我正在使用İ.MXQ6sabresd
开发板。我想gstreamer
与Opencv
. 我想用OpenCV
. 但是我的代码不起作用。
我该怎么做 ?
我的代码如下:
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdlib.h>
using namespace std;
using namespace cv;
String window_name = "Face Detection";
void detectFaces(Mat frame, int frameno) {
CascadeClassifier face_cascade;
face_cascade.load("/usr/examples/facevide/haarcascade_frontalface_alt.xml");
CascadeClassifier eye_cascade;
eye_cascade.load("/usr/examples/facevide/haarcascade_eye.xml");
std::vector<Rect> faces;
face_cascade.detectMultiScale( frame, faces, 1.1, 2, 0|CV_HAAR_SCALE_IMAGE,
Size(30, 30) );
std::vector<Rect> eyes;
eye_cascade.detectMultiScale( frame, eyes, 1.1, 2, 0 |CV_HAAR_SCALE_IMAGE,
Size(100, 100) );
std::ostringstream name;
name << "rotated_im_" << frameno << ".jpg";
for( int i = 0; i < faces.size(); i++ ){
Point center(faces[i].x + faces[i].width/2, faces[i].y + faces[i].height/2);
ellipse(frame, center, Size(faces[i].width/2, faces[i].height/2), 0, 0, 360, Scalar( 255, 0,
255 ), 4, 8, 0 );
for( int j = 0; j < eyes.size(); j++ )
{
Point eyes_center( eyes[j].x + eyes[j].width/2, eyes[j].y + eyes[j].height/2 );
int radius = cvRound( (eyes[j].width + eyes[j].height)*0.25 );
circle( frame, eyes_center, radius, Scalar( 255, 0, 0 ), 4, 8, 0 );
}
}
imwrite(name.str(), frame); // Display frame
}
int main() {
//VideoCapture cap("gst-launch-1.0 imxv4l2src ! autovideosink ! appsink");
//VideoCapture cap("gst-launch-1.0 autovideosrc ! autovideosink");
//VideoCapture cap(" mfw_v4lsrc ! ffmpegcolorspace ! video/x-raw-rgb ! appsink");
//VideoCapture cap("v4l2src ! video/x-raw, framerate=30/1, width=640, height=480, format=RGB ! videoconvert ! appsink");
VideoCapture cap("gst-launch mfw_v4lsrc num-buffers=1 ! jpegenc ! filesink location=sample.jpeg");
Mat frame;
int i = 0;
while(cap.read(frame)) {
detectFaces(frame, i);
i++;
}
}