Rebinning methods and arrangements for use in compressing image-based rendering (IBR) data
First Claim
1. A method comprising:
- selectively aligning at least two image based rendering (IBR) image data along a specific direction;
selectively rebinning the aligned IBR image data to form a multi-perspective panorama that includes an arbitrary region of support, wherein the rebinning includes subdividing each of the IBR image data into a plurality of portions and combining a specific portion selected from each IBR image data to form a portion of the multi-perspective panorama;
determining at least one displacement vector associated with the at least two IBR image data and subdividing at least one of the IBR image data based on the magnitude of the displacement vector; and
setting the displacement vector for each of the at least two IBR image data to be of different magnitude to support a smart rebinning process for a data volume that includes the arbitrary region of support and an unsupported region of the multi-perspective panorama.
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Abstract
Rebinning methods and arrangements are provided that significantly improve the 3D wavelet compression performance of the image based rendering data, such as, e.g., concentric mosaic image data. Through what is essentially a selective cutting and pasting process the image data is divided into stripes that are then used to form a set of multi-perspective panoramas. The rebinning process greatly improves the performance of the cross shot filtering, and thus improves the transform and coding efficiency of 3D wavelet codecs. While the region of support after rebinning may cease to be rectangular in some cases, a padding scheme and an arbitrary shape wavelet coder can be implemented to encode the result data volume of the smart rebinning. With an arbitrary shape wavelet codec, the rebinning outperforms MPEG-2 by 3.7 dB, outperforms direct 3D wavelet coder by 4.3 dB, and outperforms a reference block coder (RBC) by 3.2 dB on certain tested concentric mosaic image scenes. Hence, the rebinning process nearly quadruples the compression ratio for selected scenes. Additional methods and arrangements are provided that include selectively dividing the image data into slits and rebinning the slits into a huge 2D array, which is then compressed using conventional still image codecs, such as, JPEG.
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Citations
5 Claims
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1. A method comprising:
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selectively aligning at least two image based rendering (IBR) image data along a specific direction; selectively rebinning the aligned IBR image data to form a multi-perspective panorama that includes an arbitrary region of support, wherein the rebinning includes subdividing each of the IBR image data into a plurality of portions and combining a specific portion selected from each IBR image data to form a portion of the multi-perspective panorama; determining at least one displacement vector associated with the at least two IBR image data and subdividing at least one of the IBR image data based on the magnitude of the displacement vector; and setting the displacement vector for each of the at least two IBR image data to be of different magnitude to support a smart rebinning process for a data volume that includes the arbitrary region of support and an unsupported region of the multi-perspective panorama. - View Dependent Claims (2, 3, 4, 5)
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Specification