基于OpenCV的简易特征提取代码

#include <iostream>

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/opencv.hpp>

using namespace std;

using namespace cv;

IplImage* doCanny(IplImage* image_input,

double lowThresh,

double highThresh,

double aperture)

{

if(image_input->nChannels != 1)

return (0);

IplImage* image_output = cvCreateImage(cvGetSize(image_input),

image_input->depth,

image_input->nChannels);

cvCanny(image_input,image_output,lowThresh,highThresh,aperture);

return(image_output);

}

int main(int argc, char* argv[])

{

cvNamedWindow("Camera" , CV_WINDOW_AUTOSIZE );

CvCapture* capture = cvCreateCameraCapture(CV_CAP_ANY);

assert(capture != NULL);

IplImage *frame = 0;

frame = cvQueryFrame(capture);

IplImage *frame_edge = cvCreateImage(cvGetSize(frame),

IPL_DEPTH_8U,

1);

while(1)

{

frame = cvQueryFrame(capture);

if(!frame) break;

cvConvertImage(frame,frame_edge,0);

frame = cvCloneImage(frame_edge);

frame_edge = doCanny(frame_edge,70,90,3);

cvShowImage("Camera",frame_edge);

char c = cvWaitKey(15);

if(c == 27)  break;

}

cvReleaseCapture(&capture);

cvReleaseImage( &frame_edge );

cvReleaseImage( &frame);

return (int)0;

}