//--------------------------------------------------------------
void testApp::update(){
vidGrabber.grabFrame();
if(vidGrabber.isFrameNew()){
pastImg = grayImg;
cameraImg.setFromPixels(vidGrabber.getPixels(), cw, ch);
grayImg.setFromColorImage(cameraImg);
grayImg.threshold(100);
grayImg.blurHeavily();
/*
grayImg.dilate_3x3();
grayImg.threshold(230);
grayImg.blurHeavily();
*/
// printf("%p %p\n", pastImg.getCvImage(), grayImg.getCvImage());
cvCalcOpticalFlowBM(pastImg.getCvImage(), grayImg.getCvImage(),
block, shift, max_range, 0, velx, vely);
}
}
void ofCvOpticalFlowBM::calc( ofxCvGrayscaleImage & pastImage,
ofxCvGrayscaleImage & currentImage,
int size
)
{
cvCalcOpticalFlowBM(pastImage.getCvImage(), currentImage.getCvImage(),
block, shift, max_range, 0, vel_x, vel_y);
}
void ofxOpticalFlowBM :: update( unsigned char* pixels, int w, int h, int imageType ) {
if( w == scalSize.width && h == scalSize.height ) {
colrImgSml.setFromPixels( pixels, w, h );
greyImgSml.setFromColorImage( colrImgSml );
cvCalcOpticalFlowBM( greyImgPrv.getCvImage(), //Previous image (CvArr *)
greyImgSml.getCvImage(), //Current image (CvArr *)
blockSize, //Block size (CvSize)
shiftSize, //Shift size (CvSize)
maxRange, //Max range (CvSize)
0, //Use previous velocity as starting point if not zero (int)
opFlowVelX, //X Velocity (CvArr)
opFlowVelY //Y Velocity (CvArr)
);
greyImgPrv = greyImgSml;
}
}