Radiometric Compensation for Projected Images on Flat Walls

To utilize flat walls as screens for image projection, radiometric compensation for projected images is necessary. This study focuses on the projector characteristics of luminance response and spatial distribution and the luminance reflectance of walls. We developed a radiometric compensation algorithm on the basis of human perceptual characteristics. This algorithm provides viewers with brighter projected images that can make the impression of the projected images close to the impression of the original images. In our experiment, we prepared a flat wall with patterns. We examined whether the projected images, which were radiometrically compensated by our algorithm, looked strange to the viewers. Also, we consider the amount of clipping errors that was acceptable to the viewers and the changes to the projected images that might have caused them to look strange.