LED光源的波段间隔选择在彩色视觉中的应用  

Wavelength Intervals Selection of LED Illumination for Color Vision Application

作　　者：祝振敏[1] 曲兴华[1] 梁海昱[1] 贾果欣[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《光谱学与光谱分析》2011年第4期1025-1029,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(50875185);天津市应用基础及前沿技术重点项目(09JCZDJC23600)资助

摘　　要：在彩色视觉的应用中,当检测目标背景拥有多种颜色时,检测目标总是难以从复杂的背景的中区分出来。选择合适的光源波段能够提高检测目标与背景的分辨力。该文首先利用四块具有不同反射率的标准板,将各表面的反射函数进行标定。然后应用偏最小二乘法选择合适的光源波段间隔。变量在投影方向的重要程度(VIP)得分作为波段间隔选择的挑选依据。VIP得分>1.0的波段视为有效的波段间隔。最终选取三个波段间隔作为视觉系统的光源照明,并进行了实验同时区分开实验图像的各表面并提高其分辨力。实验结果验证了该方法的有效性。In color vision application,for the images with multiple colors,object can not be clearly separated from complicated background.The discrimination of the surfaces can be enhanced by selecting appropriate wavelength intervals of illumination.Firstly,the reflectance functions of all the surfaces were calibrated by four standard references.Then partial least squares method was used for selecting the effective wavelength interval of illumination.The variables important in projection（VIP） scores of wavelength intervals were considered as selection criteria.Wavelength intervals with the VIP1.0 were selected for illumination.Finally,three effective wavelength intervals of LED illumination were selected to separate all the surfaces of experiment image simultaneously.For separating all the surfaces of experiment image simultaneously and improving discrimination,the experiment was carried out.The experiment results demonstrate the usefulness of this method.

关 键 词：彩色视觉 表面反射函数 偏最小二乘法 波段间隔 

分 类 号：O657.3[理学—分析化学]