Description: 用MATLAB进行静态图像压缩编程中的游长编码部分的程序实现-using MATLAB programming static image compression of outbound long-coding part of the program Platform: |
Size: 1024 |
Author:黄宇 |
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Description: 用matlab编写的图像压缩程序，可以实现图像的压缩-Prepared to use matlab image compression program, you can realize the image compression Platform: |
Size: 1024 |
Author:后街幽灵 |
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Description: 基于Matlab的数字图像相关法的程序实现，本文简单介绍了基于小波变换的图像分解和重构，在此基础上讨论了Matlab语言环境下图像压缩和图像融合的基本方法。-Matlab-based digital image correlation method of the program, this article briefly introduce the wavelet-based image decomposition and reconstruction, on the basis of discussion under the Matlab language environment image compression and image fusion of the basic method. Platform: |
Size: 873472 |
Author:feng |
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Description: 利用DCT变化对tif图像进行压缩利用DCT变换进行图像压缩的MATLAB程序-Changes in the use of DCT compression of tif images using DCT transform image compression MATLAB program Platform: |
Size: 802816 |
Author:ruiomar |
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Description: The frequency domain plays an important role in image
processing to smooth, enhance, and detect edges of images. Although
image data typically does not include imaginary values, the fast Fourier
transform (FFT) has been used for obtaining spectra. In this paper,
the fast Hartley transform (FHT) is used to transform two-dimensional
image data. Because the Hartley transform is real valued, it does
not require complex operations. Both spectra and autocorrelations of
two-dimensional ultrasound images of normal and abnormal livers were
computed. Platform: |
Size: 4096 |
Author:archit |
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Description: 一种新的基于matlab环境的用SVD原理实现图像压缩的源程序，程序简单易懂-Implementation of new image compression using SVD, the program easy to understand Platform: |
Size: 6144 |
Author:国华 |
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Description: 在对基本的域分形图像压缩方法进行分析基础上提出了一种改进方案即基于自适应分类加权最小二乘法的域分形图像压缩方法并使用基本方法和改进方法对标准灰度图像分别进行了测试测试结果表明本文提出的方法可以在下降很小的情况下大大提高编码速度-In the domain of the basic fractal image compression method based on an analysis of an improved program that is based on adaptive classification domain weighted least squares fractal image compression method and use the basic methods and standards to improve the method of gray-scale images were the test results show that the method proposed in this paper can be very small in the case declined significantly improve the coding speed Platform: |
Size: 180224 |
Author:chenruibao |
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Description: 已知两个不同图像块亮度数据如下：
（1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。
（2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。
（3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。
（4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ）
（5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由此分析直流和低频系数的重要性。
-Known brightness of two different image data block is as follows: (1) Principles of analysis of DCT, the DCT method, program and calculate the corresponding DCT coefficient, analysis of distribution coefficients. (2) quantitative analysis based on visual characteristics of the distribution of long-form features step-by-step to complete the DCT coefficient quantization. (3) the use of Z-scan output data to achieve statistical encoding, the formation of Video stream. (4) the use of the reconstructed image brightness IDCT data to calculate the SAD size, analysis of the causes of errors and the use of DCT for the principle of data compression. () (5), respectively, a factor of 1,3,6 using the upper left corner of the reconstruction of images, calculating the corresponding SAD, and the resulting analysis of DC and the importance of low-frequency coefficients. Platform: |
Size: 1024 |
Author:张元 |
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Description: matlab简易游程编码，针对二值灰度图像。
有压缩和加压及主程序部分，压缩和加压函数调用。-matlab simple run-length coding for gray image binarization. There are compression and pressure and the main program of the compression and compression function call. Platform: |
Size: 1024 |
Author:陈自远 |
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Description: SPIHT(多级树集合分裂算法)对图像压缩有很大的推进作用,此为原始代码,进行过仿真,程序结构清晰.-SPIHT (set of multi-level tree splitting algorithm) on the image compression to promote the role of a great, this is the original code, and carried out simulations, program structure clear. Platform: |
Size: 192512 |
Author:徐萍 |
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Description: This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious.
-This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious.
Platform: |
Size: 3072 |
Author:Ho Joon Lee |
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Description: This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious.
-This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious.
Platform: |
Size: 95232 |
Author:Ho Joon Lee |
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Description: 2D-DCT 压缩图像后，通过QPSK,AWGN信道编码传输后，IDCT解压缩回原始图像，适用于任何图像-Using DCT to compress the orginal image, I use zigzag program, quantization, dct compression, then change the vector to bineary bit to pass through the QPSK channel. And from the binary array, I use IDCT to reconstructe the orignial image. working perfectly. Platform: |
Size: 4036608 |
Author:Jackie |
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Description: 该程序利用Matlab编写，并带有GUI截面。实现了任意格式图像压缩的功能。并且可以对比显示压缩前后图像，显示压缩比例和压缩时间。-The program prepared by the use of Matlab, and with a GUI cross-section. Image compression format to achieve an arbitrary function. Compared before and after the show and can compress the image, showing compression ratio and compression time. Platform: |
Size: 2048 |
Author:wangwei |
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Description: 里面包含有所有的matlab下的运行程序 还有相应的计算需要的图像 非常全面 另外图像压缩的源码大多集中在灰度图上,此源码是基于彩色图像的-Which contains all of the matlab run the program under the corresponding calculation also requires a very comprehensive image of the source code for other image compression are mostly concentrated in grayscale, this source is based on the color image Platform: |
Size: 611328 |
Author:韩玉兰 |
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Description: 基于Matlab的JPEG2000图像压缩实现，离散小波变换DWT，程序中图片的位置修改下可以自己运行程序看到效果-Matlab-based implementation of the JPEG2000 image compression, discrete wavelet transform DWT, where the image changes the program may be run its own program to see results Platform: |
Size: 2048 |
Author:张松松 |
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Description: 自己编写的一个基于matlab的图像压缩程序，有GUI界面，不能程度的压缩效果以及信噪比。-His writing of a based on the matlab image compression program, a GUI interface, can t degree of compression effect and signal-to-noise ratio.
Platform: |
Size: 459776 |
Author:robert |
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Search - matlab program of image compression