Enhancement and Speedup of Photometric Compensation for Projectors by Reducing Inter-Pixel Coupling and Calibration Patterns
Journal
IEEE Transactions on Image Processing
Journal Volume
30
Pages
418-430
Date Issued
2021
Author(s)
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 paper, 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 re-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. ? 1992-2012 IEEE.
Subjects
Color; Computational efficiency; Photometry; Pixels; Accurate estimation; Calibration patterns; Color appearance; Color compensations; Multimedia presentation; Photometric distortions; Projection area; Recalibrations; Calibration
Type
journal article