以下为期刊原要求：

Figure Permissions: If the figure is derived from a previously published image, the author must obtain permission from the original copyright holder, who may be the publisher and/or the author. Once permission is granted, the figure caption should include the line “Reproduced with permission, courtesy of [copyright owner],” or the publisher’s required copyright statement. Many permissions can be obtained via the Copyright Clearance CenterLeaving site

写正规论文的时候版权意识是必不可少的一步。但是相关资料好少啊，耽搁我不少时间。

我找到的一些有用的资料：https://jingyan.baidu.com/article/e5c39bf5c43fc439d76033cb.html

还是知乎给力一点：https://www.zhihu.com/search?q=%E8%AE%BA%E6%96%87%E5%BC%95%E7%94%A8%E5%88%AB%E4%BA%BA%E7%9A%84%E5%9B%BE%E7%89%87%20%E6%B3%A8%E6%98%8E%E7%89%88%E6%9D%83&utm_content=search_history&type=content

但是我最后用的方法和他们不一样，可能是现在引用比较简单了吧，所以记录一下。

看见右下角哪个 C 符号了吗？这就是目的地了。点它！

然后弹出小窗口，然后提示你选择一项用途（你引用来干啥？），这个按照自己的情况来选，写论文就选 thesis, 然后就有相应结论出来：一般都不需要付费。

然后就是这个页面了，意思就是，免费给你用，但是你要注明出处。

注明出处：Once permission is granted, the figure caption should include the line “Reproduced with permission, courtesy of [copyright owner],” or the publisher’s required copyright statement. 但是这个IEEE期刊也有要求啊，所以我折中了一下，写了下面这个：

Reproduced with permission of Ref. 所引文献, Copyright of C 所引年份 期刊名称.