Method of motion detection using adaptive threshold
AssigneeHimax Technologies Limited
InventorYing-Ru Chen
Life of this patent
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Abstract
A method of motion detection using an adaptive threshold, adaptive for determining whether a plurality of target pixels in a current scan line are moving pixels or not, is provided. First, a first threshold is given for determining whether the target pixels in the current scan line are moving pixels. Then, a number of moving pixels in a previous scan line of the current scan line is calculated and determined whether larger than a second threshold. If the number of moving pixels is larger than the second threshold, the first threshold is adjusted by a decrement, and then whether the target pixels in the current scan line are moving pixels is determined by using the adjusted first threshold.
Claims6
A method of motion detection using an adaptive threshold, adaptive for determining whether a plurality of target pixels are moving pixels or not, the method comprising:
- giving a first threshold for determining whether the target pixels in a current scan line are moving pixels, wherein the first threshold has an upper limit and a lower limit;
- calculating a number of moving pixels in a previous scan line of the current scan line;
- determining whether the number of moving pixels is larger than a second threshold;
- if the number of moving pixels is larger than the second threshold, adjusting the first threshold by a decrement;
- and
- determining whether the target pixels in the current scan line are moving pixels by using the adjusted first threshold,
- wherein after the step of giving the first threshold, the method further comprises:
- adjusting the first threshold by an increment when the motion detection of every L scan lines is completed, wherein L is a positive integer.
Dependencies are inferred from the claim text.