搜索资源列表
jing_dct
- 没有用工具箱的DCT变换,采用不同压缩率,能够加深对DCT变换的了解。-Do not use toolbox of DCT, using different compression ratios, to deepen understanding of the DCT transform.
BWT
- Burrows-Wheeler转换,也称为块排序,是80年代提出来的一种新型压缩方法,对文本有很好的压缩率。-Burrows-Wheeler Transformation,also called Block Sorting
DCT
- 基于Matlab GUI的图像的DCT,自由调节压缩率,计算峰值信噪比,并图形化对比还原图像-Matlab GUI for image-based DCT, freely adjust compression rates, the peak signal to noise ratio, and reduction of image contrast graphic
huffman
- huffman编码对图形编码并进行图形重现的仿真程序,并计算了相应的压缩率。-huffman coding of graphics and graphical code to reproduce the simulation program, and calculate the corresponding compression ratio.
modulation
- 本压缩包包含ASK,FSK,PSK,CDMA调制方式的实现,均为simulink。 另外有chirp调制,以及几种方式误码率的比较。-This folder contains ASK, FSK, PSK, CDMA modulation implemented by Simulink. Besides,there is also chirp modulation, and comparison on the error rate.
Compress
- 按照用户输入的压缩率,完成对灰度图的压缩-Compression ratio in accordance with user input to complete the compression of grayscale
mainLZ77
- 本程序主要实现LZ77的编码以及解码,并且对压缩率进行了说明,简单明了-The main achievement of LZ77 encoding process and decoding, and are described on the compression ratio, simple
ex02
- 此程序给出信号的多分辨率分析(Multiresolution Analysis),即信号的多分辨率分解(Multiresolution Decomposition)方法及应用。该程序是一个多抽样率系统(Multirate System)举例,用M个的滤波器,将信号的频谱等分成M部分,使所得抽样频率降为1/M,然后再依据它们的“重要性”给一不同的bit数,那么所传输的bit流必然会进一步下降,起到压缩带宽的作用。-This program gives the signal of the multi
ezw20100301
- 对原始的EZW算法德扫描顺序进行改进,使得每个方向上的零树根增多,大大增加了压缩率。-EZW algorithm on the original scan order to improve Germany, so that each direction of the zero roots increased, greatly increased the compression ratio.
Huffman
- 实现哈夫曼编码的matlab程序,可用于图像压缩处理,还可以计算出压缩率。-Matlab program to achieve Huffman coding can be used for image compression, the compression ratio can be calculated.
wavelet_yasuo
- 基于小波变换的图像压缩程序,效果不错,压缩率高时解压得到的图像误差较小。-Based on the wavelet transform of the image compression program, the effect is good, high compression rate when the extract the image small errors
a_compress
- 音频处理要用到的几个函数,包括A率压缩,u率的,以及其附属的傅里叶变换、滤波等等,总之包含了一个音频信号简单处理的大部分程序-Audio processing functions
jpeg2000_matlab
- JPEG 2000是基于小波变换的图像压缩标准,由Joint Photographic Experts Group组织创建和维护。JPEG 2000通常被认为是未来取代JPEG(基于离散余弦变换)的下一代图像压缩标准。JPEG 2000文件的副档名通常为.jp2,MIME类型是image/jp2。 JPEG 2000的压缩比更高,而且不会产生原先的基于离散余弦变换的JPEG标准产生的块状模糊瑕疵。JPEG 2000同时支持有损数据压缩和无损数据压缩。另外,JPEG 2000也支持更复杂
CS(matlab)
- 压缩感知,又称压缩采样,压缩传感。它作为一个新的采样理论,它通过开发信号的稀疏特性,在远小于Nyquist 采样率的条件下,用随机采样获取信号的离散样本,然后通过非线性重建算法完美的重建信号。-Compressed sensing, also known as compressed sampling, compressed sensing. It as a new sampling theory, it is through the development signal sparse chara
BP
- 压缩感知Basis Pursuit基追踪算法,稀疏度和正确率的关系以及采样率和正确率的关系-Basis Pursuit based on compressed sensing and tracking relationships between sampling rate and accuracy of the algorithm, and the correct rate of sparsity
EXP6_Compress
- 调用霍夫曼编码和香农费诺压缩和解码图片,并计算压缩率(Call Hoffman encoding to compress and decode pictures, and calculate compression rates)
Block_CS_TV
- 分块图像压缩感知中的TV重构算法代码,压缩感知(compressed sensing, CS)技术可以由极少量的观测数据来重建原始信号, 极大地降低了信号采样率(TV algorithm code of block-based compressed sensing)
CS
- 因为自然界的数据都存在局部低维结构、周期性、对称性等,因此,传统的固定采样率的采样方法必然存在信息冗余。由于信息冗余的存在,我们就知道有数据压缩那么一门学科。既然这样,为什么要把冗余的数据也采进来,再进行压缩呢,能不能不把冗余的数据采集进来? 压缩感知的思路就是:在采集的过程中就对数据进行了压缩,而且这种压缩能保证不失真(低失真)的恢复原始数据,这与传统的先2倍频率采集信号→存储→再压缩的方式不同,可以降低采集信号的存储空间和计算量。 本程序是对于压缩感知模型的数学描述(Mathematics
新建 360压缩 ZIP 文件
- 基于gabor变换和pca降维的人脸识别算法,具有较高的识别率(Face recognition algorithm based on Gabor transform and PCA dimension reduction, with high recognition rate)
基于应变和应力的Vumat子程序
- 内有两个.for类型的子程序,基于Hashin失效准则,判定复合材料在静态或动态载荷下的纤维拉伸、纤维压缩、基体拉伸和基体压缩失效行为。(There are two subroutines of type. For. Based on the Hashin failure criterion. The failure behaviors of fiber tension, fiber compression, matrix tension and matrix compression under