zishiiying

Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication of multimedia data in a networked environment, since it makes possible to identify the author, owner, distributor or authorized consumer of a document. A new watermarking technique to add a code to digital images is presented: the method operates in the frequency domain embedding a pseudo-random sequence of real numbers in a selected set of DCT coefficients. Watermark casting is performed by exploiting the masking characteristics of the Human Visual System, to ensure watermark invisibility. The embedded sequence is extracted without resorting to the original image, so that the proposed technique represents a major improvement to methods relying on the comparison between the watermarked and original images.

DNA编码序列算法，很好用的，可以学习学习(DNA sequence encoding algorithm, very good use, you can learn)

模拟二维可压缩超音速风动内的流动参数随风动形状的变化(Simulate the two-dimensional compressible supersonic wind-driven flow parameters in the wind dynamic changes in shape)

高信噪比实测数据线谱提取，使线谱提取的一种典型方法(high signal-to-noise ratio measured spectral line data extraction, spectral lines from a typical method)

to help in computer vision ,pattern recognition and machine learning research for grad students in image analysis and computer science works of masters and doctorate

this file contains some m-files about calculating the fractional fourier transform

模拟数字基带系统在matlab下的实现，包括输入输出信号的码型，功率谱密度，眼图及误码率(Analog-to-digital base-band system in the realization of matlab, including the code input and output signal type, the power spectral density, eye diagram and bit error rate)

Signal And Systems Lab_6

基于matlab的pso粒子群算法 很有用(matlab pso)

ga tuned input shaper