US 7,002,589 B2 · Blending the edges of multiple overlapping screen images

Abstract

A graphics system comprises pixel calculation units and a sample buffer which stores a two-dimensional field of samples. Each pixel calculation unit selects positions in the two-dimensional field at which pixel values (e.g. red, green, blue) are computed. The pixel computation positions are selected to compensate for image distortions introduced by a display device and/or display surface. Non-uniformities in a viewer's perceived intensity distribution from a display surface (e.g. hot spots, overlap brightness) are corrected by appropriately scaling pixel values prior to transmission to display devices. Two or more sets of pixel calculation units driving two or more display devices adjust their respective pixel computation centers to align the edges of two or more displayed images. Physical barriers prevent light spillage at the interface between any two of the display images. Separate pixel computation positions may be used for distinct colors to compensate for color distortions.

Claims26

Dependent claims

A graphics system for flattening a distribution of light energy perceived by a viewer of two or more images generated on a display surface by two or more corresponding projection devices, the graphics system comprising:

a first sample-to-pixel calculation unit configured to compute first pixel values by selecting and filtering samples, to scale color intensity values of each pixel of a first subset of the first pixel values by specified corresponding first intensity scaling values, and to provide the first pixel values, including the first subset, to a first projection device;
and
a second sample-to-pixel calculation unit configured to compute second pixel values by selecting and filtering the samples, to scale color intensity values of each pixel of a second subset of the second pixel values by specified corresponding second intensity scaling values, and to provide the second pixel values, including the second subset, to a second projection device;
wherein the color intensity values of the first and second subsets of pixel values are scaled to flatten a distribution of light energy perceived by a viewer of combined images generated on a display surface by the first and second projection devices.

1 more element

A graphics system for performing edge blending of two or more images generated on a display surface by two or more corresponding projection devices, the graphics system comprising:

a graphics processor configured to receive graphics data and to render samples in response to the received graphics data;
a sample buffer coupled to the graphics processor and configured to store the samples;
a first sample-to-pixel calculation unit coupled to the sample buffer and configured to compute first pixel values by filtering the samples at a first plurality of first virtual pixel positions, to scale color intensity values of each pixel of a first subset of the first pixel values by specified corresponding first intensity scaling values, and to provide the first pixel values, including the first subset, to a first projection device;
and
a second sample-to-pixel calculation unit coupled to the sample buffer and configured to compute second pixel values by filtering the samples at a second plurality of second virtual pixel positions, to scale color intensity values of each pixel of a second subset of the second pixel values by specified corresponding second intensity scaling values, and to provide the second pixel values, including the second subset, to a second projection device;
wherein the color intensity values of the first and second subsets of pixel values are scaled to flatten a distribution of light energy perceived by a viewer of combined images generated on a display surface by the first and second projection devices.

3 more elements

Dependencies are inferred from the claim text.

Blending the edges of multiple overlapping screen images

Life of this patent

Blending the edges of multiple overlapping screen images

Life of this patent

Abstract

Claims26