1.OpenCV 3.0 or later (for IO and ORB features, necessary)

2.cudafeatures2d module(for gpu nearest neighbor, optional)

Image pair demo in demo.cpp.

In demo.cpp
	1.#define USE_GPU" will need gpu cudafeatures2d module for nearest neighbor match, 
		using cpu match by commenting it.

In gms_matcher.h
			
	2.	#define THRESH_FACTOR 6			// factor for calculating threshold
			The higher, the less matches, vice verse
			
	3. 	int GetInlierMask(vector<bool> &vbInliers, bool WithScale = false, bool WithRotation = false)
			You can open multi-scale and rotation if your image pair contains that. 

@article{bian2017gms,
	title={GMS: Grid-based Motion Statistics for Fast, Ultra-robust Feature Correspondence},
	author={JiaWang Bian and Wen-Yan Lin and Yasuyuki Matsushita and Sai-Kit Yeung and Tan Dat Nguyen and Ming-Ming Cheng},
	booktitle={Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition},
	year={2017}
}