跟着opencv的license：3-clause BSD License，因爲opencv是以靜態鏈接ipp的
官方blog有提到：
https://opencv.org/opencv-3-0-alpha/
Intel corporation gave us another exciting present. A subset of Intel Integrated Performance Primitives (IPP) is linked by default into OpenCV and is available at no charge for all our users. And that includes the license to redistribute applications that use IPP-accelerated OpenCV. As you may see, for quite a few image processing functions we achieved very noticeable speedup with IPP