The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2005
Filed:
Feb. 07, 2002
Johannes Bruijns, Eindhoven, NL;
Johannes Bruijns, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a method for rendering of a volume data set on a two dimensional display. According to the method of the invention gradient vectors of voxel values are computed and are replaced by an index into a gradient look up table, thereby reducing the amount of required memory as well as the number of memory accesses during rendering. For each point on a two-dimensional view plane a ray is cast into the volume. Then the volume data is sampled at discrete sample points along each individual ray. During rendering eight gradient vectors of the neighboring voxels at each sample location are retrieved from the look up table. The invention proposes to apply dithering to the gradients before selecting the appropriate index. Recovery of the true gradient value is achieved because of the interpolation. Thus image artifacts, such as intensity bands caused by the discretization of the gradients, are avoided.
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