Automatic alignment of high-resolution multi-projector display using an un-calibrated camera

A scalable, high-resolution display may be constructed by tilingmany projected images over a single display surface. One fundamentalchallenge for such a display is to avoid visible seams dueto misalignment among the projectors. Traditional methods foravoiding seams involve sophisticated mechanical devices and expensiveCRT projectors, coupled with extensive human effort forfine-tuning the projectors. This paper describes an automatic alignmentmethod that relies on an inexpensive, uncalibrated camera tomeasure the relative mismatches between neighboring projectors,and then correct the projected imagery to avoid seams without significanthuman effort.