 Optimised grab method of images for the manipulation of virtual objectsBrahim Nini International Journal of Networking and Virtual Organisations, 2013, vol. 12, issue 2, 111-121 Abstract: This paper describes a new method in IBR context of photographing and storing images of real objects. It is a movie-based solution aiming at simulating object's manipulation. The solution uses a specific linear structure to store the frames corresponding to different viewing directions of an object through a virtual sphere. This method is an optimisation of a previous one (Nini and Batouche, 2007). Its main advantage is that it reduces considerably the number of images without any loss in the rendering quality. The main idea is based on the proportion that links the perimeters of the horizontal planes resulting from the split of the virtual sphere to the one of its centre. Such proportion is used to estimate the step angle specific to each level which defines the positions that the real camera takes for the grab operation. A simulated movement is then equivalent to orbiting a virtual camera around the object and projecting grabbed images. Based on the suggested method, a new algorithm is proposed for the images' retrieval process. Keywords: object manipulation; real cameras; virtual cameras; grab operation; virtual objects; 3D geometry; image retrieval; simulation; rendering quality; virtual spheres; object images. (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:ids:ijnvor:v:12:y:2013:i:2:p:111-121 Access Statistics for this article More articles in International Journal of Networking and Virtual Organisations from Inderscience Enterprises Ltd |
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