检测生成.xml文件的效果：以人脸xml为例

来源：互联网发布：三年经验程序员薪资编辑：程序博客网时间：2024/05/24 03:22

人脸检测代码：    检测单张图片    检测视频中的人脸

#include "opencv2/objdetect/objdetect.hpp"#include "opencv2/highgui/highgui.hpp"#include "opencv2/imgproc/imgproc.hpp"#include <iostream>#include <stdio.h>using namespace std;using namespace cv;/************************************************************************///加载训练好的分类器String face_cascade_name = "cascade.xml";//String face_cascade_name = "haarcascade_frontalface_alt.xml";/************************************************************************/CascadeClassifier face_cascade;RNG rng(12345);void detectAndDisplay( Mat frame ) //检测单张图片frame{    std::vector<Rect> faces;    Mat frame_gray;    cvtColor( frame, frame_gray, CV_BGR2GRAY );    equalizeHist( frame_gray, frame_gray );    face_cascade.detectMultiScale( frame_gray, faces, 1.1, 2, 0|CV_HAAR_SCALE_IMAGE, Size(30, 30) );    for( size_t i = 0; i < faces.size(); i++ )    {        Point center( faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5 );        ellipse( frame, center, Size( faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0 );        Mat faceROI = frame_gray( faces[i] );        std::vector<Rect> eyes;    }    imshow( "测试结果图", frame );}void frame_show()  //测试单张图片{    Mat frame;    frame = imread("3.jpg");  ///被测的图片名称    detectAndDisplay(frame);    waitKey(0);}void cap_show()  //测试视频流{       CvCapture* capture;    Mat frame;    //-- 2. Read the video stream    capture = cvCaptureFromCAM( 0 );    if( capture )    {        while( true )        {            frame = cvQueryFrame( capture );            if( !frame.empty() )            { detectAndDisplay( frame ); }            else            { printf(" --(!) No captured frame -- Break!"); break; }            int c = waitKey(10);            if( (char)c == 'c' ) { break; }        }    }}/************************************************************************//************************************************************************/int main( int argc, const char** argv ){    if( !face_cascade.load( face_cascade_name ) ){ printf("--(!)Error loading\n"); return -1; };/*---------------------------------------------------*/      frame_show();  //测试单张图片    //cap_show();  //视频检测    return 0;}

1 0