eng URI http://hdl.handle.net/10795/3639 εικόνα σύνθεσης There are many different three-dimensional (3D) techniques to capture and deliver autostereoscopic 3D content. A promising technique that provides two-dimensional parallax as well as high-quality, full-color 3D content is integral imaging (InI). Misalignments between the lens arrays (LAs) and the camera charged coupled device, however, introduce geometric distortions in the acquired image that propagate through the different image processing stages and deteriorate the 3D effect. Here, we propose a method to accurately rectify the perspective distortion of integral images (InIms) generated using circular lenses. Using an edge-linking approach, we extracted elliptically shaped contours of elemental images in the perspectively distorted InIm. To calculate the rectification matrix, we used the images of the circular points. Subsequently, we applied a triangulation scheme followed by a statistical approach to accurately estimate the grid structure of the LA. Finally, we provided experimental results over a wide range of InIms to evaluate the robustness and accuracy of the proposed method using objective metrics. 10 pp. LOMv1.0 creator LOMv1.0 publisher LOMv1.0 Scientific Coordinator LOMv1.0 Project Executing Organisation 2013-07-09 Digital Library of the Operational Programme "Education and Lifelong Learning" abstract types Text Integral images Circular lenses Arrays Frameworks https://www.osapublishing.org/ao/abstract.cfm?uri=ao-52-20-4959 1214996 application/pdf http://repository.edulll.gr/edulll/bitstream/10795/3639/2/3639_1.12_%ce%94%ce%97%ce%9c_2013.pdf URI http://hdl.handle.net/10795/3639 LOMv1.0creator 2016-06-14T13:16:05Z LOMv1.0validator 2016-06-14T13:16:05Z LOMv1.0 gre no no Copyright EYD-EPEDBM (Operational Programme "Education and Lifelong Learning")