Specular edge extraction using multi-flash imaging
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsYuichi Taguchi, Oncel Tuzel, Srikumar Ramalingam
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Abstract
A method and system extract features from an image acquired of an object with a specular surface by first acquiring an image while illuminating the object with a hue circle generated by a set of lights flashed simultaneously. The lights have different colors and are arranged circularly around a lens of a camera. Then, the features correspond to locations of pixels in the image within a neighborhood of pixels that includes a subset of the colors of the lights.
Claims16
A method for extracting features from an image acquired of an object, wherein a surface of the object is specular, comprising the steps of:
- acquiring the image while illuminating the object with a hue circle generated by sets of lights having different colors, wherein each set of lights includes a red, green and blue light emitting diode (LED), and wherein the sets of lights are arranged in a circle around a lens of a camera and flashed simultaneously;
- and
- extracting, as the features, locations of pixels in the image within a neighborhood of pixels, wherein each pixel includes all of the colors of the sets of lights.
A system for extracting features from an image acquired of an object, wherein a surface of the object is specular, comprising:
- a camera;
- sets of lights having different colors and arranged in a circle around a lens of the camera to form a hue circle, wherein each set of lights includes a red, green and blue light emitting diode (LED), and wherein the sets of lights are flashed simultaneously while acquiring the image;
- and
- a processor configured to extract, as the features, locations of pixels in the image within a neighborhood of pixels, wherein each pixel includes all of the colors of the sets of lights.
Dependencies are inferred from the claim text.