Object shadowing in head worn computing

Abstract

Aspects of the present disclosure relate to shadowing objects displayed in head worn computing. A method includes capturing an image of an environment in proximity to a person, analyzing the image to determine a position of each of a plurality of light sources collectively producing a naturally formed shadow in the environment, wherein the naturally formed shadow comprises multiple shadows cast from an individual object in the environment, each of the multiple shadows formed from light traveling from a position of one of the plurality of light sources to the individual object, and displaying a computer-generated object in association with a computer generated shadow, wherein the computer-generated shadow appears as though produced by light striking the computer generated object from the position of a dominant one of the plurality of light sources.

1 . (canceled) 
     
     
         2 . A method comprising:
 presenting, on a transmissive display of a wearable head device, a virtual object, wherein the presenting comprises presenting the virtual object at a position on the transmissive display corresponding to a first location in a real environment of the wearable head device;   determining a location of a first light source in the real environment, the first light source corresponding to light directed at the first location and visible to a user of the wearable head device via the transmissive display;   determining, based on the virtual object and the location of the first light source, a virtual shadow indicative of an occlusion of the first light source by the virtual object; and   presenting, on the transmissive display, concurrently with presenting the object, the determined virtual shadow.   
     
     
         3 . The method of  claim 2 , wherein:
 the wearable head device comprises one or more sensors; and   determining the location of the first light source comprises determining the location of the first light source based on an output of the one or more sensors.   
     
     
         4 . The method of  claim 3 , wherein the one or more sensors comprises a GPS unit and the output of the one or more sensors comprises a GPS location. 
     
     
         5 . The method of  claim 3 , wherein:
 the one or more sensors comprises a camera, and   determining the location of the first light source comprises determining a location corresponding to a dominant light source detected via the camera.   
     
     
         6 . The method of  claim 2 , wherein the first light source comprises the sun and determining the location of the first light source comprises determining the location of the first light source based on one or more of a compass output, a time of year, and a time of day. 
     
     
         7 . The method of  claim 2 , further comprising determining a location of a second light source in the real environment, the second light source corresponding to light directed at the first location, wherein the virtual shadow is determined based further on the location of the second light source. 
     
     
         8 . A wearable head device comprising:
 a transmissive display; and   one or more processors configured to perform a method comprising:
 presenting, on the transmissive display, a virtual object, wherein the presenting comprises presenting the virtual object at a position on the transmissive display corresponding to a first location in a real environment of the wearable head device; 
 determining a location of a first light source in the real environment, the first light source corresponding to light directed at the first location and visible to a user of the wearable head device via the transmissive display; 
 determining, based on the virtual object and the location of the first light source, a virtual shadow indicative of an occlusion of the first light source by the virtual object; and 
 presenting, on the transmissive display, concurrently with presenting the object, the determined virtual shadow. 
   
     
     
         9 . The wearable head device of  claim 8 , wherein:
 the wearable head device further comprises one or more sensors; and   determining the location of the first light source comprises determining the location of the first light source based on an output of the one or more sensors.   
     
     
         10 . The wearable head device of  claim 9 , wherein the one or more sensors comprises a GPS unit and the output of the one or more sensors comprises a GPS location. 
     
     
         11 . The wearable head device of  claim 9 , wherein:
 the one or more sensors comprises a camera, and   determining the location of the first light source comprises determining a location corresponding to a dominant light source detected via the camera.   
     
     
         12 . The wearable head device of  claim 8 , wherein the first light source comprises the sun and determining the location of the first light source comprises determining the location of the first light source based on one or more of a compass output, a time of year, and a time of day. 
     
     
         13 . The wearable head device of  claim 8 , the method further comprising determining a location of a second light source in the real environment, the second light source corresponding to light directed at the first location, wherein the virtual shadow is determined based further on the location of the second light source.