Real-time adaptive radiometric compensation

Anselm Grundhöfer, Oliver Bimber
2006 ACM SIGGRAPH 2006 Research posters on - SIGGRAPH '06  
Recent radiometric compensation techniques make it possible to project images onto colored and textured surfaces. This is realized with projector-camera systems by scanning the projection surface on a per-pixel basis. With the captured information, a compensation image is calculated that neutralizes geometric distortions and color blending caused by the underlying surface. As a result, the brightness and the contrast of the input image is reduced compared to a conventional projection onto a
more » ... ojection onto a white canvas. If the input image is not manipulated in its intensities, the compensation image can contain values that are outside the dynamic range of the projector. They will lead to clipping errors and to visible artifacts on the surface. In this article, we present a novel algorithm that dynamically adjusts the content of the input images before radiometric compensation is carried out. This reduces the perceived visual artifacts while simultaneously preserving a maximum of luminance and contrast. The algorithm is implemented entirely on the GPU and is the first of its kind to run in real-time.
doi:10.1145/1179622.1179686 dblp:conf/siggraph/GrundhoferB06 fatcat:mpr72w2bujfxxotjhkbypdc5qy