Description: JPEG 标准的最新进展是 1996 年开始制定， 2001 年正式成为国际标准的 JPEG 2000 。与 JPEG 相比， JPEG 2000 作了大幅改进，其中最重要的是用离散小波变换（ DWT ）替代了 JPEG 标准中的离散余弦变换。在文件大小相同的情况下， JPEG 2000 压缩的图像比 JPEG 质量更高，精度损失更小。作为一个新标准， JPEG 2000 暂时还没有得到广泛的应用，不过包括数码相机制造商在内的许多企业都对其应用前景表示乐观， JPEG 2000 在图像压缩领域里大显身手的那一天应该不会特别遥远。 -JPEG standard on the latest progress of the development started in 1996 and in 2001 became the international standard JPEG 2000. Compared with JPEG, JPEG 2000 made substantial improvements, the most important of which is discrete wavelet transform (DWT) instead of the JPEG standard discrete cosine transform. The file size under the same circumstances, JPEG 2000 compressed images of higher quality than JPEG, precision small loss. As a new standard, JPEG 2000 has not yet been widely applied, including digital camera manufacturers in many enterprises have their applications are optimistic about the prospects of the JPEG 2000 image compression areas prone to the day should not particularly remote. Platform: |
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Author:ldwe |
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Description: 数字图像处理实验
根据原图像的直方图，发现背景和目标的分割值大约在130左右，并将灰度图像转为二值图像，分割效果比较理想。
图像处理实验（六）图像压缩与编码
实验目的： 学习JPEG压缩编码
实验内容：
一．实现基本JPEG的压缩和编码分三个步骤：
1． 首先通过DCT变换去除数据冗余；
2． 使用量化表对DCT系数进行量化；
3． 对量化后的系数进行Huffman编码。-digital image processing experiments based on the original image histogram, found background and objectives of the divided about the value of around 130 and two gray-scale image to image, Segmentation more satisfactory results. Image processing experiments (6) Image Compression and Coding of the experiment : Learning JPEG compression coding experiment : one. Basically JPEG compression and coding in three steps : 1. First through DCT remove data redundancy; 2. Using quantitative table right DCT coefficient quantization; 3. Right quantized coefficients of Huffman coding. Platform: |
Size: 4096 |
Author:qq |
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Description: 数字图像矩阵数据的显示及其傅立叶变换
二维离散余弦变换的图像压缩
采用灰度变换的方法增强图像的对比度
直方图均匀化
模拟图像受高斯白噪声和椒盐噪声的影响
采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
图像的自适应魏纳滤波
运用5种不同的梯度增强法进行图像锐化
图像的高通滤波和掩模处理
用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理
利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理
-digital image data matrix display and its Fourier transform two-dimensional discrete cosine transform image compression using gray change The method for enhancing the contrast of the image histogram equalization simulated images by white Gaussian noise and Impulse noise impact 2D Median filter function medfilt2 right by the Salt and Pepper noise interference with the image filtering MATLAB functions fi lter2 right by the noise of image filtering images using adaptive filtering Weiner five different gradient growth Intensity image sharpening images and high-pass filter mask Processing Butterworth (Butterworth) lowpass Filter by the noise of the image smoothing use Butterworth (Butterworth) high-pass filter filter on the image sharpening Platform: |
Size: 10240 |
Author:王晓明 |
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Description: MATLAB数字图象处理的主要源码.包括图象去噪变换增强恢复识别压缩的各种算法-MATLAB digital image processing the main source. Transform Image Denoising including enhanced recovery recognition of the compression algorithms Platform: |
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Author:邓鹏 |
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Description: 一种实用的数字图像压缩方法解振东，章三妹(成都理工大学信息工程学院，成都610059)摘 要：提出以C++Builder 6．0为开发平台，以其所提供的TJPEGImage为核心，实现真彩色图像的压缩，为工程实际的应用提供了一种非常实用的压缩手段。该方法减少了大量程序代码的编写工作。实验表明，当综合压缩比设为65时，压缩图像与原图像相比并无明显变化，由此可见，压缩效果令人满意。-a practical method of digital image compression solutions Zhendong, Chapter Sanmei (Chengdu University of Technology and Information Engineering College, Chengdu 610059) Abstract : C Builder 6.0 development platform to the provision of core TJPEGImage to achieve true color image compression. for the practical application provides a very practical means of compression. The ways to reduce the large number of code-writing. Experiments show that when integrated compression ratio is set to 65 hours, compressed images compared with the original image and no noticeable change, it can be seen that Compression satisfactory. Platform: |
Size: 269312 |
Author:ghostsx |
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Description: Huffman编码实现数字图象压缩，解压．对数字图象的压缩的步骤之一编码和解压步骤之一解码有很大的帮助．-Huffman coding of digital image compression, decompression. On digital image compression encoding one of the steps towards one of the steps to extract and decode a great help. Platform: |
Size: 10240 |
Author:梦铃 |
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Description: 这是我做的毕业设计，是基于DSP的数字图象压缩系统的实现。本系统能很好的压缩图象，系统运行时间快，压缩比也比较高。其中采用JPEG标准对图象进行压缩，使用了Huffman算法。-This is what I am doing graduate design is based on the DSP digital image compression system is achieved. The system can be a very good image compression, faster system running time, the compression ratio is relatively high. Which use JPEG standard for image compression, the use of the Huffman algorithm. Platform: |
Size: 322560 |
Author:高燕 |
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Description: 一本名叫<数字图像处理、压缩与识别技术>,对于希望学习图象处理,压缩,识别的同学很有帮助.-A named <digital image processing, compression and recognition technology>, who want to learn image processing, compression, recognition of students helpful. Platform: |
Size: 4711424 |
Author:nan |
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Description: 各种数字图像处理的算法及编程实现源码。主要内容包括：位图基础、图像的显示、图像的几何变换、图像灰度变换、图像的平滑处理、图像锐化处理及边缘检测、图像分割及测量、图像的形态处理学、图像的变换域处理及应用、图像的合成、24位彩色图像的处理、图像的小波变换和JPEG图像的压缩编码。-A variety of digital image processing algorithms and programming source code. The main contents include: basis bitmap, image display, image geometric transformation, image transformation, image smoothing, image sharpening and edge detection, image segmentation and measurement, image handle the form of science, image transform domain treatment and application, image synthesis, 24-bit color image processing, image of the wavelet transform and JPEG image compression coding. Platform: |
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Author:邓玥琳 |
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Description: 一種基于塊樹結構的SPIHT數字圖像壓縮算法: 在分析圖像經過小波變換后所具有的特性的基礎上,提出了一種改進的SPIHT算法.由于低頻系數占據圖像的百分之九十以上的能量,在圖像的重構中十分重要,所以,對這些系數不進行壓縮而直接傳輸 而最高頻系數相對不重要,所以不做處理,只在圖像重構時以指定的數值予以重構,因此不僅提高了圖像的質量,同時提高了圖像的壓縮率.在具體的算法中,提出了塊樹的結構,減少了算法所需的內存,拓寬了算法的應用范圍.-A tree structure based on the SPIHT block of digital image compression algorithm: After the analysis of images after the wavelet transform features, based on a modified SPIHT algorithm. Due to the low frequency coefficient images occupy more than 90 percent of energy in image reconstruction is very important, so these factors do not directly transfer compression The most high-frequency coefficient is relatively unimportant, so no treatment, only when the image reconstruction be designated numerical reconstruction therefore not only improve the image quality, while improving the image compression ratio. algorithms in specific, the proposed block-tree structure, the algorithm to reduce memory requirements and broaden the scope of application of the algorithm. Platform: |
Size: 273408 |
Author:jason.. |
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Description: 利用霍夫曼编码算法对数字图像进行压缩及解压缩处理，解压出来的图像与源图像几乎完全一致，峰值信噪比为无穷大-The use of Huffman coding algorithm for digital image compression and decompression processing, extracting images from the source image is almost exactly the same infinite PSNR Platform: |
Size: 168960 |
Author:tianjieyu |
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Description: matlab 做的双正交小波变换，用于图像压缩处理（仅供大家参考）-biorthogonal digital wavelet transform by using matlab,for digital image compression and processing Platform: |
Size: 3072 |
Author:zhoulei |
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Search - digital image compression