@Override
public void beforeUpdate(MBFImage frame) {
FImage gimg = frame.flatten();
// bring to sigma = 1.0
gimg.processInplace(new FGaussianConvolve(1f));
for (int i = 0; i < 3; i++) {
final int t = (int) Math.pow(2, i);
final double sigma = Math.sqrt(t);
final float sf = t;
harris.setDetectionScale((float) sigma);
harris.setImageBlurred(true);
harris.findInterestPoints(gimg);
final float iscale = harris.getIntegrationScale();
final float samplesize = 4 * iscale + 1;
for (final InterestPointData ipd : harris.getInterestPoints((float) (1e-5))) {
ipd.x *= sf;
ipd.y *= sf;
frame.drawShape(new Circle(ipd, sf * samplesize), RGBColour.RED);
}
gimg.processInplace(new FGaussianConvolve((float) Math.sqrt((Math.pow(2, i + 1) - t))));
gimg = ResizeProcessor.halfSize(gimg);
}
}
