Title :
Auto focus filter design and implementation using correlation between filter and auto focus criterion
Author :
Cheol-Hee Park ; Jong-Ho Paik ; Young-Hwan You ; Hyoung-Kyu Song ; Yong-Soo Cho
Author_Institution :
Syst. IC Res. Center, Korea Electron. Technol. Inst., South Korea
Abstract :
A new filter design method for an auto focus is proposed which can be implemented into a simple hardware. The proposed auto focus filter can be implemented without multipliers. Therefore, we can sharply reduce the number of filter coefficients by the proposed design method. The proposed filter design method is simulated and tested by our hardware system.
Keywords :
CCD image sensors; cameras; optical focusing; video cameras; video signal processing; auto focus criterion; auto focus filter design; correlation; filter coefficients; filter criterion; filter design method; implementation; Algorithm design and analysis; Charge coupled devices; Charge-coupled image sensors; Filters; Focusing; Fourier transforms; Frequency; Hardware; Information filtering; Lenses;
Conference_Titel :
Consumer Electronics, 2000. ICCE. 2000 Digest of Technical Papers. International Conference on
Conference_Location :
Los Angles, CA, USA
Print_ISBN :
0-7803-6301-9
DOI :
10.1109/ICCE.2000.854611
