1 | initial version |
The reason you got that error is that for android OpenCV, nonfree module is not included. So, you need to build nonfree module by yourself.
There is an easy way to do that without rebuilding the whole OpenCV source code for android. you can refer to this tutorial: https://sites.google.com/site/wghsite/technical-notes/sift_surf_opencv_android
Hope this will help.