Paper Title:

Design of a Video Processor Based on FPGA

Periodical Advanced Materials Research (Volume 429)
Main Theme Manufacturing Systems Engineering
Edited by Gary Yang
Pages 190-194
DOI 10.4028/www.scientific.net/AMR.429.190
Citation Qi Gui Zhang et al., 2012, Advanced Materials Research, 429, 190
Online since January, 2012
Authors Qi Gui Zhang, Bo Zhang, Gang Zhang
Keywords Auto-Focusing, DDR2 SDRAM, FPGA, Frame Up-Scaling, Video Processor
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Abstract

The design of a kind of video processor with the function of auto-focusing is introduced in this paper. The video processor receives digital 8-bit YCbCr video signal. With a piece of DDR2 SDRAM as frame buffer, the video processor realizes the function of format conversion, frame up-scaling and color space conversion. The paper proposes an improved gray scale differential auto-focus algorithm and calculates the focus value of the current image real-timely. Applying the mountain climbing searching strategy to control the moving of the focus motor, and realize the function of auto-focusing. The whole design is realized in VHDL and verified with Xilinx XUPV5-LX110T FPGA developing board.