Description: bmp与jpeg图像格式间的相互转换
可以设置JPEG的压缩品质；
适用于8BIT灰度图和24BIT真彩色图像-jpeg image with bmp format conversion between the setting up of quality JPEG compression; in 8BIT grayscale and color images 24BIT Platform: |
Size: 427350 |
Author:lx |
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Description: vb jpeg编码这是一个比较完整的JPEG压缩程序，支持 彩色/灰度、Y分量水平/垂直采样律、图像质量 调整。使用的是最简单的基线系统（BaseLine）压缩方式，量化表及Huffman表都是与ACDSee一致的，没有提供自适应Huffman表压缩功能。-vb jpeg coding This is a relatively complete JPEG compression process, support for color / grayscale, Y component level / vertical sampling law, image quality adjustment. The use of the most simple baseline system (BaseLine) compression method to quantify the Huffman table and the table with ACDSee are the same, and did not provide adaptive Huffman compression table. Platform: |
Size: 85973 |
Author:王宇 |
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Description: vb jpeg编码这是一个比较完整的JPEG压缩程序，支持 彩色/灰度、Y分量水平/垂直采样律、图像质量 调整。使用的是最简单的基线系统（BaseLine）压缩方式，量化表及Huffman表都是与ACDSee一致的，没有提供自适应Huffman表压缩功能。-vb jpeg coding This is a relatively complete JPEG compression process, support for color/grayscale, Y component level/vertical sampling law, image quality adjustment. The use of the most simple baseline system (BaseLine) compression method to quantify the Huffman table and the table with ACDSee are the same, and did not provide adaptive Huffman compression table. Platform: |
Size: 86016 |
Author:王宇 |
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Description: bmp与jpeg图像格式间的相互转换
可以设置JPEG的压缩品质；
适用于8BIT灰度图和24BIT真彩色图像-jpeg image with bmp format conversion between the setting up of quality JPEG compression; in 8BIT grayscale and color images 24BIT Platform: |
Size: 427008 |
Author:lx |
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Description: 使用二维离散余弦变换(DCT)进行图象压缩。原始图象被转换成为8*8大小的块进行压缩和重构。 Cnum:为压缩时保留的系数的个数 MSM:均方误差压缩应该做到在最合理的近似原图象的情况下使用最少的系数。函数：dctmtx:返回一个n*n阶DCT变换 blkproc:对图象进行不同的块处理。 im2col:重排图象块为矩阵列。注意：只适用于灰度图象。-The use of two-dimensional discrete cosine transform (DCT) for image compression. Original image is converted to become the size of 8* 8 block compression and reconstruction. Cnum: reservations for the compression factor of the number of MSM: mean square error compression should be done in the most reasonable approximation of the original image using the least coefficient. Function: dctmtx: returns an n* n-order DCT transform blkproc: image processing of different blocks. im2col: rearrangement of the matrix block out images. Note: only applicable to grayscale images. Platform: |
Size: 3072 |
Author:hff |
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Description: 标准C++/C处理BMP图像，没有使用VC中的BITMAP类及任何不在ANSI-C中的结构和函数。采用了k_means压缩算法处理24bit（可以更改源码使之支持8-bit,16-bit和灰度bmp）源码注释详细，其中对BMP文件BMPHEADINFO的处理比较有趣。
new.cpp---->主要的程序代码
*.h----->一个产生U(0,1)随机数的发生器，相合度较小，DES函数产生。-Standard C++/C handle BMP images, do not use the VC in the category and any BITMAP not ANSI-C in the structure and function. K_means compression algorithm used to deal with 24bit (you can change the source code to support the 8-bit ,16-bit and grayscale bmp) detailed source notes, in which the handling of BMP files BMPHEADINFO more interesting. new.cpp----> the main program code*. h-----> generate a U (0,1) random number generator, a smaller degree of consistency, DES Function Generator. Platform: |
Size: 4096 |
Author:Yifan Young |
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Description: 灰度图像的jpeg压缩处理，解压处理，以及信噪比SNR的计算-Grayscale jpeg image compression, decompression, as well as the calculation of signal to noise ratio SNR Platform: |
Size: 17408 |
Author:华斌 |
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Description: The following implementation steps have been made for the devised algorithm, which is based on 2D-wavelet.
1. Reading an image of either gray scale or RGB image.
2. Converting the image into grayscale if the image is RGB.
3. Decomposition of images using wavelets for the level N.
4. Selecting and assigning a wavelet for compression.
5. Generating threshold coefficients using Birge-Massart strategy.
6. Performing the image compression using wavelets.
7. Computing and displaying the results such as compressed image, retained energy and Zero coefficients.
8. Decompression the image based on the wavelet decomposition structure.
9. Plotting the reconstructed image.
10. Computing and displaying the size of original image, compressed image and decompressed image. Platform: |
Size: 1024 |
Author:fer |
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Description: 基于DCT变换的图像压缩，分别给出了灰度图和真彩图的压缩方法。-DCT-based image compression, respectively, are given grayscale and true color pictures of the compression method. Platform: |
Size: 1024 |
Author:秦关 |
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Description: 基于奇异值分解的图像压缩。分别给出了灰度及RGB真彩图的压缩代码。
-Based on singular value decomposition of the image compression. Are given respectively grayscale and RGB true color pictures of the compression code. Platform: |
Size: 1024 |
Author:秦关 |
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Description: 基于高斯滤波器的图像压缩算法。可以处理真彩图和灰度图，相当实用。-Gaussian filter based on image compression algorithms. Can handle true color pictures and grayscale, quite useful. Platform: |
Size: 2048 |
Author:秦关 |
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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: 给予matlab的JPEG压缩程序，包含原始压缩图片，程序对灰度bmp图片进行JEPG编码，压缩成以0101形式的编码。JPEG编码先把图象色彩RBG变成亮度Y和色度Cr、Cb，它利用人的视觉对色度不敏感的特点，减少一部分色度数据，以达到压缩。 JPEG采取多种编码方式，包含有行程编码(Run Length Coding)和哈夫曼(Huffman)编码，有很高的压缩比。在编码前，先对数据进行分块，离散余弦变换（DCT）及量化，保留能量大的低频信号，丢弃高频信号以达到压缩。-Given to the JPEG compression matlab program, contains the original compressed image, the program of the grayscale bmp picture JEPG encoded, compressed into a 0101 form of encoding. RBG color coded JPEG image into a first luminance Y and chrominance Cr, Cb, which uses the human visual characteristics is not sensitive to the color, reduce the number of color data to achieve compression. Take a variety of JPEG encoding, includes length coding (Run Length Coding) and Huffman (Huffman) coding, a high compression ratio. In the code before the data block, discrete cosine transform (DCT) and quantization, to retain a large low-frequency signal energy, discarding high-frequency signals in order to achieve compression. Platform: |
Size: 175104 |
Author: |
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Description: the source code used for image compression using wavelet transform. to use this codes u have to first convert RGB image to grayscale and also its colourmap Platform: |
Size: 1024 |
Author:santosh |
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Search - grayscale compression