CAJ | 학술논문

针对视频监视系统中的阴影检测问题,提出了一种基于灰度比值统计与边缘特征分析相融合的阴影检测方法.根据阴影的面积和灰度特征,采用灰度统计和正态分布曲线拟合的方法估计出阴影灰度的分布区域,实现对阴影的初分割.利用熵判据对初分割的结果进行判断,对于过分割的情况,依据目标与阴影间的位置关系,利用阴影的边缘特性进行目标重构.不同光照环境下的视频监控图像测试结果表明,该方法可以用于灰度图像和彩色图像,能够有效检测出阴影区域并保持目标的完整性.
침대시빈감시계통중적음영검측문제,제출료일충기우회도비치통계여변연특정분석상융합적음영검측방법.근거음영적면적화회도특정,채용회도통계화정태분포곡선의합적방법고계출음영회도적분포구역,실현대음영적초분할.이용적판거대초분할적결과진행판단,대우과분할적정황,의거목표여음영간적위치관계,이용음영적변연특성진행목표중구.불동광조배경하적시빈감공도상측시결과표명,해방법가이용우회도도상화채색도상,능구유효검측출음영구역병보지목표적완정성.
Focusing on the shadow detection problem in video surveillance system,a new method based on gray scale ratio statistics and edge feature analysis was proposed.According to the area and gray characteristics of shadow,shadow′s gray distribution was estimated by gray statistics and normal distribution curve fitting method,and then the initial segmentation result was obtained.For the over segmentation result judged by the entropy criterion,the moving targets could be reconstructed based on the shadow′s edge characteristics gotten from the position between shadow and target.Under different illumination environment the experimental results indicate that the proposed algorithm could be applied in both gray image and color image and it could detect the shadow region effectively and maintain the integrity of the targets.