matlabf非常好基于Contourlet变换的水印算法.与小波变换不同的是Contourlet变换采用类似于线段（contoursegment的基得到一种多分辨、局部化、方向性的图像表示。水印信号通过基于内容的乘性方案加载到Contourlet 变换系数-matlabf very good Contourlet Transform-based watermarking algorithm. and wavelet transform is different Contourlet trans

Image-guided surgery is one other important application of segmentation. Recent advances in technology have made it possible to acquire images of the patient while the surgery is taking place. The goal is then to segment relevant regions of int

Display the original image and to a gca format.The image is convert into rgb2hsv the segment the original image. And extracted the feature in the segmented image.-Display the original image and to a gca format.The image is convert into rgb2hsv the

基本知识 绘制矩形 清除矩形区域 圆弧 路径 绘制线段 绘制贝塞尔曲线 线性渐变 径向渐变（发散） 图形变形（平移、旋转、缩放） 矩阵变换（图形变形的机制） 图形组合 给图形绘制阴影 绘制图像（图片平铺、裁剪、像素处理[不只图像、包括其他绘制图形]） 绘制文字 保存和恢复状态（context） 保存文件 结合setInterval制作动画(basic knowledge Draw rectangle Clear rectangular area Arc