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《Science of Surveying and Mapping》 2009-02
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A control algorithm for adaptive and rapid exposure

WANG Lei-bin, ZHANG Ai-wu, YE Ze-tian, HOU Ming-hui, QU Wen-qian(The Key Lab of Three-dimensional Information Acquirement and Application of Ministry of Education, Capital Normal University,Beijing100037, China)  
For high-speed and continuously accessing the high-quality image information in rapid movement, an automatic exposure control method based on aperture priority was proposed in this paper. The optimal size of aperture in current scenery brightness was determined from evaluation of initial image, and then the exposure time of this aperture in diverse scenery brightness was obtained. The relationship model between exposure time and scenery brightness was established at last. The optimum exposure can be obtained according to this relational model, and dynamic adjustment of the exposure time can be realized through tracking current scenery brightness. The practice shows that this method has advantages of real-time, fast, high imaging quality and accuracy.
【Fund】: 国家“十一五”863计划地球观测与导航技术领域项目“车载多传感器集成关键技术研究”(2006AA12Z324)
【CateGory Index】: TP274
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