This paper presents a methodology for determining the spacial location and orientation of a multi-viewpoint image set (MVIS) in relation to an absolute coordinate system for their projection on a new autostereoscopic display based on the angular image differentiation system patented by Montes. The different points of view from which a real scene is acquired are most of the time completely unknown a priori. To determine such camera locations and orientations, two algorithms based on photogrammetric techniques are applied. The first one named `Numerical plotting of a photo pair' consists on the calculation of the relative orientation of two different photographs of the scene. The second algorithm named `Resection in space' takes into account the projection of the 3D points onto the rest of the photographs to determine their absolute location and orientation. Once the absolute location and orientation of each of the images of the MVIS is known, a perspective correction is needed before its projection. This is done so because the image perspective deformations can introduce visual distortions that could be appreciated by an observer. For this purpose, a backward warping transformation is applied to each image depending on the positions of both the acquisition coordinate system, calculated through the previously mentioned algorithms, and the reproduction coordinate system.
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