Adobe, Inc.

Scott S Snibbe

David P Simons

Daniel M Wilk

David F Herbstman

A computer-implemented method and apparatus for reparameterizing a parametric function representing an animation feature in an animation system where the parametric function is represented by a curve having unequal arc-length per unit parameter. The system samples at intervals of the parameter along the length of the curve and then calculates the arc-length over each interval. Thereafter, one or more differentiable curves are fitted to the parameter, arc-length pairs.

Arc-length reparameterization

A computer-implemented method and apparatus for animating a property (such as the position of an object) using floating keyframes to selectively decouple property space and time constraints. Fixed keyframes and floating keyframes may used to specify a path through an n-dimensional property space, but the motion along the path is controlled only by the fixed keyframes. The timing of the floating keyframes is determined by temporal attributes of the nearest fixed keyframes.

Floating keyframes

A method for compositing first and second digital images having different pixel aspect ratios to reduce distortion of image content. The method includes determining a scaling factor from first and second pixel aspect ratios; scaling a first image by the scaling factor; and compositing the first and second images into a composite image. The scaling step may be limited to stretching or squashing the first image in only a horizontal direction. The scaling step may include resampling the first image. In another aspect, the invention features a method for controlling motion along a motion path in a composition having nonsquare pixels. The method includes determining a scaling factor based on the composition pixel aspect ratio; applying the scaling factor to a copy of the motion path; reparameterizing the copy of the motion path to generate a scaled motion mapping; and using the scaled motion mapping to control motion along the motion path. The motion path may define the motion of a layer in the composition.

Transforming images with different pixel aspect ratios

Values for a property of a layer in a composition over a period of time are established by sampling user input at a sequence of sample times to obtain a sequence of input values, corresponding the sequence of sample times with a sequence of layer times, and determining a sequence of property values for the first layer from the sequence of input values, the sequence of property values corresponding to the sequence of layer times.

Defining a time-variable property in digital compositions

Data for a temporal sequence of composition frames is created from data of a temporal sequence of footage frames by identifying a set of the footage frames temporally corresponding to a set of the composition frames and blending data from the set of footage frames to create data for the set of composition frames.

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Scott S Snibbe