title: A novel approach for image alignment using a Markov-Gibbs appearance model.
abstract: A new approach to align an image of a medical object with a given prototype is proposed. Visual appearance of the images, after equalizing their signals, is modelled with a new Markov-Gibbs random field with pairwise interaction model. Similarity to the prototype is measured by a Gibbs energy of signal co-occurrences in a characteristic subset of pixel pairs derived automatically from the prototype. An object is aligned by an affine transformation maximizing the similarity by using an automatic initialization followed by gradient search. Experiments confirm that our approach aligns complex objects better than popular conventional algorithms.
authors.affiliation: Computer Vision and Image Processing Laboratory University of Louisville, Louisville, KY 40292, USA. elbaz@cvip.Louisville.edu
authors.forename: Ayman
authors.initials: A
authors.lastname: El-Baz
authors.forename: Asem
authors.initials: A
authors.lastname: Ali
authors.forename: Aly A
authors.initials: AA
authors.lastname: Farag
authors.forename: Georgy
authors.initials: G
authors.lastname: Gimel'farb
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D003198:Computer Simulation; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007668:Kidney / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008390:Markov Chains; D008954:Models, Biological; D015233:Models, Statistical; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D014057:Tomography, X-Ray Computed / Q000379:methods*