Method for Detecting 3D Geometric Boundaries in Images of Scenes Subject to Varying Lighting

摘要

Three-dimensional (3D) geometric boundaries are detected in images of a scene that undergoes varying lighting conditions caused by light sources in different positions, from a set of input images of the scene illuminated by at least two different lighting conditions. The images are aligned, e.g., acquired by a stationary camera, so that pixels at the same location in all of the input images correspond to the same point in the scene. For each location, a patch of corresponding pixels centered at the location is extracted from each input image. For each location, a confidence value that there is a 3D geometric boundary at the location is determined.

主权项

1. A method for detecting a three-dimensional (3D) geometric boundary from a set of two or more input images of a scene illuminated by a set of two or more light sources, wherein pixels at an identical location in all of the input images correspond to the same point in the scene, wherein in each input image the scene is illuminated by a combination of the light sources, and wherein at least two images in the set of input images are illuminated by different combinations of the light sources, comprising the steps of:
obtaining, for each location, a set of patches, wherein each patch in the set is extracted from an identical region of a different input image from the set, wherein each patch contains a pixel at the location; and determining, for each location, a confidence value that the location is on the 3D geometric boundary, wherein the steps are performed in a processor.