Realistic projection on casual dual-planar surfaces with global illumination compensation

Shamsuddin N Ladha, Kate Amanda Smith-Miles, Sharat Chandran

Research output: Contribution to journalArticleResearchpeer-review


Projectors are deployed in increasingly demanding environments. The fidelity of the projected image as seen by a user is compromised when projectors are deployed in dual-planar environments (e.g. corner of a room or an office cubicle), thereby diminishing the richness of the user experience. There are many reasons for this. The focus of this paper is to compensate for the global illumination effects due to inter-reflection of light. In the process we also correct geometry distortion. Our system is built from off-the-shelf components and easily deployable without any elaborated setup. In this paper, we describe two complementary methods to compensate for global illumination effects in dual-planar environments. Our methods are based on the systematic adaptation and interpretation of the classical radiosity equation in the image domain. The technique neither assumes nor computes 3D scene geometry, relying on an implicit inference. The system is calibrated in an off-line mode once; in our first method, corrected images and video are computed in real time, and in our second method, a richer scene is offered with a modest increase in computational time. The corrected images when projected have better contrast and are more appealing to the user.
Original languageEnglish
Article number1650014
Number of pages29
JournalInternational Journal of Image and Graphics
Issue number3
Publication statusPublished - 2016


  • Projector camera systems
  • global illumination compensation
  • image improvement

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