Sky Camera Virtual Horizon Mask and Tracking Solar Disc

The method comprises determining that the clear day exists in response to the apparent diameter of the solar disc being similar to the expected diameter of the solar disc on the clear day and determining that an overcast condition exists in the camera image in response to the apparent diameter of th...

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Bibliographische Detailangaben
Hauptverfasser:	Greenspan, Alex, Hebeisen, Stephen P
Format:	Patent
Sprache:	eng
Schlagworte:	AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FIXED CONSTRUCTIONS FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES FUNCTIONAL ELEMENTS OF SUCH SYSTEMS HEATING LADDERS LIGHTING MECHANICAL ENGINEERING MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS RANGES REGULATING TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	The method comprises determining that the clear day exists in response to the apparent diameter of the solar disc being similar to the expected diameter of the solar disc on the clear day and determining that an overcast condition exists in the camera image in response to the apparent diameter of the solar disc being distorted. The method may further include receiving a camera image of a sky section from a camera at a first location; segmenting the camera image into a first portion around a known position of a solar disc and a second portion of the remainder of the sky section containing an horizon; determining that the solar disc is obstructed by the horizon; and establishing that the first location is experiencing shadow conditions based on the determining.