Patent ID: 9204018
Filing Date: 2015-12-01
Classification: G06K,G06T,H04N

Abstract:
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 stored on a non-transitory computer readable medium 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; adjusting, by the computer system, the second set of measured color characteristics based on the first color shift value, wherein the adjusted second set of measured color is utilized to remove the effects of the first set of lighting conditions to generate an illuminant invariant version of the reference; and obtaining, by the computer system, a third set of measured color characteristics of the reference in the second location, the third set of measured color characteristics being representative of effects of the second set of lighting conditions on the reference; comparing, by the computer system, the adjusted second set of measured color characteristics with the third set of measured color characteristics; determining, by the computer system, a second color shift value based on the comparison of the adjusted second set of measured color characteristics with the third set of measured color characteristics, wherein the second color shift value represents a difference between the first set of lighting conditions and the second set of lighting conditions.