Quantisation strategies for 3D-DCT-based compression of full parallax 3D images

A unique integral imaging system is employed as part of a three dimensional television system, allowing display of full colour 3D images with continuous parallax within a wide viewing zone. A significant quantity of data is required to represent captured integral 3D images with adequate resolution. A lossy compression scheme has been developed, based on the use of a three dimensional discrete cosine transform (3D-DCT), which makes possible efficient storage and transmission of such images while maintaining all information necessary to produce a high quality 3D display. In this paper we present the results of investigations into the design of quantisation strategies to maximise rate-distortion performance, including the use of image-orientated optimization. Performance is vastly improved compared with that achieved using baseline JPEG for compression of full parallax integral 3D image data