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《Acta Photonica Sinica》 2003-12
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Autofocus System Experiment Study Using Variational Image-sampling

Li Qi,Feng Huajun,Xu Zhihai State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China  
Variational sampling method was introduced into auto-focus and was made a window selection strategy. The sampling model keeps higher resolution in image center part and wider view filed, so can avoid incorrect focus result because of main imaging object′s escaping from image center field. Experiment study was made and some conclusions were acquired. New method reduced data involved in operation computing focus measure and quickened focus speed.
【CateGory Index】: TP274.2
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