Patent ID: 8054290

Claim:
In a structured light depth sensor system comprising a structured light depth sensor, a method comprising: projecting a light pattern onto an object and modulating an intensity of the light pattern as a function of time; detecting via an image sensor a first image of the light pattern as reflected from the object at a first light pattern intensity and a second image of the light pattern as reflected from the object at a second light pattern intensity, wherein the first image and the second image are acquired at a rate based upon a beat frequency of an ambient light source and the light pattern is displayed at the first light pattern intensity for a duration of an integration/read cycle of the image sensor; subtracting the first image from the second image to form a contrast-enhanced image of the light pattern as reflected from the object; and based upon a motion of the object as detected via the contrast-enhanced image of the light pattern, controlling an application that is providing output to a display.