ofVec2f ofxCvOpticalFlowLK::flowInRegion(float x, float y, float w, float h){
ofVec2f topLeft, bottomRight, total(0,0);
boundsForRect(x, y, w, h, &topLeft, &bottomRight);
for (int j = topLeft.y; j < bottomRight.y; j++) {
for(int i = topLeft.x; i < bottomRight.x; i++){
total += flowAtPoint(i, j);
}
}
return total;
}
ofVec2f ofxCvOpticalFlowLK::averageFlowInRegion(float x, float y, float w, float h)
{
ofVec2f topLeft, bottomRight, total(0,0);
boundsForRect(x, y, w, h, &topLeft, &bottomRight);
for (int j = topLeft.y; j < bottomRight.y; j += captureRowsStep) {
for(int i = topLeft.x; i < bottomRight.x; i += captureColsStep) {
total += flowAtPoint(i, j);
}
}
return total / ( (bottomRight.x - topLeft.x) * (bottomRight.y - topLeft.y));
}
ofPoint ofxCvOpticalFlowLK::flowInRegion(int x, int y, int w, int h){
w = fmin(x+w, x - captureWidth);
h = fmin(y+h, y - captureHeight);
x = fmax(0,x);
y = fmax(0,y);
ofPoint total(0,0);
for(int i = 0; i < x; i++){
for (int j = 0; j < y; j++) {
total += flowAtPoint(x, y);
}
}
return total / (w*h);
}
void ofxCvOpticalFlowLK::draw(int width, int height){
ofPushStyle();
// float scalex = (float) width / captureWidth;
// float scaley = (float) height / captureHeight;
int x, y, dx, dy;
for ( y = 0; y < captureHeight; y+=captureRowsStep ){
for ( x = 0; x < captureWidth; x+=captureColsStep ){
// dx = (int)cvGetReal2D( vel_x, y, x );
// dy = (int)cvGetReal2D( vel_y, y, x );
//
ofVec2f vec = flowAtPoint(x, y);
ofLine(x,y,(x+vec.x),(y+vec.y));
}
}
ofPopStyle();
}
