Robust Photometric Projector Compensation

Project Members

Anselm Grundhöfer (Disney Research Zurich)

 

PROJECT_PhotometricProjectorCompensation_teaser

Samples of the developed non-linear photometric compensation method using difference setups. The upper row (a-d) shows the desired input images, the bottom row (e-h) the captured projections. In (i-k) the surfaces are shown under white projector illumination: In (a) a home cinema LCD projector is used, in (b-d) a DLP projector is used projecting in a steep angle from the right hand side.

Photometric projector compensation is used in various application fields, such as building projections and augmented reality. Its preparation, however, is still a laborious process. While several algorithms have been already presented which generate compensated projections with impressive quality, they all require the devices to be, at least partially, radiometrically calibrated and accurately registered to the surface. This process can be cumbersome and time consuming reducing the overall flexibility of the system. Furthermore, it makes the algorithms impractical to deploy, because non-experts might not be able to re-calibrate it accurately and thus the projection quality will be significantly degraded. The main goals of this project are: (1) Development of a compensation algorithm which does not require any radiometrical pre-calibration of the cameras and projectors. (2) Research on how to optimize the compensation images such that it even preserves a high perceptual quality in the case of slight misregistrations.

The developed non-linear color mapping methods are also able to generate high quality results in other applications fields, such as display gamut mapping as well as color space mapping for images and videos

Publications

Practical Non-linear Photometric Projector Compensation-Thumbnail

Practical Non-linear Photometric Projector Compensation
June 28, 2013
IEEE International Workshop on Computational Cameras and Displays (CCD/PROCAMS) 2013
Paper File [pdf, 2.94 MB]

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