文件名称:t4_4
- 所属分类:
- 图形图像处理(光照,映射..)
- 资源属性:
- [Matlab] [源码]
- 上传时间:
- 2013-11-01
- 文件大小:
- 1kb
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- 0次
- 提 供 者:
- 付**
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利用离散余弦变换函数(dct2和idct2)模拟JPEG压缩过程。 对“lena.bmp”做压缩,观察压缩效果。(JPEG压缩过程: 首先把原始的图像划分为8×8的子图像,然后利用dct2分别
对各个子图像进行离散余弦变换,对变换系数仅保留左上角15个值, 然后利用这15个系数进行离散余弦反变换重新得到各个子图像,再 将子图像拼接成完整图像) -Using discrete cosine transform function (dct2 and idct2) analog JPEG compression process. On " lena.bmp" do compression, the compression effect was observed. (JPEG compression process: First, the original image is divided into 88 sub-image, and then use dct2 of each sub-image, respectively, discrete cosine transform, the upper left corner of the transform coefficients to retain only 15 values, then use the 15 coefficients discrete cosine transform regain each sub-image, and then sub-images together into a complete picture)
对各个子图像进行离散余弦变换,对变换系数仅保留左上角15个值, 然后利用这15个系数进行离散余弦反变换重新得到各个子图像,再 将子图像拼接成完整图像) -Using discrete cosine transform function (dct2 and idct2) analog JPEG compression process. On " lena.bmp" do compression, the compression effect was observed. (JPEG compression process: First, the original image is divided into 88 sub-image, and then use dct2 of each sub-image, respectively, discrete cosine transform, the upper left corner of the transform coefficients to retain only 15 values, then use the 15 coefficients discrete cosine transform regain each sub-image, and then sub-images together into a complete picture)
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t4_4.m