Mat input_image; Mat output_mask; Mat output_image; void main() { VideoCapture cam(0); if (!cam.isOpened()) return; namedWindow("input image"); namedWindow("output mask"); namedWindow("output image"); //椭圆皮肤模型 Mat skinCrCbHist = Mat::zeros(Size(256, 256), CV_8UC1); ellipse(skinCrCbHist, Point(113, 155.6), Size(23.4, 15.2), 43.0, 0.0, 360.0, Scalar(255, 255, 255), -1); while (true) { cam >> input_image; if (input_image.empty()) return; Mat ycrcb_image; output_mask = Mat::zeros(input_image.size(), CV_8UC1); cvtColor(input_image, ycrcb_image, CV_BGR2YCrCb); //首先转换成到YCrCb空间 for (int i = 0; i < input_image.cols; i++) //利用椭圆皮肤模型进行皮肤检测 for (int j = 0; j < input_image.rows; j++){ Vec3b ycrcb = ycrcb_image.at<Vec3b>(j, i); if (skinCrCbHist.at<uchar>(ycrcb[1], ycrcb[2]) > 0) output_mask.at<uchar>(j, i) = 255; } input_image.copyTo(output_image, output_mask); cv::erode(output_mask, output_mask, cv::Mat()); cv::erode(output_mask, output_mask, cv::Mat()); cv::erode(output_mask, output_mask, cv::Mat()); cv::erode(output_mask, output_mask, cv::Mat()); cv::dilate(output_mask, output_mask, cv::Mat()); imshow("input image", input_image); imshow("output mask", output_mask); imshow("output image", output_image); output_image.setTo(0); if (27 == waitKey(30)) return; } return; }
第二种：
Mat input_image; Mat output_mask; Mat output_image; Mat mask; void main() { VideoCapture cam(0); if (!cam.isOpened()) return; ///椭圆皮肤模型 Mat skinCrCbHist = Mat::zeros(Size(256, 256), CV_8UC1); ellipse(skinCrCbHist, Point(113, 155.6), Size(23.4, 15.2), 43.0, 0.0, 360.0, Scalar(255, 255, 255), -1); Mat element = getStructuringElement(MORPH_RECT, Size(3, 3), Point(-1, -1)); while (true) { cam >> input_image; if (input_image.empty()) return; Mat ycrcb_image; output_mask = Mat::zeros(input_image.size(), CV_8UC1); cvtColor(input_image, ycrcb_image, CV_BGR2YCrCb); //首先转换成到YCrCb空间 for (int i = 0; i < input_image.rows; i++) //利用椭圆皮肤模型进行皮肤检测 { uchar* p = (uchar*)output_mask.ptr<uchar>(i); Vec3b* ycrcb = (Vec3b*)ycrcb_image.ptr<Vec3b>(i); for (int j = 0; j < input_image.cols; j++) { if (skinCrCbHist.at<uchar>(ycrcb[j][1], ycrcb[j][2]) > 0) p[j] = 255; } } morphologyEx(output_mask, output_mask, MORPH_CLOSE, element); vector< vector<Point> > contours; // 轮廓 vector< vector<Point> > filterContours; // 筛选后的轮廓 vector< Vec4i > hierarchy; // 轮廓的结构信息 contours.clear(); hierarchy.clear(); filterContours.clear(); findContours(output_mask, contours, hierarchy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE); // 去除伪轮廓 for (size_t i = 0; i < contours.size(); i++) { if (fabs(contourArea(Mat(contours[i]))) > 1500&&fabs(arcLength(Mat(contours[i]),true))<2000) //判断手进入区域的阈值 filterContours.push_back(contours[i]); } output_mask.setTo(0); drawContours(output_mask, filterContours, -1, Scalar(255, 0, 0), CV_FILLED); //8, hierarchy); input_image.copyTo(output_image, output_mask); imshow("input image", input_image); imshow("output image", output_image); output_image.setTo(0); if (27 == waitKey(30)) return; } return; }