Patent ID: 8515129
Filing Date: 2013-08-20
Classification: G06F

Abstract:
1. A displacement detection method, comprising: capturing a first frame and a second frame; selecting a first block in the first frame and a second block in the second frame, wherein the first and second blocks have a same size, the size of the first and second blocks is either a first size or a second size, and the second size is smaller than the first size; determining a displacement according to the first block and the second block; comparing the displacement with an upper threshold or a lower threshold, wherein the lower threshold is smaller than the upper threshold; for the size of the first and second blocks being the first size, adjusting the size of the first and second blocks to the second size when the displacement is larger than the upper threshold, and maintaining the size of the first and second blocks as the first size when the displacement is smaller than the upper threshold; and for the size of the first and second blocks being the second size, adjusting the size of the first and second blocks to the first size when the displacement is smaller than the lower threshold, and maintaining the size of the first and second blocks as the second size when the displacement is larger than the lower threshold.