Camera calibration with lenticular arrays
View Patent ↗The present disclosure is directed to an approach to solve camera calibration from a single picture of a simply structured light field created by viewing a carefully designed lenticular sheet. The lenticular sheet has different colors visible at different relative orientations and gives linear constraints on the K-1?R matrix which can be decomposed to give the rotation and calibration. The method uses geometric cues from hue measurements and does not require a correspondence between a point in the image and a point on the calibration pattern.
1. A method of calibrating a camera, the method comprising:
creating a light field with a lenticular array, the lenticular array comprising at least one sheet, the at least one sheet comprising a plurality of colors; and,
using a single picture of the light field to calibrate the camera, wherein the camera is calibrated without information from a correspondence between a point on an image and a point on a calibration object.
2. The method of claim 1 , wherein the plurality of colors are visible at a plurality of locations on the sheet.
3. The method of claim 1 , wherein the sheet comprises plastic.
4. The method of claim 1 , wherein the at least one sheet comprises a plurality of parallel cylindrical lenses.
5. A method of calibrating a camera for an augmented reality application, the method comprising:
using a calibration object to create a color-coded light field, wherein the calibration object is based on at least one lenticular array, each lenticular array comprising at least one sheet, the at least one sheet comprising a plurality of colors;
estimating a focal length of the camera and a relative orientation and position of the object from a single image; and,
calibrating the camera, wherein the camera is calibrated without information from a correspondence between a point on an image and a point on a calibration object.
6. The method of claim 5 , wherein the plurality of colors are visible at a plurality of locations on the sheet.
7. The method of claim 5 , wherein the sheet comprises plastic.
8. The method of claim 5 , wherein the at least one sheet comprises a plurality of parallel cylindrical lenses.