此代码用于从CAD所生成的DXF文件中提取所需的实体数据，该数据是来完成自动编程系统的关键数据。...

B样条曲线的生成，我们平时实验课上做的实验．-B-spline curve generation, we usually do experiments on the experiment.

我自己编写的图像处理小程序-I prepared the small image processing procedures

1，画一个三棱锥（或三棱柱）穿透一个立方体，并用Z_buffer算法消隐，其中立方体和三棱锥的各个面用不同的颜色表示 2，用动画实现穿透的全过程并且实现光照 立方体可以旋转运动 三棱锥可一上下穿透 关键词：Z缓冲器算法 Z向深度缓存算法 Z_buffer Phong光照模型 -a painting a three pyramid (or three prism) penetrating a cube. Z_buffer algorithm using hidden, cube and the three pyramid-all with different colors 2, Animation achieve penetration with the entire process and achieve illumination cube rotation can be a three pyramid next penetrating Keywords : Z Z-buffer algorithm to the depth buffer algorithm Z_buffer Phong illumination model

三维地形绘制－－四叉树递归算法 .比较具有参考价值,值得借鉴-Three-dimensional topographical map- quadtree recursive algorithm. Compared with the reference value, it is worth drawing

很特别的彩色画笔,不需要画板,在任何平面都可以书写,全部代码.-very special color brush, and not slate, in any plane can write all the code.

生产成多项式的基函数，输出为一个矩阵，可产生任意阶。-Production into the polynomial basis functions, the output of a matrix, can produce arbitrary order.

一个基于vc的关于数字水印技术的实现系统，它能对基于小波变换的内容事项-a vc based on digital watermarking technology to achieve system, it can based on wavelet transform the content matters

图像的翻转，我是个初学者，只是尝试，如果用可以打开看看，可用。-reversal the picture，if you need ，you can record ，i think ,donot need more explaination。

一本原版的视频编码器设计图书，非常易懂，但是将视频编码中的原理和设计方法讲的很透彻。-an original video encoder design books, very understandable, but the video coding theory and the design method for the very thorough.

北京大学遥感所的研究生图像处理讲义高级遥感数字图像处理（硕士生课程）之第三章 数字图像显示-Peking University