Sonic Solutions

Ati Technologies Ulc

Geoffrey Park

Jeffrey Gongxian Cheng

Daniel Wong

Kenneth Man

Catalin Beju

Iouri Kiselev

An efficient method of compositing planes onto a target surface using a computing device with graphics processing capability is disclosed. The method includes partitioning the target surface, on which planes are composited, into partitions. Each one of the partitions contains connected pixels to be formed by compositing an identical subset of the planes to be composited. Each partition is associated with a corresponding subset of the planes. Each partition and its corresponding set of associated planes are then provided to a graphics processor for composition, using exemplary software components including an application programming interface, a library and device driver software. An image is formed on the target surface by compositing each partition. Using the disclosed method, a single pass through stages of the graphics pipeline for the graphics processor is sufficient to composite multiple planes to form an image on the target surface.

System and method for efficient digital video composition

A method for chroma key masking is provided. The method includes adjusting a first parameter representing a size of a first ellipsoid in a color space, adjusting a second parameter representing a size of a second ellipsoid in the color space, and generating a mask value for a given pixel color based on the location of the given pixel color in the color space, relative to the first and second ellipsoids. The first ellipsoid is centered about a prescribed chroma key color and the second ellipsoid is also centered about the prescribed chroma key color. The second ellipsoid surrounds the first ellipsoid in the color space.

Method and system for chroma key masking

A method, in one exemplary embodiment, for automatically detecting scene changes within a digital video sequence including a succession of frames, including computing metrics, for each of a plurality of frames from a digital video sequence, the metric of a frame being a measure of distance between the frame and a given frame, identifying a candidate frame for which the metric of the candidate frame differs from the metric of the predecessor frame to the candidate frame, by at least a first threshold, determining whether the metrics of successive ones of each of a first plurality of frames, successively following the candidate frame, differ from one another by less than a second threshold, and further determining whether the metrics of each frame of a second plurality of frames, successively preceding the candidate frame, are larger than a third threshold. A system, of one exemplary embodiment, is also described and claimed.

Method and system for scene change detection

A method for chroma key masking including for a given pixel color, calculating a quadratic function of the pixel color coordinates based on a prescribed chroma key color, the quadratic function corresponding to an ellipsoid in a color space, generating a substantially transparent mask value for the given pixel color, if the quadratic function is less than a prescribed lower threshold, generating a substantially opaque mask value for the given pixel color, if the quadratic function is greater than a prescribed upper threshold, and generating a partially transparent mask value for the given pixel color, based on the value of the quadratic function, if the quadratic function is between the prescribed lower threshold and the prescribed upper threshold. A system is also described and claimed.

Growing community of inventors

Toronto, Canada

Geoffrey Park