Patent ID: 8897561
Filing Date: 2014-11-25
Classification: G06K

Abstract:
1. A method for detecting disappearance of a pattern, implemented in a displaying apparatus and used to detect whether a fixed-still pattern in dynamic displayed images on the displaying apparatus disappears, comprising: analyzing a pattern characteristic parameter which represents the fixed-still pattern from each of the images continuously displayed in a time sequence and checking whether the pattern characteristic parameter fast decreases from at least greater than a high level to at least less than a low level, as a first state transition; calculating a sum of absolute difference (SAD) values for all of the pixels at a same location of a previous image and a current image and checking whether the sum of the SAD values fast increases from at least less than the low level to at least greater than the high level, as a second state transition; and determining that the fixed-still pattern disappears in the display when the first state transition and the second state transition occur simultaneously.