pratt

说明：  计算机图形学ppt， 介绍计算机图形学基础(Computer graphics ppt, introduced the basis of computer graphics)

三维时域有限差分法结合UPML吸收边界条件模拟程序(Three-dimensional finite-difference time-domain method combined with UPML absorbing boundary conditions)

好用地 matlab版本地 用hough变换进行直线提取地程序，提取最长地直线，以后会改进，可以提取累计矩阵中，局部峰值点地直线！(good land use Matlab version hough transform line extraction procedures. to extract the longest line, it will improve, can extract accumulated matrix, partial to the peak point straight!)

采用半隐式方案实现变分水平集图像分割方法(Active contour without edge, image segmentation)

实现了geodesic active contour图像分割算法，用到AOS scheme and level set method(Realize the geodesic active contour image segmentation algorithm, using AOS scheme and level set method)

matlab实现gamma校正的算法，用以调整光照不均的图像。(matlab to achieve gamma correction algorithm to adjust the uneven illumination of the image.)

无监督分类方法，包括kmeans，som和fcm，非常好用(Unsupervised classification methods, including kmeans, som and fcm, very easy to use)

很好的倒频谱计算程序，可立即生成图形，方便读者理解运用。(very good。)

极化SAR图像多纹理最大似然处理滤波算法，可以生成处理后的四个通道图像数据。(Multi-polarization SAR image texture filtering deal with maximum-likelihood algorithm, can be generated after the deal with the four-channel image data.)

说明：  matlab实现图像灰度变换，感受各种不同的灰度变换方法对最终图像效果的影响。(Matlab Gray Image Transform, different feelings Gray transform the ultimate effect of images.)