计算图像信息熵

vtk显示点云，和点云三角网格化。 源代码已可运行，不过vtk的环境需要你自己配置(vtk display point clouds, and point cloud triangular grid. Source code has been run, but vtk environment requires you to configure)

说明：  用matlab实现color moments算法，先把rgb图像转换到HSV空间，然后计算每个分量的一二三阶矩，最后组成9维向量进行比较。(Using color moments algorithm matlab realize, first convert rgb images to HSV space, and then calculated for each component of the 123-order moments, the final composition of 9-dimensional vector for comparison.)

说明：  基于RSA的图像加密过程，进过扩散等进行加密处理。(Based on the blockchain image encryption process, through diffusion and other encryption processing.)

MATLAB源码，使用多种算法进行图像质量评价(MATLAB source code, using a variety of algorithms for image quality evaluation)

本程序是基2的时间抽取FFT变换，可以将信号从时域转换到频域。(This procedure is the base 2 time extraction FFT transform, can transform the signal from time domain to frequency domain.)

说明：  1. 掌握利用脉冲响应不变法设计IIR数字滤波器的原理和具体方法。 2. 加深理解数字滤波器与连续时间滤波器之间的技术指标转化。 3. 掌握脉冲响应不变法设计IIR数字滤波器的优缺点及使用范围(1. Master the principle and specific method of designing IIR digital filter with impulse response invariant method. 2. Deepen the understanding of the technical index transformation between digital filter and continuous time filter. 3. Master the advantages, disadvantages and application scope of the design of IIR digital filter by the pulse response invariant method)

1. 将真彩位图转化成各色或黑白位图，进行二值化(支持多种抖动方法)处理后的位图，效果和速度极佳。 2. 将真彩或黑白位图进行 90度 , 180 度 ,270 度 高速度旋转。 (1. The true color bitmap into a colored or black and white bitmap to binary (supports multiple dithering methods) treated bitmap, effects and excellent speed. 2. The true color or black and white bitmap to 90 degrees, 180 degrees, 270-degree high-speed rotation.)

说明：  利用PCA对人脸图像进行降维，然后训练神经网络分类器的Matlab程序(the Matlab in face recoginization using PCA algorithm)

matlab作图 截断y坐标画法 可以自定义截断y坐标范围(matlab code break y axis)

基于二维直方图最大熵阈值法的图像分割算法，可选取较好的阈值实现图像分割(failed to translate)