This paper presents an adaptive method of objects and shadows detection in video streams. Models of background are firstly set up and adaptively updated in Hue Saturation Intensity (HSI) color space to detect motion r...This paper presents an adaptive method of objects and shadows detection in video streams. Models of background are firstly set up and adaptively updated in Hue Saturation Intensity (HSI) color space to detect motion regions. Then, detection errors are dealt with by motion continuity and velocity consistency. Finally, cast shadows are removed by the generic properties of luminance, chrominance and gradient density. Experimental results and their evaluation are presented to verify the effectiveness of this new method.展开更多
对国画样品反射参量和特性进行测量与分析,结合色度学相关理论提出了一种利用亮度信息匹配的国画图像重建方法。采用色调-饱和度-亮度(HSI)色空间对国画辐亮度与色度信息进行分离,利用Gaussian函数对不同照明角度下PR-715实测图像色块...对国画样品反射参量和特性进行测量与分析,结合色度学相关理论提出了一种利用亮度信息匹配的国画图像重建方法。采用色调-饱和度-亮度(HSI)色空间对国画辐亮度与色度信息进行分离,利用Gaussian函数对不同照明角度下PR-715实测图像色块亮度数值进行拟合,从而建立对应的空间亮度函数关系式。选择90°照明角实拍图像为参考色块,将该图像HSI色空间的色度信息与拟合空间亮度信息相结合,重建出任意照明角度下的国画色块图像,并与Canon EOS 400D单反相机实拍图片进行比较分析。结果表明,利用亮度信息匹配方法能够准确对国画色块图像进行重建,该方法具有较高可行性与可靠性,对绘画艺术品文化遗产数字化的重建与真实复制有重要的实际应用价值。展开更多
基金the National Natural Science Foundation of China (60472072)the Specialized Research Foundation for the Doctoral Program of Higher Education (20040699034)+1 种基金the Aeronautical Science Foundation of China (04I50370)the Natural Science Foundation of Shaan’xi Province (2004K05-G23).
文摘This paper presents an adaptive method of objects and shadows detection in video streams. Models of background are firstly set up and adaptively updated in Hue Saturation Intensity (HSI) color space to detect motion regions. Then, detection errors are dealt with by motion continuity and velocity consistency. Finally, cast shadows are removed by the generic properties of luminance, chrominance and gradient density. Experimental results and their evaluation are presented to verify the effectiveness of this new method.
文摘对国画样品反射参量和特性进行测量与分析,结合色度学相关理论提出了一种利用亮度信息匹配的国画图像重建方法。采用色调-饱和度-亮度(HSI)色空间对国画辐亮度与色度信息进行分离,利用Gaussian函数对不同照明角度下PR-715实测图像色块亮度数值进行拟合,从而建立对应的空间亮度函数关系式。选择90°照明角实拍图像为参考色块,将该图像HSI色空间的色度信息与拟合空间亮度信息相结合,重建出任意照明角度下的国画色块图像,并与Canon EOS 400D单反相机实拍图片进行比较分析。结果表明,利用亮度信息匹配方法能够准确对国画色块图像进行重建,该方法具有较高可行性与可靠性,对绘画艺术品文化遗产数字化的重建与真实复制有重要的实际应用价值。