Displacement detection apparatus and method
First Claim
Patent Images
1. A displacement detection apparatus, for being operated on a working surface, the displacement detection apparatus comprising:
- an image sensing unit capturing a reference frame and a current frame;
a storage unit configured to save at least one displacement threshold; and
a processing unit configured toselect a first block in the reference frame and a second block in the current frame, wherein the first block and the second block have a block size;
calculate a displacement according to the first block and the second block;
compare the displacement with the at least one displacement threshold to accordingly adjust the block size;
calculate a quality parameter of the current frame; and
determine a sub block size associated with the block size adjusted according to at least one of the quality parameter and an exposure parameter.
1 Assignment
0 Petitions
Accused Products
Abstract
A displacement detection method includes the steps of: capturing a first frame and a second frame; selecting a first block with a predetermined size in the first frame and selecting a second block with the predetermined size in the second frame; determining a displacement according to the first block and the second block; comparing the displacement with at least one threshold; and adjusting the predetermined size according to a comparison result of comparing the displacement and the threshold. The present invention further provides a displacement detection apparatus.
-
Citations
20 Claims
-
1. A displacement detection apparatus, for being operated on a working surface, the displacement detection apparatus comprising:
-
an image sensing unit capturing a reference frame and a current frame; a storage unit configured to save at least one displacement threshold; and a processing unit configured to select a first block in the reference frame and a second block in the current frame, wherein the first block and the second block have a block size; calculate a displacement according to the first block and the second block; compare the displacement with the at least one displacement threshold to accordingly adjust the block size; calculate a quality parameter of the current frame; and determine a sub block size associated with the block size adjusted according to at least one of the quality parameter and an exposure parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A displacement detection apparatus, for being operated on a working surface, the displacement detection apparatus comprising:
-
an image sensing unit capturing a reference frame and a current frame; a storage unit configured to save at least one displacement threshold; and a processing unit configured to select a first block in the reference frame and a second block in the current frame, wherein the first block and the second block have a block size; calculate a quality parameter of the current frame; adjust the block size according to at least one of the quality parameter and an exposure parameter; calculate a displacement according to the first block having the block size adjusted and the second block having the block size adjusted; and compare the displacement with the at least one displacement threshold to accordingly determine a sub block size associated with the block size adjusted. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification