3-dimensional image acquisition apparatus and method of extracting depth information in the 3D image acquisition apparatus
First Claim
1. A depth information extracting method comprising:
- projecting N different pieces of projection light onto an object;
modulating N pieces of reflection light reflected from the object with an optical modulation signal;
generating N images by capturing the N pieces of modulated reflection light;
generating a first averaged image by multiplying the N images by primary weights and generating a second averaged image by multiplying the N images by secondary weights;
acquiring an average phase delay based on the first and second averaged images; and
calculating a distance to the object based on the average phase delay.
1 Assignment
0 Petitions
Accused Products
Abstract
A 3 dimensional (3D) image acquisition apparatus and a method of extracting depth information in the 3D image acquisition apparatus are provided. The method of extracting depth information includes sequentially projecting N (N is a natural number equal to or greater than 3) different pieces of projection light onto a object; modulating N pieces of reflection light reflected from the object with an optical modulation signal having a gain waveform; generating N images by capturing the N pieces of modulated reflection light; generating a first averaged image by multiplying the N images by primary weights and generating a second averaged image by multiplying the N images by secondary weights; acquiring an average phase delay from the first and second averaged images; and calculating a distance to the object from the average phase delay.
73 Citations
33 Claims
-
1. A depth information extracting method comprising:
-
projecting N different pieces of projection light onto an object; modulating N pieces of reflection light reflected from the object with an optical modulation signal; generating N images by capturing the N pieces of modulated reflection light; generating a first averaged image by multiplying the N images by primary weights and generating a second averaged image by multiplying the N images by secondary weights; acquiring an average phase delay based on the first and second averaged images; and calculating a distance to the object based on the average phase delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A depth information extracting method comprising:
-
projecting N identical pieces of projection light onto an object; modulating N pieces of reflection light reflected from the object with N optical modulation signals having different gain waveforms, respectively; generating N images by capturing the N pieces of modulated reflection light; generating a first averaged image by multiplying the N images by primary weights and generating a second averaged image by multiplying the N images by secondary weights; acquiring an average phase delay based on the first and second averaged images; and calculating a distance to the object from the average phase delay. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
-
24. A 3 Dimensional (3D) image acquisition apparatus comprising:
-
a light source that projects at least three different pieces of projection light onto an object; an optical modulator that modulates at least three pieces of light reflected from the object with an optical modulation signal; an image pickup device that generates at least three images by capturing the light modulated by the optical modulator; and a depth image processor that calculates a distance to the object by using the at least three images generated by the image pickup device, wherein the depth image processor extracts depth information by generating a first averaged image by multiplying the at least three images by primary weights and generating a second averaged image by multiplying the at least three images by secondary weights; acquiring an average phase delay based on the first and second averaged images; and calculating the distance to the object based on the average phase delay. - View Dependent Claims (25, 26, 27, 28, 29)
-
-
30. A 3 Dimensional (3D) image acquisition apparatus comprising:
-
a light source that projects at least three identical pieces of projection light onto an object; an optical modulator that modulates at least three pieces of light reflected from the object with at least three optical modulation signals having different gain waveforms; an image pickup device that generates at least three images by capturing the at least three pieces of light modulated by the optical modulator; and a depth image processor that calculates a distance to the object by using the image generated by the image pickup device, wherein the depth image processor extracts depth information by generating a first averaged image by multiplying the at least three images by primary weights and generating a second averaged image by multiplying the at least three images by secondary weights; acquiring an average phase delay based on the first and second averaged images; and calculating the distance to the object from the average phase delay. - View Dependent Claims (31, 32, 33)
-
Specification