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çç©å½¢å½æ°ååï¼void cvRectangle( CvArr* img, CvPoint pt1, CvPoint pt2, CvScalar color,int thickness=1, int line_type=8, int shift=0 );åæ°ä»ç»ï¼img -- å¾å.pt1 -- ç©å½¢çä¸ä¸ªé¡¶ç¹ãpt2 -- ç©å½¢å¯¹è§çº¿ä¸çå¦ä¸ä¸ªé¡¶ç¹color -- 线æ¡é¢è² (RGB) æ亮度ï¼ç°åº¦å¾å ï¼(grayscale imageï¼ãthickness -- ç»æç©å½¢ç线æ¡çç²ç»ç¨åº¦ãåè´å¼æ¶ï¼å¦ CV_FILLEDï¼å½æ°ç»å¶å¡«å
äºè²å½©çç©å½¢ãline_type -- 线æ¡çç±»åãè§cvLineçæè¿°shift -- åæ ç¹çå°æ°ç¹ä½æ°ã
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