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 |
Hits:
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 |
Hits:
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 |
Hits:
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 |
Hits:
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 |
Hits:
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 |
Hits:
Description: 本程序包含常用的图像灰度化处理，锐化，滤波，压缩等常用的数字图像处理程序。都仔细调试过，无误。-This program contains commonly used image processing grayscale, sharpening, filtering, compression and other common digital image processing program. Are carefully debugged, and correct. Platform: |
Size: 1192960 |
Author:谢坤 |
Hits:
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: |
Hits:
Description: 利用DCT变换对灰度图像进行压缩，求出压缩比；对比不同压缩比的图像。-DCT transform using grayscale image compression, the compression ratio obtained compare different compression ratio of the image. Platform: |
Size: 1028096 |
Author:吴原远 |
Hits:
Description: 使用Matlab编程实现发送端信源编码（图像压缩）和接收端信源解码（图像重建），其中的编解码算法可采用基于DCT变换的JPEG图像压缩标准；测试图像加噪，然后对去噪后的图像进行压缩与重建，分析压缩性能；研究基于下采样和内插的图像压缩算法；可将8bit/pixel灰度图像扩展至24bit/pixel彩色图像，或者采用无损压缩算法对图像压缩。-Sender using the Matlab programming source coding (image compression) and the receiver source decoding (image reconstruction), one of the decoding algorithm can be used DCT-based JPEG image compression standard test image with noise, then the denoised image compression and reconstruction, compression performance analysis of down-sampling and interpolation based on image compression algorithm 8bit/pixel grayscale images can be extended to 24bit/pixel color images, or the use of lossless compression algorithms for image compression.
Platform: |
Size: 32768 |
Author:耿智能 |
Hits:
Description: 用matlab模拟实现的灰度图的类JPEG的压缩解压过程，其中含有各函数的说明txt-Using matlab simulation class grayscale JPEG compression decompression process, which contains a description of each function txt Platform: |
Size: 220160 |
Author:萧奇 |
Hits:
Description: 可以完成灰度图像的算术编码和解码,来完成二维图像在matlab中的压缩处理-You can complete the grayscale image arithmetic encoding and decoding, to complete the two-dimensional image compression processing in matlab Platform: |
Size: 1024 |
Author:任佩 |
Hits:
Description: 实现了图像的灰度化并进一步用于视频监视控，用MATLAB实现动态聚类或迭代自组织数据分析，包括压缩比、运行时间和计算复原图像的峰值信噪比。- Achieve a grayscale image and further control for video surveillance, Using MATLAB dynamic clustering or iterative self-organizing data analysis, Including compression ratio, image restoration computing uptime and peak signal to noise ratio. Platform: |
Size: 5120 |
Author:梁鸣 |
Hits:
Description: LFM pulse compression of the Matlab program, Including the final calculation of the compressed image peak signal to noise ratio and compression of the source, Achieve a grayscale image and further control for video surveillance. Platform: |
Size: 6144 |
Author:quipangang
|
Hits:
Search - grayscale compression matlab