OpenCV下车牌定位算法实现代码(一)(2)

162. for( i = 0; i < squares->total; i += 4 ) 163. {

164. CvPoint* rect = pt; 165. int count = 4; 166.

167. // read 4 vertices

168. memcpy( pt, reader.ptr, squares->elem_size ); 169. CV_NEXT_SEQ_ELEM( squares->elem_size, reader ); 170. memcpy( pt + 1, reader.ptr, squares->elem_size ); 171. CV_NEXT_SEQ_ELEM( squares->elem_size, reader ); 172. memcpy( pt + 2, reader.ptr, squares->elem_size ); 173. CV_NEXT_SEQ_ELEM( squares->elem_size, reader ); 174. memcpy( pt + 3, reader.ptr, squares->elem_size ); 175. CV_NEXT_SEQ_ELEM( squares->elem_size, reader ); 176.

177. // draw the square as a closed polyline

178. cvPolyLine( cpy, &rect, &count, 1, 1, CV_RGB(0,255,0), 3, CV_AA, 0 ); 179. } 180.

181. // show the resultant image 182. cvShowImage( wndname, cpy ); 183. cvReleaseImage( &cpy ); 184. } 185. 186.

187. void on_trackbar( int a ) 188. {

189. if( img )

190. drawSquares( img, findSquares4( img, storage ) ); 191. } 192.

193. char* names[] = { \

194. \195.

196. int main(int argc, char** argv) 197. {

198. int i, c;

199. // create memory storage that will contain all the dynamic data

200. storage = cvCreateMemStorage(0); 201.

202. for( i = 0; names[i] != 0; i++ ) 203. {

204. // load i-th image

205. img0 = cvLoadImage( names[i], 1 ); 206. if( !img0 ) 207. {

208. printf(\209. continue; 210. }

211. img = cvCloneImage( img0 ); 212.

213. // create window and a trackbar (slider) with parent \and set callback

214. // (the slider regulates upper threshold, passed to Canny edge detector)

215. cvNamedWindow( wndname,0 );

216. cvCreateTrackbar( \trackbar ); 217.

218. // force the image processing 219. on_trackbar(0); 220. // wait for key.

221. // Also the function cvWaitKey takes care of event processing

222. c = cvWaitKey(0);

223. // release both images 224. cvReleaseImage( &img ); 225. cvReleaseImage( &img0 );

226. // clear memory storage - reset free space position 227. cvClearMemStorage( storage ); 228. if( c == 27 )break; 229. }

230. cvDestroyWindow( wndname ); 231. return 0; 232. } 233.

234. #ifdef _EiC

235. main(1,\236. #endif

原文：http://blog.csdn.net/heihei723/

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