Image processing method capable of detecting noise and related navigation device
AssigneePixart Imaging Inc.
InventorsChun-Wei Chen, Ren-Hau Gu
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Abstract
An image processing method capable of detecting noise includes adjusting a lighting unit to acquire an over-exposure image, comparing each pixel of the over-exposure image with at least one threshold value, labeling a pixel of the over-exposure image as the noise while bright intensity of the pixel is lower than the threshold value, calculating a simulating value according to bright intensity of pixels around the noise and except the noise, and utilizing the simulating value and bright intensity of other pixels except the noise to execute a displacement detecting calculation.
Claims15
An image processing method capable of detecting noise, comprising:
- adjusting a lighting unit to acquire an over-exposure image;
- comparing each pixel of the over-exposure image with at least one threshold value;
- labeling a pixel of the over-exposure image as the noise while bright intensity of the foresaid pixel is lower than the threshold value;
- calculating a simulating value according to bright intensity of pixels around the noise and except the noise;
- and
- utilizing the simulating value and bright intensity of other pixels except the noise to execute a displacement detecting calculation.
A navigation device with noise detection function, comprising:
- a lighting unit, having an adjustable shutter and/or an adjustable diaphragm;
- an image capturing unit;
- and
- a processing unit electrically connected to the lighting unit and the image capturing unit, the processing unit being adapted to adjust the adjustable shutter and/or the adjustable diaphragm to acquire an over-exposure image via the image capturing unit, to compare each pixel of the over-exposure image with at least one threshold value, and to label a pixel of the over-exposure image as noise while bright intensity of the foresaid pixel is lower than the threshold value, so as to calculate a simulating value according to bright intensity of pixels around the noise and except the noise, and to execute a displacement detecting calculation by utilization of the simulating value and bright intensity of other pixels except the noise.
Dependencies are inferred from the claim text.