FFT傅立叶频谱分析，从程序的演示可透视出频率频谱相互的换算与复数的关系！-FFT Fourier spectral analysis, from a procedural perspective of the presentation can be a frequency spectrum of the conversion of mutual relations with the plural!

：针对常用坐标转换定位算法精确度和效率较低的问题，提出一种基于透视变换原理的定位算法。根据4 个初始定位点的坐标信息， 确定反映点与点之间空间映射关系的单应性矩阵。定位完成后，利用该矩阵进行简单运算即可完成坐标转换。实验结果证明该方法稳定性 较高。-Positioning algorithm for common coordinate conversion accuracy and low efficiency problem, a perspective transformation

使用n点透视算法来估计相机位姿。实现了多种n点透视算法，采用统一的框架。-Use the n-point perspective algorithm to estimate the camera position. To achieve a variety of n-point perspective algorithm, using a unified framework.