Sampling for feature detection in image analysis
AssigneeImagination Technologies Limited
InventorTimothy Smith
Life of this patent
Estimating the term…
Abstract
A computer-implemented method for generating a feature descriptor for a location in an image for use in performing descriptor matching in analysing the image, the method comprising determining a set of samples characterising a location in an image by sampling scale-space data representative of the image, the scale-space data comprising data representative of the image at a plurality of length scales; and generating a feature descriptor in dependence on the determined set of samples.
Claims20
A descriptor generation system for generating a feature descriptor for a location in an image for use in performing descriptor matching in analysing the image, the descriptor generation system being configured to:
- obtain scale-space data representative of the image, said scale-space data comprising a pre-filtered representation of the image at a plurality of length scales;
- the descriptor generation system having a feature descriptor generator configured to:
- determine a set of samples characterising a location in an image by sampling, using a sampling unit, the scale-space data representative of the image in accordance with a descriptor pattern of the feature descriptor, wherein the descriptor pattern is used to determine length scales at which the samples are to be sampled from the pre-filtered representation of the image;
- and
- generate the feature descriptor in dependence on the determined set of samples.
A computer-implemented method for generating a feature descriptor for a location in an image for use in performing descriptor matching in analysing the image, the method comprising:
- obtaining scale-space data representative of the image, said scale-space data comprising a pre-filtered representation of the image at a plurality of length scales;
- determining a set of samples characterising a location in an image by sampling the scale-space data representative of the image in accordance with a descriptor pattern of the feature descriptor, wherein the descriptor pattern is used to determine length scales at which the samples are to be sampled from the pre-filtered representation of the image;
- and
- generating the feature descriptor in dependence on the determined set of samples.
A non-transitory computer readable storage medium having stored thereon computer readable instructions that, when executed at a computer system, cause the computer system to:
- obtain scale-space data representative of the image, said scale-space data comprising a pre-filtered representation of the image at a plurality of length scales;
- determine a set of samples characterising a location in an image by sampling the scale-space data representative of the image in accordance with a descriptor pattern of a feature descriptor, wherein the descriptor pattern is used to determine length scales at which the samples are to be sampled from the pre-filtered representation of the image;
- and
- generate the feature descriptor in dependence on the determined set of samples.
Dependencies are inferred from the claim text.