從網路取得關於自相關log-polar變換的實作。

数字水印进行LPM 和DFT变换，LMP变换后图像将抵抗旋转等攻击,Digital Watermarking for LPM and the DFT transform, LMP will be transformed image rotation, such as resistance to attack

用matlab绘制线性调频信号的时域波形，同时对信号进行频谱分析，并考察采样频率以及信噪比对频谱分析的影响。-Matlab drawing with linear frequency modulation signal time-domain waveform, and spectral analysis of signals and the sampling frequency and signal to noise ratio study of the impact of spectrum

this coding is for multi resolution decomposition of images using daubechies wavelet