Correcting projection display non-uniformity using a webcam

In this study we investigate the feasibility of using an inexpensive webcam to correct the projection display non-uniformity. Two main approaches are proposed and evaluated, the colorimetric characterization and the global characterization. Both approaches are based on displaying images, which should ideally have uniform color distribution, capturing the displayed image with the webcam, and using this captured image, creating a correction function, which is then applied to images in order to, correct them. Our results show that the feasibility of the proposed methods depends a lot on the qualities of the equipment involved. For standard webcams it is generally difficult to obtain reliable device-independent color measurements needed for the colorimetric characterization.