Efficient Subpixel Refinement with Symbolic Linear Predictors (with Vincent Lui, Jonathon Geeves and Winston Yii)

This paper introduces a method for very rapid sub-pixel refinement of correspondences.  The method precomputes an update matrix that applies to the pixel intensity errors.  The update matrix is itself computed from a quadratic and linear form of the pixels in the image patch.  Finally the method also enables an estimation of the precision that will be obtained from a given reference patch.

[CVPR 2018 paper]