pinyu

tf*idf algoritm is a famouse algoritm in text mining.

3D 图像拼接。把两幅不同角度的图片拼接成一幅完整的。 当程序运行时需要在每幅图上取4个点(two images taken by the same camera rotating around its approximated optical centre build a single image of the object containing correctly aligned information from both input images. )

程序采用的是两层循环上实现位移谱的求取。内循环实现在地震波下由上一步所得到的位移、速度和加速度得到下一时间间隔后的位移速度和加速度；外循环实现在不同结构自振周期（频率）下遭遇地震波的响应。(Program uses a two-layer loop on calculate displacement spectra. Cycle based on seismic waves obtained the previous step under the displacement, velocity and acceleration are next after the interval velocity and Acceleration outer loop implementation in different natural period of structure (frequency) the response under earthquake wave.)

雷达杂波建模与仿真,一种地杂波谱的计算与仿真方法等7篇关于各种雷达杂波仿真的资料(Radar Clutter Modeling and Simulation, a clutter spectrum in the calculation and simulation methods, such as 7 on a variety of radar clutter simulation data)

Transfer Matrix Optical Modeling

相似迭代算法，求解坐标变换矩阵以及位移向量，在视觉定姿中有用(Similar to the iterative algorithm, solving the coordinate transformation matrix and displacement vector, useful in the visual attitude determination)

图论中的floyd算法。简单的小程序，可以插入任何过程中，方便实用。(In graph theory algorithms. Simple procedure, you can insert any process, convenient and practical.)

计算给定点列的曲线拟合最小二乘法得到的函数(The function of least square method for curve fitting of fixed point column)

this code presents a new approach for watermarking

经典的摄像机标定程序，MATLAB编写。(calibration program with matlab)