Symposium on Application Acceleration in High Performance Computing
Given multiple images of the same scene, image registration is the process of determining the correct transformation to bring the images into a common coordinate system—i.e., how the images fit together. Feature based registration applies a transformation function to the input images before performing the correlation step. The result of that transformation, also called feature extraction, is a list of significant points in the images, and the registration process will attempt to correlate these points, rather than directly comparing the input images.
Apon, Amy; Warn, Seth; Emeneker, Wesley; Gauch, John; and Cothren, Jackson, "Accelerating Image Feature Comparisons using CUDA on Commodity Hardware" (2010). Publications. 25.