April 2020
Intermediate to advanced
210 pages
4h 47m
Chinese
Content preview from 数据压缩入门
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160
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第
12
章
<feGaussianBlur result
=
"blurOut" in
=
"matrixOut"
stdDeviation
=
"10" />
<feBlend in
=
"SourceGraphic" in2
=
"blurOut" mode
=
"normal" />
</filter>
</defs>
<rect width
=
"90" height
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"90" stroke
=
"green" stroke-width
=
"3"
fill
=
"yellow" filter
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"url(#f1)" />
</svg>
图 12-9：由示例 SVG 文件生成的图形
12.6
收获的捷径
对现代应用程序来说，与用户进行交互的数据绝大多数是图像。运营方经常向用户发送的
是缩略图、新的图像、社交媒体推送、朋友的照片以及广告这些内容。用户则会经常上传
一些他们日常生活中的照片和内容。当你考虑减少应用程序的数据所占用的空间时，图像
应该是你最先关注的。可以说，这是最容易实现的目标，而且常常是小的改变就能带来大
的收获。
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