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20 January 2006 Design of video auto focusing based on image processing
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Proceedings Volume 6027, ICO20: Optical Information Processing; 602750 (2006)
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
In order to realize the auto focusing technique based on digital image processing, a video image processing system is designed by using high-performance digital signal processor TMS320VC5509 as the core, field programmable gate array FPGA for preprocessing of image. At the same time, it is proposed to use vector norm sum of image gray gradient as evaluation functions of digital image. It has the characteristics of good unbiasedness, powerful unimodality, etc., and can be applied to evaluation of defocusing. The hardware composition of the theory behind the auto focusing system, and the application of the evaluation function are discussed in details.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bo Meng, Ming Zhu, and Chang-jin Cai "Design of video auto focusing based on image processing", Proc. SPIE 6027, ICO20: Optical Information Processing, 602750 (20 January 2006);


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