21 March 2016 Effects of spatial resolution on image registration
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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.
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Can Zhao, Can Zhao, Aaron Carass, Aaron Carass, Amod Jog, Amod Jog, Jerry L. Prince, Jerry L. Prince, } "Effects of spatial resolution on image registration", Proc. SPIE 9784, Medical Imaging 2016: Image Processing, 97840Y (21 March 2016); doi: 10.1117/12.2217322; https://doi.org/10.1117/12.2217322


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