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US 9,959,480 B1Granted
Pixel-structural reference image feature extraction
AssigneeAmazon Technologies, Inc.
InventorsAmit Kumar Agrawal, Qiang Liu, David Ting-Yu Wu
Life of this patent
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Abstract
Features are disclosed for classifying pixels included in a digital image. Distance information from a pixel to structural reference points, such as skeletal joints, is generated. The distance information is then applied to a pixel classifier to identify one or more classifications for the pixel.
Claims20
A system comprising:
- a computer-readable memory storing executable instructions;
- and
- one or more computer processors in communication with the computer-readable memory, wherein the one or more computer processors are configured to execute the executable instructions to at least:
- generate a normalized spatial distance between a structural reference of a subject in an image and a pixel in the image based at least in part on:
- (i) a spatial distance between the structural reference and the pixel,
- (ii) a first distance between a first pair of structural references of the subject, and
- (iii) a second distance between a second pair of structural references of the subject;
- and
- adjust a parameter included in a pixel classifier based at least in part on a category of content for the pixel, the normalized spatial distance, and the structural reference,
- wherein the pixel classifier, including the parameter as adjusted, receives the normalized spatial distance and the structural reference as input values and provides an output value indicating the category of content.
7 more elements
A computer-implemented method comprising:
- under control of one or more processors configured with specific computer-executable instructions,
- generating a normalized spatial distance between a structural reference of a subject in an image and a pixel in the image based at least in part on:
- (i) a spatial distance between the structural reference and the pixel, and
- (ii) a first distance between a first pair of structural references of the subject, and
- (iii) a second distance between a second pair of structural references of the subject;
- adjusting a parameter included in a pixel classifier based at least in part on a category of content for the pixel, the normalized spatial distance, and the structural reference;
- receiving, by the pixel classifier including the parameter as adjusted, the normalized spatial distance and the structural reference as input values;
- and
- providing, by the pixel classifier including the parameter as adjusted, an output value indicating the category of content.
6 more elements
Dependencies are inferred from the claim text.