CAJ | 학술논문

为了抑制运动人体检测与跟踪中运动人体阴影的影响,提出了一种基于光照模型和图像纹理特征的阴影检测算法.首先依据光照模型理论,将互相关函数引入算法,并根据背景图像和当前图像对应像素点的互相关函数值判断其是否为阴影点.在此基础上,依据图像的纹理特征,将交叉熵函数引入算法,对互相关函数判断为非阴影点的像素,进行二次判断.该算法利用泰勒级数将交叉熵函数中的对数和除法运算转化为乘法运算,简化了运算过程.通过白天和晚上两种条件下的实验,验证了算法的准确性和有效性.
위료억제운동인체검측여근종중운동인체음영적영향,제출료일충기우광조모형화도상문리특정적음영검측산법.수선의거광조모형이론,장호상관함수인입산법,병근거배경도상화당전도상대응상소점적호상관함수치판단기시부위음영점.재차기출상,의거도상적문리특정,장교차적함수인입산법,대호상관함수판단위비음영점적상소,진행이차판단.해산법이용태륵급수장교차적함수중적대수화제법운산전화위승법운산,간화료운산과정.통과백천화만상량충조건하적실험,험증료산법적준학성화유효성.
To suppress the impact of the shadow of the moving body in detecting and tracking moving targets, a shadow detection algorithm based on illumination model and image texture characteristic is presented. Firstly, the cross-correlation function (CCF) based on illumination model is involved, and whether a pixel is a shadow point is determined by its value of the CCF. Then, the cross-entropy function (CEF) based on image texture characteristic is proposed. CEF is used to evaluate a non-shadow pixel judged by CCF. According to the Taylor series, logarithm and division in CEF are transformed into multiplication. Finally, by making experiments under day and night conditions, the validity and efficiency of the presented algorithm is demonstrated.