title: Effects of Spatial Resolution on Image Registration.
abstract: This paper presents a theoretical analysis of the effect of spatial resolution on image registration. Based on the assumption of additive Gaussian noise on the images, the mean and variance of the distribution of the sum of squared differences (SSD) were estimated. Using these estimates, we evaluate a distance between the SSD distributions of aligned images and non-aligned images. The experimental results show that by matching the resolutions of the moving and fixed images one can get a better image registration result. The results agree with our theoretical analysis of SSD, but also suggest that it may be valid for mutual information as well.
authors: Department of Electrical and Computer Engineering, The Johns Hopkins University.
authors: Can
authors: C
authors: Zhao
authors: Department of Electrical and Computer Engineering, The Johns Hopkins University; Department of Computer Science, The Johns Hopkins University.
authors: Aaron
authors: A
authors: Carass
authors: Department of Computer Science, The Johns Hopkins University.
authors: Amod
authors: A
authors: Jog
authors: Department of Electrical and Computer Engineering, The Johns Hopkins University; Department of Computer Science, The Johns Hopkins University.
authors: Jerry L
authors: JL
authors: Prince
keywords: Image registration; Resolution