Hi all,
It was my understanding from previous posts (e.g., [here](http://answers.opencv.org/question/52001/how-to-compile-nonfree-module-in-opencv-30-beta/)) that algorithms that are potentially patented were included in nonfree module (till OpenCV 3.0) or a separate opencv_contrib repo (starting OpenCV 3.0). However, I just found out that the Haar cascade algorithm for face detection included in the objdetect module in OpenCV 3.0 is patented. So, a couple of questions:
1. Is Haar cascade object detection the only algorithm remaining in the main repo in OpenCV 3.0 that has patent issues? Or, do users need to check every algorithm in OpenCV 3.0 main repo for potential patent infringement?
2. I see [here](http://www.codeproject.com/Articles/441226/Haar-feature-Object-Detection-in-Csharp) that one may still use the face detection feature in OpenCV 3.0 without patent infringement. Is this accurate?
Thanks!
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