Method and apparatus for extracting depth edges from images acquired of scenes by cameras with ring flashes forming hue circles

摘要

A set of images is acquired of a scene while illuminating the scene with a set of colors with different hues. The set of colors is generated by a set of light sources arranged in a substantial circular manner around a lens of a camera to form a hue circle, wherein each light source emits a different color. A shadow confidence map is generated from the set of images by using hues and saturations of pixels in the set of images. Then, depth edges are extracted from the shadow confidence map.

主权项

1. A method for extracting depth edges from a set of images, comprising the steps of:
acquiring the set of images of a scene while illuminating the scene with a set of colors, wherein the set of colors is generated by a set of light sources arranged in a single circle around a lens of a camera, wherein complementary colors of the light sources are located at any position and an antipode of the position so that the set of colors correspond to a continuous hue circle, and wherein each light source includes a red, green and blue light emitting diode (LED); generating a shadow confidence map from the set of images by using hues and saturations of pixels in the set of images; and extracting depth edges from the shadow confidence map.