Pt(5001, -400),
		Pt(-701, -801),
	}
	for _, r := range rects {
		for _, subsampleRatio := range subsampleRatios {
			for _, delta := range deltas {
				testYCbCr(t, r, subsampleRatio, delta)
			}
		}
		if testing.Short() {
			break
		}
	}
}

func testYCbCr(t *testing.T, r Rectangle, subsampleRatio YCbCrSubsampleRatio, delta Point) {
	// Create a YCbCr image m, whose bounds are r translated by (delta.X, delta.Y).