Lifting-based view compensated compression and remote visualization of volume rendered images
First Claim
Patent Images
1. A method for compressing 2D images, the method comprising:
- determining a depth map for each of a plurality of sequential 2D images of a 3D volumetric image, each depth map including a plurality of depths that correspond to points in the corresponding 2D image, each depth corresponding to a depth of a point in the 3D volumetric image that is representative of an intensity of the point in the 2D frame;
determining coordinate transformations between the 2D images based on the depth maps and a geometric relationship between the 3D volumetric image and each of the 2D images;
performing a lifting-based view compensated wavelet transform on the 2D images using the coordinate transformations to generate a plurality of wavelet coefficients; and
compressing the wavelet coefficients and depth maps to generate a compressed representation of the 2D images.
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Abstract
A method for compressing 2D images includes determining a depth map for each of a plurality of sequential 2D images of a 3D volumetric image, determining coordinate transformations the 2D images based on the depth maps and a geometric relationship between the 3D volumetric image and each of the 2D image, performing a lifting-based view compensated wavelet transform on the 2D images using the coordinate transformations to generate a plurality of wavelet coefficients and compressing the wavelet coefficients and depth maps to generate a compressed representation of the 2D images.
188 Citations
20 Claims
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1. A method for compressing 2D images, the method comprising:
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determining a depth map for each of a plurality of sequential 2D images of a 3D volumetric image, each depth map including a plurality of depths that correspond to points in the corresponding 2D image, each depth corresponding to a depth of a point in the 3D volumetric image that is representative of an intensity of the point in the 2D frame; determining coordinate transformations between the 2D images based on the depth maps and a geometric relationship between the 3D volumetric image and each of the 2D images; performing a lifting-based view compensated wavelet transform on the 2D images using the coordinate transformations to generate a plurality of wavelet coefficients; and compressing the wavelet coefficients and depth maps to generate a compressed representation of the 2D images. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for performing remote visualization of an image, the system comprising:
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a network; a server workstation comprising; a depth map generation unit to determine a depth map for sequential 2D images of a 3D volumetric image; a mapping unit to determine coordinate transformations between the 2D images based on the depth maps and a geometric relationship between the 3D volumetric image and each of the 2D images; and a compressing unit to performing a lifting-based view compensated wavelet transform on the 2D images using the coordinate transformations to generate a plurality of wavelet coefficients and compress the wavelet coefficients and depth maps to generate a compressed representation of the 2D images; a client workstation to receive the compressed representation of the 2D images across the network and to restore the 2D images from the compressed representation; and a client display to display the restored 2D images. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable medium, tangibly embodying a program of instructions executable by the computer to perform method steps for compressing 2D images of a 3D volumetric image, the method comprising:
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rendering the 2D images from the 3D volumetric data using ray casting; determining a depth for each point of each 2D image based on a weighted sum of sample point depths in the 3D volumetric image, wherein each sample point is along a corresponding a ray cast by the ray casting; determining coordinate mappings between the 2D images based on the depths and a geometric relationship between the 3D volumetric image and the 2D images; performing a lifting-based view compensated wavelet transform on the 2D images using the coordinate mappings to generate a plurality of wavelet coefficients; and compressing the wavelet coefficients and depths to generate a compressed representation of the 2D images. - View Dependent Claims (20)
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Specification