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Description: Wavelets have widely been used in many signal and image processing applications. In this paper, a new
serial-parallel architecture for wavelet-based image compression is introduced. It is based on a 4-tap wavelet
transform, which is realised using some FIFO memory modules implementing a pixel-level pipeline
architecture to compress and decompress images. The real filter calculation over 4 · 4 window blocks is
done using a tree of carry save adders to ensure the high speed processing required for many applications.
The details of implementing both compressor and decompressor sub-systems are given. The primarily analysis
reveals that the proposed architecture, implemented using current VLSI technologies, can process a
video stream in real time.-Wavelets have been widely used in many sign al and image processing applications. In this p aper. a new serial-parallel architecture for wavele t-based image compression is introduced. It is based on a 4-tap wavelet transform. which is realized using some FIFO memory module 's implementing a pixel-level pipeline archite cture to compress and decompress images. The're al filter calculation over 4 blocks window is done using a tree of carry save adders to ensure t he high speed processing required for many appl ications. The details of implementing both com pressor decompressor and sub-systems are give n. The primarily analysis reveals that the prop osed architecture, VLSI implemented using current technologies, can process a video stream in real time.
Platform: |
Size: 2837459 |
Author: sdfafaf |
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Description: 输入：为需要压缩图象的名称,该主程序仅能构处理256灰度图,读者可以自行改编为RGB处理；ratio为压缩比率；level为小波分解的级数
输出:是解压完毕的图象数据矩阵-input : the need for image compression name, the main program can only handle 256 gray level structure, Readers can own adaptation of RGB; ratio of compression ratio; wavelet decomposition level for the series output : is finished unpacking the image data matrix
Platform: |
Size: 54779 |
Author: 林颖 |
Hits:
Description: I think this the first time every one can look at a PE crypter source
in top level language such VC++.
So as I promised ... if some one sent me one nice compress source I would
publish my source.
I dedicate this source to all people who involve in this field.
I hope it helps someone.
Have good days
ashkbiz
Check: yodap.cjb.net
Platform: |
Size: 49832 |
Author: 李泉 |
Hits:
Description: This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet.
For eg:-wavelets can be haar, db1, db2,dmey...............
Decomposition can be viewed in figure.
(Please note that select 256X256 image for better result.)
Then compression can performed,
PERFL2 give compression score.
Then reconstruction can be performed.
Each decompsition we can choose different threshold values.
For each threshold value we can calculate mse,psnr,pq(picture quality),
bit ratio etc. To get pq install pqs function .
Platform: |
Size: 3674 |
Author: 陈语恬 |
Hits:
Description: The Fujitsu MB86H55, MB86H56 can compress and decompress full High-Definition (HD) video (1920 dots x 1080 lines) in the H.264 format in real-time. The two products feature power consumption of only 500mW during Full HD encoding including the in-package memory, an industry-leading level for low power consumption. In addition, MB86H56 offers processing of Full HD video at 60p, to improve picture quality even further.
Platform: |
Size: 739966 |
Author: leo_adair@126.com |
Hits:
Description: Wavelets have widely been used in many signal and image processing applications. In this paper, a new
serial-parallel architecture for wavelet-based image compression is introduced. It is based on a 4-tap wavelet
transform, which is realised using some FIFO memory modules implementing a pixel-level pipeline
architecture to compress and decompress images. The real filter calculation over 4 · 4 window blocks is
done using a tree of carry save adders to ensure the high speed processing required for many applications.
The details of implementing both compressor and decompressor sub-systems are given. The primarily analysis
reveals that the proposed architecture, implemented using current VLSI technologies, can process a
video stream in real time.-Wavelets have been widely used in many sign al and image processing applications. In this p aper. a new serial-parallel architecture for wavele t-based image compression is introduced. It is based on a 4-tap wavelet transform. which is realized using some FIFO memory module 's implementing a pixel-level pipeline archite cture to compress and decompress images. The're al filter calculation over 4 blocks window is done using a tree of carry save adders to ensure t he high speed processing required for many appl ications. The details of implementing both com pressor decompressor and sub-systems are give n. The primarily analysis reveals that the prop osed architecture, VLSI implemented using current technologies, can process a video stream in real time.
Platform: |
Size: 2837504 |
Author: sdfafaf |
Hits:
Description: 输入：为需要压缩图象的名称,该主程序仅能构处理256灰度图,读者可以自行改编为RGB处理；ratio为压缩比率；level为小波分解的级数
输出:是解压完毕的图象数据矩阵-input : the need for image compression name, the main program can only handle 256 gray level structure, Readers can own adaptation of RGB; ratio of compression ratio; wavelet decomposition level for the series output : is finished unpacking the image data matrix
Platform: |
Size: 54272 |
Author: 林颖 |
Hits:
Description: I think this the first time every one can look at a PE crypter source
in top level language such VC++.
So as I promised ... if some one sent me one nice compress source I would
publish my source.
I dedicate this source to all people who involve in this field.
I hope it helps someone.
Have good days
ashkbiz
Check: yodap.cjb.net
Platform: |
Size: 49152 |
Author: 李泉 |
Hits:
Description: java实现zip文件压缩解压，功能封装在一个类中，支持中文及多级目录，可以一直移植windows和unix上使用，包中提供了源代码及代码中用到的外部包-java realize extracting zip file compression, functional class in a package to support Chinese and multi-level directory, you can always transplant the use of windows and unix, package provides the source code and the code used in the external packet
Platform: |
Size: 25600 |
Author: zhanglei |
Hits:
Description: This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet.
For eg:-wavelets can be haar, db1, db2,dmey...............
Decomposition can be viewed in figure.
(Please note that select 256X256 image for better result.)
Then compression can performed,
PERFL2 give compression score.
Then reconstruction can be performed.
Each decompsition we can choose different threshold values.
For each threshold value we can calculate mse,psnr,pq(picture quality),
bit ratio etc. To get pq install pqs function . -This program compress and recostruct using wavelets. We can select level of decomposition (here maximum 4 levels are given) of images using selected wavelet.For eg:-wavelets can be haar, db1, db2, dmey ........ ....... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score.Then reconstruction can be performed.Each decompsition we can choose different threshold values . For each threshold value we can calculate mse, psnr, pq (picture quality), bit ratio etc. To get pq install pqs function.
Platform: |
Size: 3072 |
Author: 陈语恬 |
Hits:
Description: 这个matlab程序实现了基于SPIHT多级树集合分裂的图像压缩算法。
-Matlab implementation of this procedure based on the SPIHT multi-level set to split the tree image compression algorithm.
Platform: |
Size: 269312 |
Author: 王玲 |
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Description: 分层和全局的阈值作用下对比小波压缩效果，及其谱图的不同-global and by level walvelet compress comparission
Platform: |
Size: 1024 |
Author: 蒋岱琦 |
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Description: 使用huffman tree实现的压缩工具，可以对多级文件夹进行压缩-Achieved using the huffman tree compression tool that can compress the multi-level folder
Platform: |
Size: 234496 |
Author: 可爱的小蓝熊 |
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Description: 一个文件压缩程序，用汇编语言写的，其优点是运行速度比高级语言快很多-A file compression program, written in assembly language, the advantage of the running speed is much faster than the high-level language
Platform: |
Size: 5120 |
Author: jack |
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Description: 同态滤波可用于压缩图像灰度的动态范围，且增强对比度-The filter can be used to compress the dynamic range of gray level, and enhance the contrast.
Platform: |
Size: 1024 |
Author: nancy |
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Description: 如果一副图像的像素占有很多的灰度级而且分布均匀，那么这样的图像往往有高对比度和多变的灰度色调。直方图均衡化就是一种能仅靠输入图像直方图信息自动达到这种效果的变换函数。它的基本思想是对图像中像素个数多的灰度级进行展宽，而对图像中像素个数少的灰度进行压缩，从而扩展像原取值的动态范围，提高了对比度和灰度色调的变化，使图像更加清晰。-If an image pixel occupies a lot of gray level and evenly distributed, so such images tend to have high contrast and varying shades of gray. Histogram equalization is a kind of input image histogram information alone can automatically achieve this effect transformation function. Its basic idea is the number of pixels in an image more gray-level broadening, while the number of pixels in the image of a small gray compress like to extend the dynamic range of the original value, improved contrast and gray tones changes to make the image clearer.
Platform: |
Size: 234496 |
Author: 张聪 |
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