/**
* Check a few simple motions. It seems to be accurate to within 1 pixel. Considering alphas seems
* to be the issue
*/
@Test
public void updateTrackLocation() {
ImageFloat32 a = new ImageFloat32(100, 100);
ImageFloat32 b = new ImageFloat32(100, 100);
// randomize input image and move it
GImageMiscOps.fillUniform(a, rand, 0, 200);
GImageMiscOps.fillUniform(b, rand, 0, 200);
shiftCopy(0, 0, a, b);
CirculantTracker<ImageFloat32> alg =
new CirculantTracker<ImageFloat32>(1f / 16, 0.2, 1e-2, 0.075, 1.0, 64, 255, interp);
alg.initialize(a, 5, 6, 20, 25);
alg.updateTrackLocation(b);
// only pixel level precision.
float tolerance = 1f;
// No motion motion
Rectangle2D_F32 r = alg.getTargetLocation();
assertEquals(5, r.x0, tolerance);
assertEquals(6, r.y0, tolerance);
// check estimated motion
GImageMiscOps.fillUniform(b, rand, 0, 200);
shiftCopy(-3, 2, a, b);
alg.updateTrackLocation(b);
r = alg.getTargetLocation();
assertEquals(5 - 3, r.x0, tolerance);
assertEquals(6 + 2, r.y0, tolerance);
// try out of bounds case
GImageMiscOps.fillUniform(b, rand, 0, 200);
shiftCopy(-6, 0, a, b);
alg.updateTrackLocation(b);
assertEquals(5 - 6, r.x0, tolerance);
assertEquals(6, r.y0, tolerance);
}
