HW8-視訊webcam之應用

#include
#include
#include

#define x1 0
#define y1 0
#define alpha 0.5


int main()
{
CvCapture *capture;
IplImage *frame;
IplImage *frame1;
IplImage *frame3;
IplImage *gray;
IplImage *cgray;
IplImage *pgray;
IplImage *background1;
IplImage *background2;
IplImage *difference1;
IplImage *difference2;
IplImage* logoImg = NULL;

capture=cvCreateCameraCapture(0);
cvNamedWindow("Webcam",1);
cvNamedWindow("Webcam1",1);
cvNamedWindow("Webcam2",1);
//cvNamedWindow("Webcam3",1);

CvVideoWriter *writer;
char AviFileName[]="Output.avi";
int AviForamt = -1;
int FPS = 25;
CvSize AviSize = cvSize(640,480);
int AviColor = 1;
writer=cvCreateVideoWriter(AviFileName,AviForamt,FPS,AviSize,AviColor);

frame1 = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 3);
frame3 = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 3);
gray = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 1);
cgray = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 1);
background1 = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 1);
background2 = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 1);
difference1 = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 1);
difference2 = cvCreateImage(cvSize(640,480), IPL_DEPTH_8U, 1);

logoImg=cvLoadImage("logo.jpg");

frame = cvQueryFrame(capture);
cvFlip( frame, 0, 1);
cvCvtColor(frame, background1, CV_BGR2GRAY);
background2=cvCloneImage(background1);
int i=0;
while(true)
{
frame = cvQueryFrame(capture);

cvFlip( frame, 0, 1);
cvCvtColor(frame, cgray, CV_BGR2GRAY);
cvAbsDiff(cgray, background1, difference1);
cvFlip( difference1, 0, 0);
cvThreshold(difference1,difference1,50,255,CV_THRESH_BINARY);

cvAbsDiff(cgray, background2, difference2);
cvFlip( difference2, 0, 0);
cvThreshold(difference2,difference2, 50,255,CV_THRESH_BINARY);
background2=cvCloneImage(cgray);

/*
for (int y=0; yheight; y++) {
uchar* ptr1=(uchar*) (logoImg->imageData +y*logoImg->widthStep);
uchar* ptr2=(uchar*) (frame->imageData +(y+y1)*frame->widthStep);
for (int x=0; xwidth; x++) {
ptr2[3*(x+x1)]=alpha*ptr1[3*(x+x1)] + (1-alpha)*ptr2[3*(x+x1)];
ptr2[3*(x+x1)+1]=alpha*ptr1[3*(x+x1)+1] + (1-alpha)*ptr2[3*(x+x1)+1];
ptr2[3*(x+x1)+2]=alpha*ptr1[3*(x+x1)+2] + (1-alpha)*ptr2[3*(x+x1)+2];
}
}

*/

//cvWriteFrame(writer,frame);

cvShowImage("Webcam",frame);
cvShowImage("Webcam1",difference1);
cvShowImage("Webcam2",difference2);


if(cvWaitKey(100)>0) break;
i++;
}

cvReleaseCapture(&capture);
// cvReleaseVideoWriter(&writer);
cvDestroyWindow("Webcam");
cvDestroyWindow("Webcam1");
//cvDestroyWindow("Webcam2");
//cvDestroyWindow("Webcam3");
}