ellipse

A simple function that takes an image and a mask as the input, perform compression and decompression on the image (color image compression if input image is color), and display the original and reconstructed images side by side. The program should also be able to compute the SNR of the reconstructed image.

Entropy calculation of a file

说明：  这是一个可以手动点击图片上任意一个点的时候，可以查看该点的亚像素坐标，精确到0.0001(This is a can manually click on the picture when any one point, you can see the point of the sub-pixel coordinates, accurate to 0.0001)

matlab函数scaleif，用于改变度量，详见英文描述( function sim = scaleif(im, newMin, newMax, oldMin, oldMax) Scales an image such that its lowest value attains newMin and it highest value attains newMax. OldMin and oldMax are not necessary but are useful when you don t want to use the true min or max value.)

A guide to matlab for beginner

algorithme id3 pour construire les arbres de decision

用matlab的100个编程例子，可以学习学习，供大家更好的理解掌握MATLAB。(100 matlab programming examples, you can learn, we can better understand and grasp the MATLAB.)

求弹簧-阻尼系统的固有频率和固有振型，并计算系统的响应。(The natural frequencies and natural modes of the spring damping system are calculated and the response of the system is calculated.)

说明：  使用统计的方法来实现纹理特征提取，很有用的一个方法(Use statistical methods to achieve the texture feature extraction, a method useful)

用希尔伯特黄变换（HHT）求时频谱和边际谱.包括代码、原理、截图分析(Hilbert Huang transform (HHT) Find the spectrum and marginal spectrum, including the code, schematic, screenshot analysis)