Title :
Realization of Auto-focusing Model in FPGA
Author :
Guojin, Chen ; Miaofen, Zhu ; Yongning, Li ; Wanqiang, Wang
Author_Institution :
Hangzhou Dianzi Univ., Hangzhou, China
Abstract :
By the preprocessing method of the integration with the median filter and the linear transform of gray value, and the evaluation function based on power spectrum, an auto-focusing model is built. From the character of the image focusing algorithm based on power spectrum, the paper has designed the structural frame and algorithm flow of the image processing module, and proposed the pipelining structure, the `Ping-Pong´ operating mode, the double butterfly-shaped processor multiplex, the base 2 FFT transform. Those increase the speed of the computations and responses in image auto-focus.
Keywords :
fast Fourier transforms; field programmable gate arrays; image colour analysis; median filters; optical focusing; pipeline processing; FFT transform; FPGA; auto-focusing model; double butterfly-shaped processor multiplex; gray value; image auto-focus; image focusing; image processing module; linear transform; median filter; ping-pong operating mode; pipelining structure; power spectrum; Autofocusing; FPGA; Image processing; Power spectrum;
Conference_Titel :
Optoelectronics and Image Processing (ICOIP), 2010 International Conference on
Conference_Location :
Haiko
Print_ISBN :
978-1-4244-8683-0
DOI :
10.1109/ICOIP.2010.163
