Patent ID: 9310488
Filing Date: 2016-04-12
CPC Classification: G01S

Claim Text:
1. An apparatus for generating a depth image, the apparatus comprising: an optical modulator which optically modulates reflective light which is reflected light from an object to which light modulated using a first pseudorandom (PN) sequence is irradiated, by use of second PN-sequences, each of which has a same PN sequence as the first PN-sequence, but the second PN-sequences having N different time shifts; an optical sensor which senses the optically modulated reflective light; and a depth image process unit which samples N intensity images from the optically modulated reflective light sensed by the optical sensor and generates a depth image of the object using the sampled N intensity images, wherein the depth image process unit individually determines respective depth extraction errors of each of a plurality of depths when the plurality of depths are determined according to a plurality of times of flight of light that are predicted using the N sampled intensity images, and selects a depth of the plurality of depths having a smallest error deviation estimate of the errors as a final depth of the depth image, wherein the depth image process unit calculates a time of flight of light that is irradiated from a light source and reaches the optical sensor based on the N sampled intensity images, and wherein when N is a number that is equal to or greater than 3, the depth image process unit determines whether an intensity image I