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《Application of Electronic Technique》 2008-05
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The implementation of step-motor drive and auto-focus based on FPGA

ZHANG Wen Ai,LI Feng Lei,CHENG Yong Qiang (College of Information Engineering of TUT,Taiyuan 030024,China)  
A kind of step -motor drive and auto -focus is designed with Xilinx company′s Spartan – IIE series FPGA XC2S300E-6-PQ208C. The design receives the image signal from CCD sensor. The design utilizes an improved gray scale differen- tial algorithm as focus value. The sum of the gray scale differential absolute value of an image is used as the focus value. Accord- ing to the comparing result of two adjacent fields and utilizing some search strategy to control the remove of step-motor, the image can be auto-focused.
【CateGory Index】: TM383.6
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【Citations】
Chinese Journal Full-text Database 2 Hits
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
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8 YAN Jia-ming ,ZHANG Hong-tao(School of Electronic Information,Northwestern Polytechnical University, Xi'an 710072,China );Design of Air Pressure Altitude Measuring System in Pilotless Aircraft Based on FPGA[J];Chinese Journal of Sensors and Actuators;2007-03
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