{"id":38807,"date":"2025-05-21T10:35:45","date_gmt":"2025-05-21T02:35:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/38807.html"},"modified":"2025-05-21T10:35:45","modified_gmt":"2025-05-21T02:35:45","slug":"%e5%9f%ba%e4%ba%8eopencv%e7%9a%84%e4%ba%ba%e8%84%b8%e5%be%ae%e7%ac%91%e6%a3%80%e6%b5%8b%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/38807.html","title":{"rendered":"\u57fa\u4e8eOpenCV\u7684\u4eba\u8138\u5fae\u7b11\u68c0\u6d4b\u5b9e\u73b0"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u5f15\u8a00<\/li>\n<li>\u4e00\u3001\u6280\u672f\u539f\u7406<\/li>\n<li>\u4e8c\u3001\u4ee3\u7801\u5b9e\u73b0<\/li>\n<li>\n<ul>\n<li>2.1 \u5173\u952e\u4ee3\u7801\u89e3\u6790<\/li>\n<li>\n<ul>\n<li>2.1.1 \u6a21\u578b\u52a0\u8f7d<\/li>\n<li>2.1.2 \u56fe\u50cf\u7ffb\u8f6c<\/li>\n<li>2.1.3 \u4eba\u8138\u68c0\u6d4b &#043; \u5fae\u7b11\u68c0\u6d4b<\/li>\n<\/ul>\n<\/li>\n<li>2.2 \u663e\u793a\u6548\u679c<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u53c2\u6570\u8c03\u4f18\u5efa\u8bae<\/li>\n<li>\u56db\u3001\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u5f15\u8a00<\/h3>\n<p>\u5728\u8ba1\u7b97\u673a\u89c6\u89c9\u9886\u57df&#xff0c;\u4eba\u8138\u68c0\u6d4b\u548c\u8868\u60c5\u8bc6\u522b\u4e00\u76f4\u662f\u70ed\u95e8\u7684\u7814\u7a76\u65b9\u5411\u3002\u4eca\u5929\u6211\u5c06\u5206\u4eab\u4e00\u4e2a\u4f7f\u7528Python\u548cOpenCV\u5b9e\u73b0\u7684\u5b9e\u65f6\u4eba\u8138\u5fae\u7b11\u68c0\u6d4b\u7cfb\u7edf\u3002\u8fd9\u4e2a\u7cfb\u7edf\u80fd\u591f\u901a\u8fc7\u6444\u50cf\u5934\u6355\u6349\u89c6\u9891\u6d41&#xff0c;\u5b9e\u65f6\u68c0\u6d4b\u4eba\u8138\u5e76\u8bc6\u522b\u5fae\u7b11\u8868\u60c5&#xff0c;\u975e\u5e38\u9002\u5408\u521d\u5b66\u8005\u5b66\u4e60\u8ba1\u7b97\u673a\u89c6\u89c9\u7684\u57fa\u7840\u5e94\u7528\u3002<\/p>\n<h3>\u4e00\u3001\u6280\u672f\u539f\u7406<\/h3>\n<p>\u672c\u5b9e\u73b0\u4e3b\u8981\u57fa\u4e8eOpenCV\u63d0\u4f9b\u7684Haar\u7ea7\u8054\u5206\u7c7b\u5668&#xff0c;\u4f7f\u7528\u4e86\u4e24\u4e2a\u9884\u8bad\u7ec3\u6a21\u578b&#xff1a;<\/p>\n<li>haarcascade_frontalface_default.xml &#8211; \u7528\u4e8e\u4eba\u8138\u68c0\u6d4b<\/li>\n<li>haarcascade_smile.xml &#8211; \u7528\u4e8e\u5fae\u7b11\u68c0\u6d4b<\/li>\n<p>Haar\u7ea7\u8054\u5206\u7c7b\u5668\u662f\u4e00\u79cd\u57fa\u4e8e\u673a\u5668\u5b66\u4e60\u7684\u7269\u4f53\u68c0\u6d4b\u65b9\u6cd5&#xff0c;\u7531Paul Viola\u548cMichael Jones\u57282001\u5e74\u63d0\u51fa\u3002\u5b83\u901a\u8fc7\u8bad\u7ec3\u5927\u91cf\u6b63\u8d1f\u6837\u672c&#xff0c;\u5b66\u4e60\u7269\u4f53\u7684\u7279\u5f81\u6a21\u5f0f&#xff0c;\u4ece\u800c\u5b9e\u73b0\u5feb\u901f\u68c0\u6d4b\u3002<\/p>\n<h3>\u4e8c\u3001\u4ee3\u7801\u5b9e\u73b0<\/h3>\n<p><span class=\"token keyword\">import<\/span> cv2<\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u9884\u8bad\u7ec3\u6a21\u578b<\/span><br \/>\nfaceCascade <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>CascadeClassifier<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;haarcascade_frontalface_default.xml&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nsmile <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>CascadeClassifier<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;haarcascade_smile.xml&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\ncap <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>VideoCapture<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;smile.mp4&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">#\u521d\u59cb\u5316\u6444\u50cf\u5934<\/span><\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">:<\/span>     <span class=\"token comment\">#\u5904\u7406\u6bcf\u4e00\u5e27<\/span><br \/>\n    ret<span class=\"token punctuation\">,<\/span>image <span class=\"token operator\">&#061;<\/span> cap<span class=\"token punctuation\">.<\/span>read<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token comment\">#\u8bfb\u53d6\u4e00\u5e27<\/span><br \/>\n    image <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>flip<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>    <span class=\"token comment\">#\u56fe\u7247\u7ffb\u8f6c&#xff0c;\u6c34\u5e73\u7ffb\u8f6c&#xff08;\u955c\u50cf&#xff09;<\/span><\/p>\n<p>    <span class=\"token comment\"># \u6ca1\u6709\u8bfb\u5230&#xff0c;\u76f4\u63a5\u9000\u51fa<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> ret <span class=\"token keyword\">is<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><\/p>\n<p>    <span class=\"token comment\"># \u8f6c\u6362\u4e3a\u7070\u5ea6\u56fe\u50cf<\/span><br \/>\n    gray <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>cvtColor<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span>cv2<span class=\"token punctuation\">.<\/span>COLOR_BGR2GRAY<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># \u4eba\u8138\u68c0\u6d4b<\/span><br \/>\n    faces <span class=\"token operator\">&#061;<\/span> faceCascade<span class=\"token punctuation\">.<\/span>detectMultiScale<span class=\"token punctuation\">(<\/span>gray<span class=\"token punctuation\">,<\/span><br \/>\n                                         scaleFactor<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1.1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                         minNeighbors<span class=\"token operator\">&#061;<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                         minSize<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># \u5904\u7406\u6bcf\u4e2a\u4eba\u8138<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">,<\/span>w<span class=\"token punctuation\">,<\/span>h<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> faces<span class=\"token punctuation\">:<\/span><br \/>\n        cv2<span class=\"token punctuation\">.<\/span>rectangle<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>x <span class=\"token operator\">&#043;<\/span> w<span class=\"token punctuation\">,<\/span>y <span class=\"token operator\">&#043;<\/span> h<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u63d0\u53d6\u4eba\u8138ROI\u533a\u57df(\u7070\u5ea6)<\/span><br \/>\n        roi_gray_face <span class=\"token operator\">&#061;<\/span> gray<span class=\"token punctuation\">[<\/span>y<span class=\"token punctuation\">:<\/span>y<span class=\"token operator\">&#043;<\/span>h<span class=\"token punctuation\">,<\/span>x<span class=\"token punctuation\">:<\/span>x<span class=\"token operator\">&#043;<\/span>w<span class=\"token punctuation\">]<\/span><br \/>\n        cv2<span class=\"token punctuation\">.<\/span>imshow<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Face ROI&#039;<\/span><span class=\"token punctuation\">,<\/span>roi_gray_face<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u5fae\u7b11\u68c0\u6d4b&#xff0c;\u4ec5\u5728\u4eba\u8138\u533a\u57df\u5185\u68c0\u6d4b<\/span><br \/>\n        smiles <span class=\"token operator\">&#061;<\/span> smile<span class=\"token punctuation\">.<\/span>detectMultiScale<span class=\"token punctuation\">(<\/span>roi_gray_face<span class=\"token punctuation\">,<\/span><br \/>\n                                        scaleFactor<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1.5<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                        minNeighbors<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                        minSize<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">50<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">50<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>sx<span class=\"token punctuation\">,<\/span>sy<span class=\"token punctuation\">,<\/span>sw<span class=\"token punctuation\">,<\/span>sh<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> smiles<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token comment\"># \u7ed8\u5236\u5fae\u7b11\u533a\u57df<\/span><br \/>\n            a <span class=\"token operator\">&#061;<\/span> x <span class=\"token operator\">&#043;<\/span> sx<br \/>\n            b <span class=\"token operator\">&#061;<\/span> y <span class=\"token operator\">&#043;<\/span> sy<br \/>\n            cv2<span class=\"token punctuation\">.<\/span>rectangle<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span>b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token operator\">&#043;<\/span>sw<span class=\"token punctuation\">,<\/span>b<span class=\"token operator\">&#043;<\/span>sh<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token comment\"># \u663e\u793a&#034;smile&#034;\u6587\u5b57<\/span><br \/>\n            cv2<span class=\"token punctuation\">.<\/span>putText<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;smile&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>cv2<span class=\"token punctuation\">.<\/span>FONT_HERSHEY_COMPLEX_SMALL<span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                        <span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>thickness<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># \u663e\u793a\u7ed3\u679c<\/span><br \/>\n    cv2<span class=\"token punctuation\">.<\/span>imshow<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Smile Detection&#034;<\/span><span class=\"token punctuation\">,<\/span>image<span class=\"token punctuation\">)<\/span><br \/>\n    key <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>waitKey<span class=\"token punctuation\">(<\/span><span class=\"token number\">25<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> key <span class=\"token operator\">&#061;&#061;<\/span><span class=\"token number\">27<\/span><span class=\"token punctuation\">:<\/span>  <span class=\"token comment\"># ESC\u952e\u9000\u51fa<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><\/p>\n<p><span class=\"token comment\"># \u91ca\u653e\u8d44\u6e90<\/span><br \/>\ncap<span class=\"token punctuation\">.<\/span>release<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ncv2<span class=\"token punctuation\">.<\/span>destroyAllWindows<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>2.1 \u5173\u952e\u4ee3\u7801\u89e3\u6790<\/h4>\n<h5>2.1.1 \u6a21\u578b\u52a0\u8f7d<\/h5>\n<p>faceCascade <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>CascadeClassifier<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;haarcascade_frontalface_default.xml&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nsmile <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>CascadeClassifier<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;haarcascade_smile.xml&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u8fd9\u4e24\u884c\u4ee3\u7801\u52a0\u8f7d\u4e86OpenCV\u63d0\u4f9b\u7684\u9884\u8bad\u7ec3Haar\u7ea7\u8054\u5206\u7c7b\u5668\u6a21\u578b\u3002<\/p>\n<hr \/>\n<h5>2.1.2 \u56fe\u50cf\u7ffb\u8f6c<\/h5>\n<p>image <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>flip<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<li>\n<p>cv2.flip()\u51fd\u6570<\/p>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u7ffb\u8f6c\u8f93\u5165\u56fe\u50cf&#xff08;\u6c34\u5e73\u3001\u5782\u76f4\u6216\u540c\u65f6\u7ffb\u8f6c&#xff09;\u3002<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>\u7b2c1\u4e2a\u53c2\u6570 image&#xff1a;\u8f93\u5165\u7684\u56fe\u50cf&#xff08;NumPy\u6570\u7ec4&#xff09;\u3002<\/li>\n<li>\u7b2c2\u4e2a\u53c2\u6570 1&#xff1a;\u7ffb\u8f6c\u6a21\u5f0f\u7684\u6807\u5fd7\u3002\n<ul>\n<li>0&#xff1a;\u5782\u76f4\u7ffb\u8f6c&#xff08;\u6cbfx\u8f74\u7ffb\u8f6c&#xff09;\u3002<\/li>\n<li>1&#xff1a;\u6c34\u5e73\u7ffb\u8f6c&#xff08;\u6cbfy\u8f74\u7ffb\u8f6c&#xff0c;\u5373\u955c\u50cf\u6548\u679c&#xff09;\u3002<\/li>\n<li>-1&#xff1a;\u540c\u65f6\u6c34\u5e73\u548c\u5782\u76f4\u7ffb\u8f6c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>flipCode&#061;1 \u7684\u6548\u679c \u5047\u8bbe\u539f\u56fe\u4e3a&#xff1a;<\/p>\n<\/li>\n<p>\u539f\u56fe&#xff1a;    <span class=\"token punctuation\">[<\/span>A B C<span class=\"token punctuation\">]<\/span>   \u2192 \u7ffb\u8f6c\u540e&#xff1a; <span class=\"token punctuation\">[<\/span>C B A<span class=\"token punctuation\">]<\/span><br \/>\n           <span class=\"token punctuation\">[<\/span>D E F<span class=\"token punctuation\">]<\/span>             <span class=\"token punctuation\">[<\/span>F E D<span class=\"token punctuation\">]<\/span><\/p>\n<ul>\n<li>\u6bcf\u4e00\u884c\u7684\u5143\u7d20\u987a\u5e8f\u88ab\u53cd\u8f6c&#xff0c;\u4f46\u884c\u7684\u987a\u5e8f\u4e0d\u53d8\u3002<\/li>\n<\/ul>\n<hr \/>\n<h5>2.1.3 \u4eba\u8138\u68c0\u6d4b &#043; \u5fae\u7b11\u68c0\u6d4b<\/h5>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">,<\/span>w<span class=\"token punctuation\">,<\/span>h<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> faces<span class=\"token punctuation\">:<\/span><br \/>\n        cv2<span class=\"token punctuation\">.<\/span>rectangle<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>x <span class=\"token operator\">&#043;<\/span> w<span class=\"token punctuation\">,<\/span>y <span class=\"token operator\">&#043;<\/span> h<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token comment\"># \u63d0\u53d6\u4eba\u8138\u6240\u5728\u533a\u57df&#xff0c;\u591a\u901a\u9053\u5f62\u5f0f<\/span><br \/>\n        <span class=\"token comment\"># roiColorFace &#061; image(y:y&#043;h,x:x&#043;w)<\/span><br \/>\n        <span class=\"token comment\"># \u63d0\u53d6\u4eba\u8138\u6240\u5728\u533a\u57df&#xff0c;\u5355\u901a\u9053\u5f62\u5f0f<\/span><br \/>\n        roi_gray_face <span class=\"token operator\">&#061;<\/span> gray<span class=\"token punctuation\">[<\/span>y<span class=\"token punctuation\">:<\/span>y<span class=\"token operator\">&#043;<\/span>h<span class=\"token punctuation\">,<\/span>x<span class=\"token punctuation\">:<\/span>x<span class=\"token operator\">&#043;<\/span>w<span class=\"token punctuation\">]<\/span><br \/>\n        cv2<span class=\"token punctuation\">.<\/span>imshow<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;lian&#039;<\/span><span class=\"token punctuation\">,<\/span>roi_gray_face<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token comment\"># \u5fae\u7b11\u68c0\u6d4b&#xff0c;\u4ec5\u5728\u4eba\u8138\u533a\u57df\u5185\u68c0\u6d4b<\/span><br \/>\n        smiles <span class=\"token operator\">&#061;<\/span> smile<span class=\"token punctuation\">.<\/span>detectMultiScale<span class=\"token punctuation\">(<\/span>roi_gray_face<span class=\"token punctuation\">,<\/span><br \/>\n                                        scaleFactor<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1.5<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                        minNeighbors<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                        minSize<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">50<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">50<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>sx<span class=\"token punctuation\">,<\/span>sy<span class=\"token punctuation\">,<\/span>sw<span class=\"token punctuation\">,<\/span>sh<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> smiles<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token comment\"># \u7ed8\u5236\u5fae\u7b11\u533a\u57df<\/span><br \/>\n            a <span class=\"token operator\">&#061;<\/span> x <span class=\"token operator\">&#043;<\/span> sx<br \/>\n            b <span class=\"token operator\">&#061;<\/span> y <span class=\"token operator\">&#043;<\/span> sy<br \/>\n            cv2<span class=\"token punctuation\">.<\/span>rectangle<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span>b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token operator\">&#043;<\/span>sw<span class=\"token punctuation\">,<\/span>b<span class=\"token operator\">&#043;<\/span>sh<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token comment\"># \u663e\u793a\u6587\u5b57\u201csmile\u201d \u8868\u793a\u5fae\u7b11\u4e86<\/span><br \/>\n            cv2<span class=\"token punctuation\">.<\/span>putText<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;smile&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>cv2<span class=\"token punctuation\">.<\/span>FONT_HERSHEY_COMPLEX_SMALL<span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                        <span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>thickness<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u662f\u4e00\u4e2a \u4eba\u8138\u68c0\u6d4b &#043; \u5fae\u7b11\u68c0\u6d4b \u7684\u7a0b\u5e8f&#xff0c;\u4e3b\u8981\u4f7f\u7528\u4e86 OpenCV \u7684 Haar \u7ea7\u8054\u5206\u7c7b\u5668&#xff08;detectMultiScale&#xff09;\u6765\u68c0\u6d4b\u4eba\u8138\u548c\u5fae\u7b11\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u89e3\u6790&#xff1a;<\/p>\n<hr \/>\n<p>\u4ee3\u7801\u529f\u80fd\u6982\u8ff0<\/p>\n<li>\u68c0\u6d4b\u4eba\u8138&#xff08;\u5728 faces \u4e2d\u5b58\u50a8\u7684\u4eba\u8138\u77e9\u5f62\u6846&#xff09;\u3002<\/li>\n<li>\u63d0\u53d6\u4eba\u8138\u533a\u57df&#xff08;\u7070\u5ea6\u56fe roi_gray_face&#xff09;\u3002<\/li>\n<li>\u5728\u4eba\u8138\u533a\u57df\u5185\u68c0\u6d4b\u5fae\u7b11&#xff08;smiles&#xff09;\u3002<\/li>\n<li>\u7ed8\u5236\u4eba\u8138\u6846\u548c\u5fae\u7b11\u6846&#xff0c;\u5e76\u6807\u6ce8\u6587\u5b57\u201csmile\u201d\u3002<\/li>\n<hr \/>\n<p>\u4ee3\u7801\u9010\u884c\u89e3\u6790<\/p>\n<p>1. \u904d\u5386\u68c0\u6d4b\u5230\u7684\u4eba\u8138<\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">,<\/span> w<span class=\"token punctuation\">,<\/span> h<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> faces<span class=\"token punctuation\">:<\/span><\/p>\n<ul>\n<li>faces \u662f\u4e00\u4e2a\u5305\u542b\u4eba\u8138\u77e9\u5f62\u6846\u7684\u5217\u8868&#xff0c;\u6bcf\u4e2a\u6846\u7531 (x, y, w, h) \u8868\u793a&#xff1a;\n<ul>\n<li>(x, y)&#xff1a;\u4eba\u8138\u5de6\u4e0a\u89d2\u5750\u6807\u3002<\/li>\n<li>(w, h)&#xff1a;\u4eba\u8138\u7684\u5bbd\u5ea6\u548c\u9ad8\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>2. \u7ed8\u5236\u4eba\u8138\u77e9\u5f62\u6846<\/p>\n<p>cv2<span class=\"token punctuation\">.<\/span>rectangle<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>x <span class=\"token operator\">&#043;<\/span> w<span class=\"token punctuation\">,<\/span> y <span class=\"token operator\">&#043;<\/span> h<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u5728\u539f\u59cb\u56fe\u50cf image \u4e0a\u7ed8\u5236\u7eff\u8272\u77e9\u5f62\u6846&#xff08;RGB (0,255,0)&#xff09;&#xff0c;\u7ebf\u5bbd\u4e3a 2\u3002<\/li>\n<\/ul>\n<p>3. \u63d0\u53d6\u4eba\u8138\u533a\u57df&#xff08;\u7070\u5ea6\u56fe&#xff09;<\/p>\n<p>roi_gray_face <span class=\"token operator\">&#061;<\/span> gray<span class=\"token punctuation\">[<\/span>y<span class=\"token punctuation\">:<\/span>y<span class=\"token operator\">&#043;<\/span>h<span class=\"token punctuation\">,<\/span> x<span class=\"token punctuation\">:<\/span>x<span class=\"token operator\">&#043;<\/span>w<span class=\"token punctuation\">]<\/span><br \/>\ncv2<span class=\"token punctuation\">.<\/span>imshow<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;lian&#039;<\/span><span class=\"token punctuation\">,<\/span> roi_gray_face<span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>gray \u662f\u7070\u5ea6\u56fe\u50cf&#xff08;\u5355\u901a\u9053&#xff09;\u3002<\/li>\n<li>roi_gray_face \u662f\u4ece gray \u4e2d\u622a\u53d6\u7684\u4eba\u8138\u533a\u57df\u3002<\/li>\n<li>cv2.imshow(&#039;lian&#039;, roi_gray_face) \u663e\u793a\u4eba\u8138\u533a\u57df\u7684\u7070\u5ea6\u56fe&#xff08;\u7a97\u53e3\u540d &#039;lian&#039;&#xff09;\u3002<\/li>\n<\/ul>\n<p>4. \u5728\u4eba\u8138\u533a\u57df\u5185\u68c0\u6d4b\u5fae\u7b11<\/p>\n<p>smiles <span class=\"token operator\">&#061;<\/span> smile<span class=\"token punctuation\">.<\/span>detectMultiScale<span class=\"token punctuation\">(<\/span><br \/>\n    roi_gray_face<span class=\"token punctuation\">,<\/span><br \/>\n    scaleFactor<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1.5<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    minNeighbors<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    minSize<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">50<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>smile \u662f\u4e00\u4e2a\u8bad\u7ec3\u597d\u7684 Haar \u7ea7\u8054\u5206\u7c7b\u5668&#xff08;\u7528\u4e8e\u5fae\u7b11\u68c0\u6d4b&#xff09;\u3002<\/li>\n<li>\u53c2\u6570\u8bf4\u660e&#xff1a;\n<ul>\n<li>scaleFactor&#061;1.5&#xff1a;\u6bcf\u6b21\u56fe\u50cf\u7f29\u653e\u7684\u6bd4\u4f8b&#xff08;\u8d8a\u5927\u68c0\u6d4b\u8d8a\u5feb&#xff0c;\u4f46\u53ef\u80fd\u6f0f\u68c0&#xff09;\u3002<\/li>\n<li>minNeighbors&#061;2&#xff1a;\u5019\u9009\u6846\u81f3\u5c11\u9700\u8981\u591a\u5c11\u4e2a\u90bb\u8fd1\u68c0\u6d4b\u624d\u88ab\u786e\u8ba4&#xff08;\u8d8a\u5c0f\u8bef\u68c0\u8d8a\u591a&#xff09;\u3002<\/li>\n<li>minSize&#061;(50, 50)&#xff1a;\u5fae\u7b11\u533a\u57df\u7684\u6700\u5c0f\u5c3a\u5bf8&#xff08;\u5c0f\u4e8e\u8be5\u5c3a\u5bf8\u7684\u5ffd\u7565&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>5. \u904d\u5386\u68c0\u6d4b\u5230\u7684\u5fae\u7b11\u533a\u57df<\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>sx<span class=\"token punctuation\">,<\/span> sy<span class=\"token punctuation\">,<\/span> sw<span class=\"token punctuation\">,<\/span> sh<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> smiles<span class=\"token punctuation\">:<\/span><\/p>\n<ul>\n<li>smiles \u5305\u542b\u5fae\u7b11\u77e9\u5f62\u6846 (sx, sy, sw, sh)&#xff0c;\u5750\u6807\u662f\u76f8\u5bf9\u4e8e roi_gray_face&#xff08;\u4eba\u8138\u533a\u57df&#xff09;\u7684\u3002<\/li>\n<\/ul>\n<p>6. \u7ed8\u5236\u5fae\u7b11\u6846&#xff08;\u84dd\u8272&#xff09;<\/p>\n<p>a <span class=\"token operator\">&#061;<\/span> x <span class=\"token operator\">&#043;<\/span> sx  <span class=\"token comment\"># \u8f6c\u6362\u5230\u539f\u59cb\u56fe\u50cf\u7684\u5750\u6807<\/span><br \/>\nb <span class=\"token operator\">&#061;<\/span> y <span class=\"token operator\">&#043;<\/span> sy<br \/>\ncv2<span class=\"token punctuation\">.<\/span>rectangle<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>a <span class=\"token operator\">&#043;<\/span> sw<span class=\"token punctuation\">,<\/span> b <span class=\"token operator\">&#043;<\/span> sh<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>(a, b) \u662f\u5fae\u7b11\u6846\u5728\u539f\u59cb\u56fe\u50cf image \u4e2d\u7684\u5de6\u4e0a\u89d2\u5750\u6807\u3002<\/li>\n<li>\u7ed8\u5236\u84dd\u8272\u77e9\u5f62\u6846&#xff08;RGB (255,0,0)&#xff09;&#xff0c;\u7ebf\u5bbd 2\u3002<\/li>\n<\/ul>\n<p>7. \u6807\u6ce8\u6587\u5b57\u201csmile\u201d<\/p>\n<p>cv2<span class=\"token punctuation\">.<\/span>putText<span class=\"token punctuation\">(<\/span>image<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;smile&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> cv2<span class=\"token punctuation\">.<\/span>FONT_HERSHEY_COMPLEX_SMALL<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">255<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u5728\u4eba\u8138\u6846\u5de6\u4e0a\u89d2 (x, y) \u5904\u663e\u793a\u9ec4\u8272\u6587\u5b57\u201csmile\u201d&#xff1a;\n<ul>\n<li>\u5b57\u4f53&#xff1a;cv2.FONT_HERSHEY_COMPLEX_SMALL\u3002<\/li>\n<li>\u5b57\u53f7&#xff1a;1\u3002<\/li>\n<li>\u989c\u8272&#xff1a;(0, 255, 255)&#xff08;\u9ec4\u8272&#xff09;\u3002<\/li>\n<li>\u7ebf\u5bbd&#xff1a;2\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p>\u4ee3\u7801\u6267\u884c\u6d41\u7a0b<\/p>\n<li>\u8f93\u5165\u56fe\u50cf \u2192 \u68c0\u6d4b\u4eba\u8138 \u2192 \u7ed8\u5236\u7eff\u8272\u4eba\u8138\u6846\u3002<\/li>\n<li>\u63d0\u53d6\u4eba\u8138\u533a\u57df \u2192 \u68c0\u6d4b\u5fae\u7b11 \u2192 \u7ed8\u5236\u84dd\u8272\u5fae\u7b11\u6846\u3002<\/li>\n<li>\u6807\u6ce8\u201csmile\u201d\u6587\u5b57 \u2192 \u663e\u793a\u7ed3\u679c\u3002<\/li>\n<hr \/>\n<p>\u6ce8\u610f\u4e8b\u9879<\/p>\n<li>\u4f9d\u8d56 Haar \u7ea7\u8054\u5206\u7c7b\u5668&#xff1a;\n<ul>\n<li>faces \u548c smiles \u662f\u7531 cv2.CascadeClassifier \u68c0\u6d4b\u5f97\u5230\u7684\u3002<\/li>\n<li>\u901a\u5e38\u9700\u8981\u52a0\u8f7d\u9884\u8bad\u7ec3\u6a21\u578b&#xff1a;face_cascade <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>CascadeClassifier<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;haarcascade_frontalface_default.xml&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nsmile_cascade <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>CascadeClassifier<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;haarcascade_smile.xml&#039;<\/span><span class=\"token punctuation\">)<\/span>\n <\/li>\n<\/ul>\n<\/li>\n<li>\u53c2\u6570\u8c03\u4f18&#xff1a;\n<ul>\n<li>scaleFactor \u548c minNeighbors \u5f71\u54cd\u68c0\u6d4b\u7cbe\u5ea6\u548c\u901f\u5ea6&#xff0c;\u9700\u6839\u636e\u5b9e\u9645\u573a\u666f\u8c03\u6574\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5750\u6807\u8f6c\u6362&#xff1a;\n<ul>\n<li>\u5fae\u7b11\u68c0\u6d4b\u662f\u5728\u4eba\u8138\u533a\u57df (roi_gray_face) \u5185\u8fdb\u884c\u7684&#xff0c;\u7ed8\u5236\u65f6\u9700\u8981\u8f6c\u6362\u56de\u539f\u59cb\u56fe\u50cf\u5750\u6807\u3002<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h4>2.2 \u663e\u793a\u6548\u679c<\/h4>\n<p>    <span class=\"token comment\"># \u663e\u793a\u7ed3\u679c<\/span><br \/>\n    cv2<span class=\"token punctuation\">.<\/span>imshow<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;dect&#034;<\/span><span class=\"token punctuation\">,<\/span>image<span class=\"token punctuation\">)<\/span><br \/>\n    key <span class=\"token operator\">&#061;<\/span> cv2<span class=\"token punctuation\">.<\/span>waitKey<span class=\"token punctuation\">(<\/span><span class=\"token number\">25<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> key <span class=\"token operator\">&#061;&#061;<\/span><span class=\"token number\">27<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><br \/>\ncap<span class=\"token punctuation\">.<\/span>release<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ncv2<span class=\"token punctuation\">.<\/span>destroyAllWindows<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u663e\u793a\u6548\u679c\u5982\u4e0b&#xff0c;\u6211\u4eec\u63d2\u5165\u4e00\u6bb5\u89c6\u9891&#xff0c;\u5728\u89c6\u9891\u4e2d\u5bf9\u4eba\u7269\u8fdb\u884c\u5fae\u7b11\u68c0\u6d4b&#xff0c;\u5e76\u753b\u51fa\u68c0\u6d4b\u6846&#xff1a;<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250521023544-682d3c009adb9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u4e09\u3001\u53c2\u6570\u8c03\u4f18\u5efa\u8bae<\/h3>\n<li>\n<p>\u4eba\u8138\u68c0\u6d4b\u53c2\u6570&#xff1a;<\/p>\n<ul>\n<li>minNeighbors\u503c\u8d8a\u5927&#xff0c;\u68c0\u6d4b\u8d8a\u4e25\u683c&#xff0c;\u4f46\u53ef\u80fd\u6f0f\u68c0<\/li>\n<li>scaleFactor\u901a\u5e38\u57281.01-1.5\u4e4b\u95f4<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5fae\u7b11\u68c0\u6d4b\u53c2\u6570&#xff1a;<\/p>\n<ul>\n<li>\u7531\u4e8e\u5fae\u7b11\u533a\u57df\u76f8\u5bf9\u8f83\u5c0f&#xff0c;minSize\u4e0d\u5b9c\u8bbe\u7f6e\u8fc7\u5927<\/li>\n<li>minNeighbors\u53ef\u4ee5\u9002\u5f53\u8c03\u5c0f\u4ee5\u907f\u514d\u6f0f\u68c0<\/li>\n<\/ul>\n<\/li>\n<h3>\u56db\u3001\u603b\u7ed3<\/h3>\n<p>\u672c\u6587\u4ecb\u7ecd\u4e86\u4e00\u4e2a\u57fa\u4e8eOpenCV 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