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Hi,<autoscroll_cursor style="position: fixed !important; z-index: 2147483647 !important; left: 0px !important; top: 0px !important; width: 100% !important; height: 100% !important; background-color: transparent !important; background-attachment: fixed !important; background-image: url(chrome-extension://occjjkgifpmdgodlplnacmkejpdionan/icons/scroll/scroll-vertical.png) !important; display: none !important; cursor: auto !important; background-repeat: no-repeat no-repeat !important; "></autoscroll_cursor><div>I make use of the FEM based deformable registration in ITK in a task as simple as in the DeformableRegistration1.cxx in ITK Examples. The algorithm works fine however I need detailed information on the algorithm, is there an academic paper or reference in which this algorithm is described? What is the energy function it minimizes for instance? I looked a lot into the manual / tutorials but found no information on that. The book on ITK has details about some concepts, but it is unclear which of the algorithms it describes is this one. I would really appreciate some help, thanks.</div><div>Cagdas Bilen</div>                                            </body>
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