Patent ID: 9691002
Date: 2017-06-27
CPC Classifications: G06K,G06T,H04N

Claim:
1. A computer implemented method of adjusting color characteristics of image objects in association with an image of an environment, the environment having at least a first location having a first set of lighting conditions and a second location having a second set of lighting conditions, the method being implemented by a computer system having one or more physical processors programmed by computer program instructions that, when executed by the one or more physical processors, program the computer system to perform the method, the method comprising: identifying, by the computer system, a first marker in the first location, the first marker having a set of known color characteristics under known lighting conditions; obtaining, by the computer system, a set of measured color characteristics of the first marker in the first location, the set of measured color characteristics being representative of effects of the first set of lighting conditions on the first marker; comparing, by the computer system, the set of known color characteristics with the set of measured color characteristics; determining, by the computer system, a first color shift value based on the comparison, wherein the first color shift value represents a difference between the known lighting conditions and the first set of lighting conditions; identifying, by the computer system, a reference, different from the first marker, that exists in both the first location and the second location; obtaining, by the computer system, a second set of measured color characteristics of the reference in the first location, the set of measured color characteristics being representative of effects of the first set of lighting conditions on the reference; and adjusting, by the computer system, the second set of measured color characteristics based on the first color shift value, wherein adjusting the second set of measured color characteristics removes the effects of the first set of lighting conditions to generate an illuminant invariant version of the reference.