The comparison between PCA and simplex methods for reflectance recovery
In this paper the modified simplex, classical principle component analysis (PCA) as well as pseudo inverse (PI) methods have been applied for the reconstruction of the spectrum of 1269 Munsell color chips and 140 colored samples of Digital ColorChecker DC from GretagMacbeth. The synthesized reflectance curves, achieved from different techniques, have been compared by using color difference values under different illuminants and the root mean square (RMS) errors between the synthesized and original reflectance values. The color difference values under D65 as well as under A and T184 light sources have been minimized by the simplex method. In order to minimize the spiky outputs of simplex, sixteen different bell shape curves are applied on the estimated reflectance values. The color coordinates under D65, A and TL84 are used to recover the reflectance curves by using PCA technique. So, three and nine basis functions have been used in this method of recovery. Results show the priority of classical principle component technique over the simplex method.
Reflectance Recovery Simplex Method Principle Component Analysis Pseudo Inverse
N. Salamati S. H. Amirshahi
Department of Textile Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran 15914
国际会议
杭州
英文
149-152
2007-07-12（万方平台首次上网日期，不代表论文的发表时间）