Patent ID: 7109989
Filing Date: 2006-09-19
Classification: G06T

Abstract:
1. A computer-implemented method of generating a two-dimensional image of a volume data set representing an object volume from a selectable viewpoint, the method comprising: providing, in storage, an object volume data set comprising voxel values ordered by voxels along a row that extends in a first direction, rows across a plane that extends in the first direction and a second direction, and planes through an object volume that extends in the first and second directions and a third direction, whereby the voxel values for voxels in the first direction are stored sequentially in storage; in response to definition of a view vector defining a view direction with respect to a viewpoint, determining shear and warp mappings and determining one of the first, second and third directions as being closest to the view vector; deriving pixels of a two-dimensional sheared image having a plurality of lines of pixels from voxel values of the object volume data set identified by the shear mapping, wherein, irrespective of which direction is closest to the view vector, the shear mapping maps rows of voxels in the first direction onto lines of pixels of the sheared image; and deriving an output image by mapping pixels of the sheared image according to the warp mapping.