Graphics system configured to filter samples using a variable support filter
Patent 6577312 Issued on June 10, 2003. Estimated Expiration Date: 
January 4, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 4, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFilter RAMDAC with hardware 11/2-D zoom function Horizontal filter in moving picture decoding apparatus Texture mapping with improved technique for selecting an appropriate level in filtered representations of the texture 6268864 Methods and apparatuses for selecting levels of detail for objects having multi-resolution models in graphics displays Multi-resolution geometry Patent #: 6421051 InventorsApplicationNo. 755643 filed on 01/04/2001US Classes:345/428, Adjusting level of detail345/581Attributes (surface detail or characteristic, display attributes)ExaminersPrimary: Vo, Cliff N.Foreign Patent References
International ClassG06T 017/00AbstractA computer graphics system may comprise a graphics processor, a sample buffer, and a sample-to-pixel calculation unit. The graphics processor renders samples into the sample buffer in response to received graphics data. The sample-to-pixel calculation unit generates a plurality of output pixels by filtering the rendered samples based on a filter function. The pixels may be computed by generating a weighted sum of sample values (e.g. red sample values) for samples falling within the filter support. The coefficients used in the weighted sum may be added to form a normalization factor. One weighted sum of sample values may be computed per pixel attribute such as red, green, blue and alpha. The normalization factor may be computed in parallel with one or more of the weighted sums. Normalized pixel values may be obtained by dividing the weighted-sums by the normalization factor.Other References
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