Communication Papers of the 18th Conference on Computer Science and Intelligence Systems

DOI: http://dx.doi.org/10.15439/2023F9900

Citation: Communication Papers of the 18th Conference on Computer Science and Intelligence Systems, M. Ganzha, L. Maciaszek, M. Paprzycki, D. Ślęzak (eds). ACSIS, Vol. 37, pages 153–156 (2023)

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Abstract. This paper describes a system that combines several projectors to display a common image. Human visual perception of an image is largely dependent on contrast. When external light sources are present, the contrast of the projected image decreases. Increasing the brightness of the projector is limited by technology. By combining several projectors into one system it is possible to increase brightness, and thus contrast, without using more expensive projectors. The method of calibrating the system involves displaying the ChArUco board and taking pictures of them with a smartphone camera. Based on the detected markers, homographies are found. Then the image is modified so that each projector displays the same pixel of the input image at each point of the common projection area. Compared to existing commercial systems this one does not require a dedicated projector or camera model. Nevertheless, the results show an improvement in image quality.

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