\backcite {huttenlocher93comparing}{{2}{1}{section.1}} \backcite {zhao,ldmap}{{2}{1}{section.1}} \backcite {morain}{{2}{1}{section.1}} \backcite {arch1,arch2}{{2}{1}{section.1}} \backcite {smooth}{{3}{2}{section.2}} \backcite {contrast}{{3}{2}{section.2}} \backcite {canny}{{3}{2}{section.2}} \backcite {canny}{{3}{2}{section.2}} \backcite {huttenlocher93comparing}{{3}{2}{figure.1}} \backcite {arch1,arch2}{{3}{2}{equation.2}} \backcite {ldmap}{{3}{2}{equation.2}} \backcite {ldmap}{{4}{2}{rem.1}} \backcite {zhao}{{4}{2}{rem.1}} \backcite {Rousseu}{{4}{2}{equation.5}} \backcite {deform}{{4}{3}{figure.3}} \backcite {brainweb,brainweb2}{{6}{4}{section.4}} \backcite {arch1,arch2}{{8}{4.1}{figure.6}}