使用Dlib库进行68个人脸特征点检测
来源:互联网 发布:张韶涵范玮琪谁对知乎 编辑:程序博客网 时间:2024/05/04 10:34
dlib人脸检测共可检测出68个检测点
官网上的例子:http://dlib.net/face_landmark_detection_ex.cpp.html
进行适当的改写。
其中:D:\OpenCV\shape_predictor_68_face_landmarks.dat
是从 http://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2 下载的
#include <dlib/image_processing/frontal_face_detector.h>#include <dlib/image_processing/render_face_detections.h>#include <dlib/image_processing.h>#include <dlib/gui_widgets.h>#include <dlib/image_io.h>#include <iostream>using namespace dlib;using namespace std;int main(int argc, char** argv){ try { // This example takes in a shape model file and then a list of images to // process. We will take these filenames in as command line arguments. // Dlib comes with example images in the examples/faces folder so give // those as arguments to this program. // 这个例子需要一个形状模型文件和一系列的图片.// if (argc == 1)// {// cout << "Call this program like this:" << endl;// cout << "./face_landmark_detection_ex shape_predictor_68_face_landmarks.dat faces/*.jpg" << endl;// cout << "\nYou can get the shape_predictor_68_face_landmarks.dat file from:\n";// cout << "http://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2" << endl;//从这个地址下载模型标记点数据// return 0;// } // We need a face detector. We will use this to get bounding boxes for // each face in an image. //****需要一个人脸检测器,获得一个边界框 frontal_face_detector detector = get_frontal_face_detector(); // And we also need a shape_predictor. This is the tool that will predict face // landmark positions given an image and face bounding box. Here we are just // loading the model from the shape_predictor_68_face_landmarks.dat file you gave // as a command line argument. //****也需要一个形状预测器,这是一个工具用来预测给定的图片和脸边界框的标记点的位置。 //****这里我们仅仅从shape_predictor_68_face_landmarks.dat文件加载模型 shape_predictor sp;//定义个shape_predictor类的实例 deserialize("D:\\OpenCV\\shape_predictor_68_face_landmarks.dat") >> sp; image_window win, win_faces; // Loop over all the images provided on the command line. // ****循环所有图片// for (int i = 2; i < argc; ++i) {// cout << "processing image " << argv[i] << endl; array2d<rgb_pixel> img;//注意变量类型 rgb_pixel 三通道彩色图像 load_image(img, "D:\\img.jpg"); // Make the image larger so we can detect small faces. pyramid_up(img); // Now tell the face detector to give us a list of bounding boxes // around all the faces in the image. std::vector<rectangle> dets = detector(img);//检测人脸,获得边界框 cout << "Number of faces detected: " << dets.size() << endl;//检测到人脸的数量 // Now we will go ask the shape_predictor to tell us the pose of // each face we detected. //****调用shape_predictor类函数,返回每张人脸的姿势 std::vector<full_object_detection> shapes;//注意形状变量的类型,full_object_detection for (unsigned long j = 0; j < dets.size(); ++j) { full_object_detection shape = sp(img, dets[j]);//预测姿势,注意输入是两个,一个是图片,另一个是从该图片检测到的边界框 cout << "number of parts: " << shape.num_parts() << endl; //cout << "pixel position of first part: " << shape.part(0) << endl;//获得第一个点的坐标,注意第一个点是从0开始的 //cout << "pixel position of second part: " << shape.part(1) << endl;//获得第二个点的坐标 //打印出全部68个点 for (int i = 0; i < 68; i++) { cout << "第 " << i+1 << " 个点的坐标: " << shape.part(i) << endl; } // You get the idea, you can get all the face part locations if // you want them. Here we just store them in shapes so we can // put them on the screen. shapes.push_back(shape); } // Now let's view our face poses on the screen. //**** 显示结果 win.clear_overlay(); win.set_image(img); win.add_overlay(render_face_detections(shapes)); // We can also extract copies of each face that are cropped, rotated upright, // and scaled to a standard size as shown here: //****我们也能提取每张剪裁后的人脸的副本,旋转和缩放到一个标准尺寸 dlib::array<array2d<rgb_pixel> > face_chips; extract_image_chips(img, get_face_chip_details(shapes), face_chips); win_faces.set_image(tile_images(face_chips)); cout << "Hit enter to process the next image..." << endl; cin.get(); } } catch (exception& e) { cout << "\nexception thrown!" << endl; cout << e.what() << endl; }}
效果如下:
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