<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>LASSO on Chen Kai Blog</title><link>https://www.chenk.top/zh/tags/lasso/</link><description>Recent content in LASSO on Chen Kai Blog</description><generator>Hugo</generator><language>zh-CN</language><lastBuildDate>Wed, 19 Mar 2025 09:00:00 +0000</lastBuildDate><atom:link href="https://www.chenk.top/zh/tags/lasso/index.xml" rel="self" type="application/rss+xml"/><item><title>线性代数（十二）：稀疏矩阵与压缩感知——少即是多的数学奇迹</title><link>https://www.chenk.top/zh/linear-algebra/12-%E7%A8%80%E7%96%8F%E7%9F%A9%E9%98%B5%E4%B8%8E%E5%8E%8B%E7%BC%A9%E6%84%9F%E7%9F%A5/</link><pubDate>Wed, 19 Mar 2025 09:00:00 +0000</pubDate><guid>https://www.chenk.top/zh/linear-algebra/12-%E7%A8%80%E7%96%8F%E7%9F%A9%E9%98%B5%E4%B8%8E%E5%8E%8B%E7%BC%A9%E6%84%9F%E7%9F%A5/</guid><description>&lt;h2 id="少即是多的奇迹" class="heading-anchor">「少即是多」的奇迹&lt;a href="#%e5%b0%91%e5%8d%b3%e6%98%af%e5%a4%9a%e7%9a%84%e5%a5%87%e8%bf%b9" class="heading-link" aria-label="Permalink to this section" title="Copy link to this section">#&lt;/a>
&lt;/h2>&lt;p>一张 2400 万像素的原始照片，大小约为 70 MB；用 JPEG 压缩后，只有几百 KB，压缩比高达 100 倍，但你看不出区别。传统 MRI 扫描需要 30 分钟，而现代压缩感知 MRI 只需 5 分钟，图像质量完全一样。&lt;/p></description></item></channel></rss>