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code for how to create of CVSD

我根据倒频谱的定义和MATLAB，给出了几种倒频谱的计算，程序如下（可在MATLAB直接使用 ）。但是，从获得的图象还是找不出我要找出的频率。(In accordance with the definition of cepstrum and MATLAB, are given several cepstrum calculation procedures are as follows (which can be used directly in MATLAB). However, access to or can not find the image I would like to find out the frequency.)

differantiating two images

This is the push-pull converter simulation using matlab

DCT and Image Compression In the JPEG image compression algorithm, the input image is divided into 8-by-8 or 16-by-16 blocks, and the two-dimensional DCT is computed for each block. The DCT coefficients are then quantized, coded, and transmitted. The JPEG receiver (or JPEG file reader) decodes the quantized DCT coefficients, computes the inverse two-dimensional DCT of each block, and then puts the blocks back together into a single image. For typical images, many of the DCT coefficients have values close to zero these coefficients can be discarded without seriously affecting the quality of the reconstructed image. The example code below computes the two-dimensional DCT of 8-by-8 blocks in the input image, discards (sets to zero) all but 10 of the 64 DCT coefficients in each block, and then reconstructs the image using the two-dimensional inverse DCT of each block. The transform matrix computation method is used.

通过给出的随机过程，该随机过程是由3个实正弦信号组成，归一化频率分别为0.1,0.25,0.27，其中相位是相互独立在【0,2*pi】上分布的随机相位；噪声是均值为0、方差为1的实高斯白噪声，信噪比为30db,30db,27db,观测样本数为N，通过bartlett法，Welch法，周期图法计算随机过程的概率谱(Given by stochastic process, the stochastic process is composed of three real sine signal, the normalized frequency were 0.1, 0.25, 0.27, including phase is independent in [0, 2* PI] on the distribution of random phase Noise variance is the mean to 0, 1 real gaussian white noise, signal to noise ratio of 30 db, 30 db, db, and the observation sample for N, by bartlett, Welch, periodogram spectrum method to calculate the probability of the random process)

It consider spectrum estimation, using Marple s test case

基于有限元的矩形短边双脊波导的传输特性matlab代码包括衰减系数，单模带宽，截止波长功率容量等(Based on the short side of the rectangular finite element double-ridged waveguide transmission characteristics include attenuation coefficient matlab code, single-mode bandwidth cutoff wavelength power capacity, etc.)

Snake Methods for Image 2D

SIFT特征和正交DLT算法在物体识别中的应用.(SIFT features and orthogonal DLT algorithm in object recognition.)