Title :
New autofocusing technique using the frequency selective weighted median filter for video cameras
Author :
Kang-Sun Choi ; Sung-Jea Ko
Author_Institution :
Dept. of Electron. Eng., Korea Univ., Seoul, South Korea
Abstract :
A new autofocusing technique using the frequency selective weighted median (FSWM) filter is proposed for video cameras. The FSWM filter is resistive to impulsive noise from the CCD of the video cameras. Experimental results demonstrate that the proposed algorithm outperforms existing techniques by enhancing the accuracy of the focus value of the video camera.
Keywords :
band-pass filters; median filters; optical focusing; video cameras; video signal processing; CCD; FSWM filter; accuracy; autofocusing technique; focus value; frequency selective weighted median filter; impulsive noise; video cameras; Band pass filters; Cameras; Charge coupled devices; Charge-coupled image sensors; Focusing; Frequency; Image edge detection; Lenses; Noise generators; Nonlinear filters;
Conference_Titel :
Consumer Electronics, 1999. ICCE. International Conference on
Conference_Location :
Los Angeles, CA, USA
Print_ISBN :
0-7803-5123-1
DOI :
10.1109/ICCE.1999.785212
