Single projector radiometric compensation technique has made it possible for a projector to display on ordinary surface with colors and textures. However

when applying these methods to multi-projectors

many issues will happen

including the inconsistence in intensity of the overlapping areas

region expansion of a single pixel

all of which will lead to failure of the compensation. This paper presents a multi-projector and camera system with the ability of geometry correction

radiometric compensation and photometric consistency and solves the problems as mentioned. We use a convenient and iterative way to obtain more precise parameter of the reflection property for the projecting surface. This only considers two or more pictures of the projecting-surface

so that it can provide much better compensation results. We also improve the blending effects of the overlapped areas of multi-projectors and thus provide a unified solution for radiometric compensation and photometric inconsistency when displaying on non-optimized surfaces with multi-projectors. Experiments indicate the improvements of the new method compared to the original algorithm.