I am doing some object detection using features2d (ORB, SIFT etc)
I am investigating further into homography with RANSAC. I found out that many good points are marked wrongly as outliers.
For example take this pic, the red circles shows outliers marked by ransac (thresold default at 3)
As you can see there are lots of outliers that shouldn't be outliers inside the object (the book)
I have tried to rise threshold up to 10 but the result is pretty the same. Can I do something to improve this situation?
Is there something broke with RANSAC ?