Auto-focusing algorithm using discrete wavelet transform

Details Auto-focusing algorithm using discrete wavelet transform Auto-focusing algorithm using discrete wavelet transform

1998-12-14

2000-11-21

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Focus measuring or adjusting

348345, H04N 5232

Patent

active

061514152

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.

REFERENCES:
patent: 5200828 (1993-04-01), Jang et al.
patent: 5512951 (1996-04-01), Torii
patent: 5885841 (1999-03-01), Higgs, Jr. et al.
International Search Report, PCT/US99/26664, mailed Feb. 7, 00, 4 pages.

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