IplImage *img_diff_y=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1); IplImage *img_32f=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1); cvConvert(img_src,img_32f); cvFilter2D(img_32f,filter_x,img_diff_x); cvFilter2D(img_32f,filter_y,img_diff_y); IplImage *magnitude=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1); IplImage *orientation=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1); cvCartToPolar(img_diff_x, img_diff_y, magnitude, orientation, 1); http://www.kristou.com/archives/1258 Convert any media file format (Documents, Images, Audio, Video & Archives) without buying or installing anything on your PC http://www.kristou.com/archives/1254 I like this song because of many reasons. First it is easy to understand. Also it is very moving. I leave the appreciation for you to judge about it. Please share with me your comments. httpvh://www.youtube.com/watch?v=oNxk_6JHIfw wanna be a pop star kimi wo motto muchuu ni sasete ageru kara ne kirakira no pop ... http://www.kristou.com/archives/1237 Today I had a trip to Mountain Tsukuba with TWMC Club. I did not catch them in the beginning. I reached つつじヶ丘(Tsutsujigaoka) station. I got the rope way. It is really scaring view. As you may know, Tsukuba mountain has two picks: One pick is associated with a girl. The second is ... http://www.kristou.com/archives/1212 Recently I needed to delete items from a sequence like a deque , list or vector from a for loop, I figured out that I have to do something like this: for(iter = list.begin(); iter != list.end(); ++iter) { // your code iter = list.erase(iter); --iter; // your code } It looks basic but it took me a ... http://www.kristou.com/archives/1207