Image Similarity Based on Intensity Scaling

13 years 4 months ago

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An image similarity measure based upon intensity scaling is investigated for the registration of images which diﬀer in contast. The measure is introduced for both optical ﬂow and for ﬁnite displacements, and registration by the optical ﬂow formulation is found to be independent of image order. While other morphological image matching methods involve diﬀerential formulations, the present work simply involves composition with scaling functions. Such rescaling is additionally found to have a smoothing eﬀect on noisy images. Results obtained by Tikhonov regularization of scaling functions are superior to those obtained by a restricted set of basis functions. Computational results are performed for simple test cases as well as for realistic examples taken from magnetic resonance imaging. It is found that the computational cost for the implementation of scaling functions is very small, and yet the resulting image similarity can provide a match between images with smaller errors t...

Stephen L. Keeling

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