Enhanced compression of integral images by combined use of residual images and MPEG-4 algorithm in three-dimensional integral imaging |
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Authors: | Cheol-Hwa Yoo Eun-Soo Kim |
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Institution: | 3D Display Research Center, Dept. of Electronic Eng., Kwangwoon University, 447-1 Wolge-Dong, Nowon-Gu, Seoul 139-701, Republic of Korea |
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Abstract: | In this paper, we proposed a novel approach to enhance the compression rate of integral images by combined use of the residual images generated from the sub-images and the MPEG-4 algorithm. In the proposed method, elemental images picked up from a three-dimensional object are transformed into sub-images, and these sub-images are sequentially rearranged with a spiral scanning topology and the first sub-image is assigned as the reference image. Then, by sequentially computing the differences between the reference image and other consecutive sub-images, a sequence of residual images is generated. Here, the residual images together with the reference image are modeled as the consecutive video frames just like a conventional moving picture. Finally, these residual images are compressed with the MPEG-4 algorithm. Experimental results show that compression efficiency of the proposed method has been improved up to 61.56% as compared to those of the JPEG-based compression scheme and up to 151.54% as compared to those of the conventional method averagely. |
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Keywords: | Integral imaging Compression Elemental images Sub-images Residual images MPEG-4 |
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