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US 2014/0232893 A1Published application
Image sensor and operating method thereof
AssigneePixart Imaging Inc.
InventorsCHUAN-HSIN LEE, WEN-HAN YAO
Life of this patent
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Abstract
There is provided an image sensor including a light sensitive device and a digital signal processing circuit. The light sensitive device is configured to output a digital image. The digital signal processing circuit is configured to detect at least one feature point in the digital image and calculate a feature point coordinate of the at least one feature point.
Claims20
An image sensor, comprising:
- a light sensitive device configured to output a digital image;
- and
- a digital signal processing circuit comprising a feature detection circuit configured to detect at least one corner feature in the digital image and calculate a feature point coordinate of the at least one corner feature.
An image sensor, comprising:
- a light sensitive device configured to output a digital image;
- a memory unit;
- and
- a feature detection circuit, comprising:
- a corner detecting arithmetic logic configured to detect at least one corner coordinate in the digital image for being saved in the memory unit;
- a corner response arithmetic logic configured to calculate a corner response value corresponding to each the corner coordinate;
- and
- a non-maximum suppression arithmetic logic configured to remove the corner coordinate, within a predetermined pixel range, that does not have a maximum response value from the memory unit.
5 more elements
An operating method of an image sensor, comprising:
- capturing a digital image with a light sensitive device;
- and
- calculating and outputting, using a processing circuit, a feature point coordinate of at least one feature point in the digital image.
Dependencies are inferred from the claim text.