Enhancement and Speedup of Photometric Compensation for Projectors by Inter-Pixel Decoupling and Calibration Pattern Reduction
Date Issued
2016
Date
2016
Author(s)
Liu, Jen-Shuo
Abstract
For a procam to preserve the color appearance of an image projected on a color surface, the photometric distortion introduced by the color surface has to be properly compensated. The performance of such photometric compensation relies on an accurate estimation of the projector nonlinearity. In this thesis, we improve the accuracy of projector nonlinearity estimation by taking inter-pixel coupling into consideration. In addition, to respond quickly to the change of projection area due to projector movement, we reduce the number of calibration patterns from six to one and use the projected image as the calibration pattern. This greatly improves the computational efficiency of dynamic reflectance calibration that needs to be performed on the fly during a multimedia presentation without breaking its continuity. Both objective and subjective results are provided to illustrate the effectiveness of the proposed method for color compensation on the fly.
Subjects
procam
photometric compensation
gamma nonlinearity estimation
photometric calibration
multimedia presentation.
Type
thesis