Back to results
US 6,151,415 AGranted
Auto-focusing algorithm using discrete wavelet transform
AssigneeIntel Corporation
InventorsTinku Acharya, Werner Metz
Life of this patent
Estimating the term…
Abstract
What is disclosed is a method that includes generating an overall sharpness parameter for a given focus position by performing a Discrete Wavelet Transform upon an image captured by an imaging device and automatically focusing said imaging device to an optimal focus position by comparing a plurality of different sharpness parameters. The optimal focusing position is automatically determined by finding the highest sharpness parameter for a given scene.
Claims20
A method comprising:
- generating a plurality of different overall sharpness parameters each corresponding to a different focus position by performing a Discrete Wavelet Transform upon a plurality of different images each corresponding to a different focus position captured by an imaging device;
- and
- automatically focusing said imaging device to an optimal focus position by comparing said plurality of different overall sharpness parameters.
An apparatus comprising:
- an image capture sensor;
- a DWT (Discrete Wavelet Transform) engine coupled to said image capture sensor, said DWT engine adapted to perform a DWT upon images captured by said sensor;
- and
- a focus control mechanism coupled to said image capture sensor and said DWT engine, said focus control mechanism adapted to automatically set an optimal focus position for said image capture sensor based on said DWT.
1 more element
An article comprising a computer readable medium having instructions stored thereon which when executed causes:
- generating an overall sharpness parameter for a given focus position by performing a Discrete Wavelet Transform upon an image captured by an imaging device;
- and
- automatically focusing said imaging device to an optimal focus position by comparing a plurality of different overall sharpness parameters.
Dependencies are inferred from the claim text.