Realization of Auto-focusing Model in FPGA

Author

Guojin, Chen ; Miaofen, Zhu ; Yongning, Li ; Wanqiang, Wang

Author_Institution

Hangzhou Dianzi Univ., Hangzhou, China

Volume

2

fYear

2010

fDate

11-12 Nov. 2010

Firstpage

150

Lastpage

152

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Optoelectronics and Image Processing (ICOIP), 2010 International Conference on

Conference_Location

Haiko

Print_ISBN

978-1-4244-8683-0

Type

conf

DOI

10.1109/ICOIP.2010.163

Filename

5663248