Birchfield–Tomasi dissimilarity
In computer vision, the Birchfield–Tomasi dissimilarity is a pixelwise image dissimilarity measure that is robust with respect to sampling effects. In the comparison of two image elements, it fits the intensity of one pixel to the linearly interpolated intensity around a corresponding pixel on the other image.
Source: Wikipedia — Birchfield–Tomasi dissimilarity (CC BY-SA 4.0)