-146867_GzFUZ1W5R1iY

此程序用于返回图象变换前后的信噪比,只需简单输入图象名,即可返回结果(This procedure for the return of the signal to noise ratio images before and after transformation, you simply enter the image name, to return to the results of)

研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散 余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的 K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角 阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这 反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特 性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。 虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。 (Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect. Although from related to the performance of the sense, DCT is a kind o)

关于高斯塞德尔和雅可比矩阵以及牛顿拉佛逊法的详细例子,主要是采用matlb中的语言编写的(Sise and Bender on the high Jacobian matrix and the Newton Raphson method Laffer detailed examples, mainly used in languages matlb)

zernike与patran得借口程序，编制机械软件patran的节点与matlab实现对口互接，用matlab复原分析元件，从而适合下一步数据处理即zernike波面拟合与数据分析(gram-schmidt and hosehouder algorithms, stability test procedures for the adoption of gram-schmidt algorithm hosehouder correctness of the algorithm is suitable for engineering complex operator)

controlled Half wave rectifier circuit with inductive load and gives positive half cycle and block negative half cycle.

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说明：  MATLAB图形用户界面设计MATLAB图形用户界面设计MATLAB图形用户界面设计(MATLAB graphical user interface design, graphical user interface design MATLAB MATLAB graphical user interface design)

对图像进行压缩编码的matlab程序,包括霍夫曼编码、算数编码、行程编码等方法。(Matlab codes for picture processing, including Huffman coding, run-length coding and arithmetic coding.)

改进的合成孔径雷达成像，可实现大斜视的成像，有点目标的仿真！(about missile-borne SAR ，verified by matlab，maybe useful.)

MATLAB SIMULATION EXAMPLE