Mitigation of disocclusion artifacts
AssigneeAffine Technologies LLC
InventorChad Mourning
Life of this patent
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Abstract
Image based imposters suffer from common errors called disocclusion artifacts where portions of the scene that should be occluded by real geometry are visible when using image based imposters. These artifacts are the result of parallax error created by camera motion where regions of a mesh that were not visible at the time of imposter generation have become visible. A computationally inexpensive on-line technique to resolve these disocclusions stretches existing imposter texture information over new geometry bridging the gap between imposters.
Claims16
A method for generating images comprising:
- forming a bridge between a sequence of a plurality of points, each consecutive pair of the sequence of points being points along an interface between two adjacent sub-meshes replaced by image-based imposters, wherein the plurality of points have the same screen space position and different world space positions when projected into the plane of the imposter;
- generating content of textures to be mapped onto the image-based imposters;
- and
- computing texture coordinates for a generation position and a second camera position,
- wherein the step of computing texture coordinates for the second camera position comprises stretching the textures over the respective imposters, and
- wherein the textures are stretched based on a weighted metric such that as segments of the bridge corresponding to the imposters become visible the stretching of the textures increases.
An apparatus for generating an image comprising:
- a bridge forming section configured to form a bridge between a sequence of a plurality of points, each consecutive pair of the sequence of points being points along an interface between two adjacent sub-meshes replaced by image-based imposters, wherein the plurality of points have the same screen space position and different world space positions when projected into the plane of the imposter;
- a texture generating section configured to generate textures to be mapped onto the image-based imposters;
- and
- a texture computing section configured to compute texture coordinates for a generation position and a second camera position,
- wherein, for the second camera position, the texture computing section is further configured to stretch the textures over the respective imposters, and
- wherein the textures are stretched based on a weighted metric such that as segments of the bridge corresponding to the imposters become visible the stretching of the textures increases.
Dependencies are inferred from the claim text.