commit d4de51ccdf49b00df673333f7dd509728827dec7
Author: lice <1981220267@qq.com>
Date:   Thu Jan 18 12:33:30 2018 +0800

    Create README.md

diff --git a/README.md b/README.md
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+用到canvas中的`getImageData` `putImageData`处理图片<br>
+以及html5中的 `FileReader` 接口实现预览