JOGL是在java环境下使用OpenGL的一种方式，这些代码来自Dr. Andrew Davison的Pro Java 6 3D Game Development一书，给出了在JOGL中使用OpenGL的两种编程框架。 Web Site for the book: http://fivedots.coe.psu.ac.th/~ad/jg2

DCT is one of the novel normalization techniques for illumination variation. The technique is in- corporated by truncated the low frequency DCT Coecients. In face image illumination, changes slowly compared to re ectance. As a result illuminat