Patent ID: 9726543
Date: 2017-08-08
CPC Classifications: G01J,G06T,H04N

Claim:
1. An optical gas imaging (OGI) leak survey system, comprising: an infrared (IR) thermography camera capable of capturing an infrared image of a gas plume, a leak survey result being obtained from the infrared image of the gas plume; a temperature sensor to measure a temperature of the gas plume or ambient air; and a validation system for validating the leak survey result obtained from the infrared image, the validation system coupled to the infrared thermography camera and coupled to the temperature sensor, the validation system including a machine readable storage medium that provides instructions that cause a machine apparatus to perform operations to validate the leak survey result, the operations comprising: acquiring an apparent temperature of each pixel of the infrared image of a scene; acquiring a temperature of the gas plume or ambient air from the temperature sensor; calculating a temperature difference of said each pixel between the apparent temperature of said each pixel and the temperature of the gas plume or ambient air; comparing the temperature difference of said each pixel to a predetermined threshold value; and identifying areas in the scene where absolute values of the temperature difference are smaller than the predetermined threshold value, and identifying the areas in the scene as unsuitable for an OGI leak survey and as the leak survey for these areas is invalid.