Patent ID: 11095866

Abstract:
A 3D image sensing system includes: a 3D image sensor (100), including: a light-emitting module (102), configured to emit a structured light to a target (300), the structured light has a known pattern; and a light-sensing module (104) receives a reflected structured light of the structured light that is reflected by the target; and a processor (110), configured to perform a time-of-flight distance measurement to obtain a first distance corresponding to the target based on time-of-flights of the structured light and the reflected structured light, the first distance has a global offset, the processor (110) establishes an unknown distance image based on the reflected structured light, estimates a disparity between the unknown distance image and a known distance image according to the known pattern, calculates a global compensation coefficient based on the disparity, and compensates the first distance to eliminate the global offset according to the global compensation coefficient.