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S. Horbelt, M. Liebling, and M. Unser, FIGURE 3 ? Reconstructions d'un fantôme de Shepp-Logan 128 × 128 (axes en pixels), ` a partir de sinogrammes calculés analytiquement en géométrieparalì ele, pour 200 pixels sur le détecteur et 60 angles de projection espacésrégulì erement sur un intervalle de 180?(180?(axes en pixels détecteur + numéro d'angle croissant) (a) : image originale. (b) : meilleur résultat qualitatif avec le projecteur B-spline utilisant des B-splines cubiques. (c) : meilleur résultat qualitatif avec le projecteur distance driven. (d) : reconstruction distance driven avec une erreur résiduelle par rapport aux sinogrammes initiaux (erreur quadratique moyenne de l'image reprojetée par rapport aux vrais sinogrammes) identiquè a la reconstruction avec le modèle B-spline (b). (e) : profils des reconstructions (ligne rouge sur l'image (a)), en rouge : (b) -en bleu : (c) -en vert : (d). (f) : profils des reconstructions (ligne bleue sur l'image (a)) ; même légende couleur que le graphe (e), 2002.

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