Fast subspace projection of descriptor patches for image recognition
AssigneeQUALCOMM Incorporated
InventorsOnur C. Hamsici, Yuriy Reznik, John Hong, Sundeep Vaddadi, Chong U. Lee
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Abstract
A method for generating a feature descriptor is provided. A set of pre-generated sparse projection vectors is obtained. A scale space for an image is also obtained, where the scale space having a plurality scale levels. A descriptor for a keypoint in the scale space is then generated based on a combination of the sparse projection vectors and sparsely sampled pixel information for a plurality of pixels across the plurality of scale levels.
Claims61
A method for generating a feature descriptor, comprising:
- obtaining a set of pre-generated sparse projection vectors over a first plurality of scale levels;
- obtaining a scale space for an image, the scale space having a second plurality scale levels;
- and
- generating a descriptor for a keypoint in the scale space based on a combination of the sparse projection vectors and sparsely sampled pixel information for a plurality of pixels across the second plurality of scale levels.
A device, comprising:
- a storage device for storing a set of pre-generated sparse projection vectors over a first plurality of scale levels;
- and
- a processing circuit coupled to the storage device, the processing circuit adapted to:
- obtain a scale space for an image, the scale space having a second plurality scale levels;
- and
- generate a descriptor for a keypoint in the scale space based on a combination of the sparse projection vectors and sparsely sampled pixel information for a plurality of pixels across the second plurality of scale levels.
A device, comprising:
- means for obtaining a set of pre-generated sparse projection vectors over a first plurality of scale levels;
- means for obtaining a scale space for an image, the scale space having a second plurality scale levels;
- and
- means for generating a descriptor for a keypoint in the scale space based on a combination of the sparse projection vectors and sparsely sampled pixel information for a plurality of pixels across the second plurality of scale levels.
A non-transitory processor-readable storage medium comprising one or more instructions operational on a device, which when executed by a processing circuit, causes the processing circuit to:
- obtain a set of pre-generated sparse projection vectors over a first plurality of scale spaces;
- obtain a scale space for an image, the scale space having a second plurality scale levels;
- and
- generate a descriptor for a keypoint in the scale space based on a combination of the sparse projection vectors and sparsely sampled pixel information for a plurality of pixels across the second plurality of scale levels.
Dependencies are inferred from the claim text.