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High-Definition Radiometric Compensation

We propose a novel radiometric compensation method that applies a high-spatial-resolution camera to a projector-camera system in order to reduce the artifacts around the regions where the reflectance of the projection surface changes steeply. The proposed method measures the reflection in the region of a single projector pixel on a projection surface with multiple camera pixels. From the measurement, it computes multiple color-mixing matrices, each of which represents a color space conversion between each camera pixel and the projector pixel. Using these matrices, we calculate the optimal projection color by applying the linear least squares method, so that the displayed color in the projector pixel region is as close as possible to the target appearance. Through projection experiments, we confirm that our proposed method reduces the artifacts around the regions where the reflectance changes steeply, when compared to other conventional compensation methods.

Experimental results(proposed method: 2nd column, conventional method: 3rd and 4th columns)

Publications

  • Shoichiro Mihara, Daisuke Iwai, and Kosuke Sato, "Artifact Reduction in Radiometric Compensation of Projector-Camera Systems for Steep Reflectance Variations," IEEE Transactions on Circuits and Systems for Video Technology, Vol. 24, No. 9, pp. 1631-1638, 2014.
  • Shoichiro Mihara, Daisuke Iwai, and Kosuke Sato, "Error Minimization of Radiometric Compensation for Subpixel Reflectance Variation," In Proceedings of IEEE Global Conference on Consumer Electronics (GCCE), pp. 449-450, 2013.