| Patent Number |
Title Of Patent |
Date Issued |
| 6057855 |
Method and apparatus for providing polygon pixel sub-sample information using incremental means |
May 2, 2000 |
| A method and apparatus for generating a mask identifying a number of subpixels that are covered by a primitive includes the process of apportioning an image, comprising a plurality of scan lines into a plurality of sub-scan lines, such that a number of sub-scan lines crosses each pix |
| 5929862 |
Antialiasing system and method that minimize memory requirements and memory accesses by storing |
July 27, 1999 |
| An antialiasing system is implemented in a graphics system of a computer. A memory control is associated with graphics system for controlling a frame buffer. The antialiasing system is situated in the memory control and is configured to receive from steppers (edge and span) new color val |
| 5905504 |
System and method for dithering and quantizing image data to optimize visual quality of a color |
May 18, 1999 |
| A color graphics pipeline has a separate encoder with a dither table for processing each color value in pixel data received from a host processor or rasterizer. The encoders modify color values and dither noise values and also combine both positive and negative dither noise values with t |
| 5649083 |
System and method for dithering and quantizing image data to optimize visual quality of a color |
July 15, 1997 |
| A color graphics pipeline has a separate encoder with a dither table for processing each color value in pixel data received from a host processor or rasterizer. The encoders modify color values and dither noise values and also combine both positive and negative dither noise values with t |
| 5598184 |
Method and apparatus for improved color recovery in a computer graphics system |
January 28, 1997 |
| Color information lost in a computer graphics system as a result of encoding by dithering is recovered by passing the encoded data through a filter that has the same effective shape and size as the dither matrix used to encode the data. In a system that employs a dither matrix having |
| 5519823 |
Apparatus for rendering antialiased vectors |
May 21, 1996 |
| A color/texture interpolator (CTI) for use in rendering antialiased vectors in a computer graphics system comprises: an x-stepper circuit for receiving input data defining a vector to be rendered and generating respective pixel addresses of pixels composing the vector; a filter memory |
| 5519822 |
Method and apparatus for simultaneously selecting a plurality of pixels to lie upon a line segme |
May 21, 1996 |
| First next and second next pixel locations are selected simultaneously from among adjacent pixel locations and represent a straight line segment defined by two end locations and having a slope of one or less. An initialization process uses the .DELTA.X and .DELTA.Y of the desired line |
| 5428810 |
Allocation of resources of a pipelined processor by clock phase for parallel execution of depend |
June 27, 1995 |
| A technique of processing pipeline commands in parallel so as to minimize pipeline stalls. This is accomplished in accordance with the invention without need for the complex resource allocation techniques of the prior art by arbitrating access to critical pipeline resources on the phase |
| 5220650 |
High speed method for rendering antialiased vectors |
June 15, 1993 |
| A scan conversion algorithm for rendering antialiased vectors in a multi-processor graphics system comprises the following steps: providing signals to the processors indicative of scan lines the respective processors are responsible for, determining a first set of storage pixels to b |
| 4988985 |
Method and apparatus for a self-clearing copy mode in a frame-buffer memory |
January 29, 1991 |
| A three-dimensional frame-buffer memory organized into a series of planes each storing one bit representative of a pixel on the display can draw a figure onto one of the planes. The figure can then be copied to preselected ones of the other planes while the first plane is cleared. A |
| 4888712 |
Guardband clipping method and apparatus for 3-D graphics display system |
December 19, 1989 |
| A system for clipping polygons representing three-dimensional objects to produce a representation of the portion of the objects in a desired viewing space is disclosed. A guardband space at least partially enclosing the viewing space is defined. The polygons are compared to the guardband |
| 4876533 |
Method and apparatus for removing an image from a window of a display |
October 24, 1989 |
| An image within a window on a scanned display device driven by a video generator is replaced with a preselected background color within one frame. The contents of the memory used to refresh the display can thus be changed in a background mode so that the user is unaware of the operation |
