Method and system for object reconstruction
A system for object reconstruction includes an illuminating unit, comprising a light source and a generator of a non-periodic pattern. A diffractive optical element (DOE) is disposed in an optical path of illuminating light propagating from the illuminating unit toward an object, thereby projecting the non-periodic pattern onto an object. An imaging unit detects a light response of an illuminated region and generating image data indicative of the object within the projected pattern. A processor reconstructs a three-dimensional (3D) map of the object responsively to a shift of the pattern in the image data relative to a reference image of the pattern.
1. A method for object reconstruction, comprising:
generating a pattern of light spots from an illuminating unit;
projecting the pattern onto an object via a diffractive optical element (DOE) positioned in an optical path of illuminating light propagating from the illuminating unit toward the object;
detecting a light response of an illuminated region and generating image data indicative of the object within the projected pattern; and
processing the image data so as to reconstruct a three-dimensional (3D) map of the object.
2. The method according to claim 1 , wherein the pattern of light spots is non-periodic.
3. The method according to claim 1 , wherein processing the image data comprises reconstructing the 3D map responsively to a shift of the pattern in the image data relative to a reference image of the pattern.
4. The method according to claim 3 , wherein the reference image is acquired at a reference plane oriented normally to the optical path of the illuminating light.
5. The method according to claim 3 , wherein reconstructing the 3D map comprises determining a correlation between the image data and the reference image.
6. The method according to claim 1 , wherein the DOE is configured to adjust a brightness variation of the projected pattern between different regions in a field of view of an imaging unit that generates the image data.
7. The method according to claim 1 , wherein the projected pattern comprises a convolution between the non-periodic pattern and a Fourier transform of the DOE.
8. The method according to claim 1 , wherein detecting the light response comprises capturing an image using a single light detector having a stationary field of view.