如今SIFT算法在深度学习特征提取与分类检测网络大行其道的背景下，已经越来越有鸡肋的感觉，但是它本身的算法知识还是很值得我们学习，对我们也有很多有益的启示，本质上SIFT算法是很多常见算法的组合与巧妙衔接，这个思路对我们自己处理问题可以带来很多有益的帮助。

OpenCV4.4版本以后已经把SIFT跟SURF特征提取又重新get回来了，可以不需要编译OpenCV源码，直接下载官方预编译版本的就可以直接使用了。 但是很多人还以为必须要编译源码才能使用SIFT特征检测的函数！ 如果还不知道SIFT特征是什么，就看这里的这篇文章就好啦。

网络安全科技公司Sift Science在由Stripes Group牵头的D轮中融资5300万美元，Union Square Ventures、Insight Venture Partners和Spark Capital等老东家继续跟投。 至此 ...

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