Photometrically consistent projection experience for metaverse screens everywhere

Jae Sung Park; Jiman Kim; Seongwoon Jung; Younghoon Jeong; YoungSu Moon

doi:10.1117/12.2631741

3 October 2022 Photometrically consistent projection experience for metaverse screens everywhere

Jae Sung Park, Jiman Kim, Seongwoon Jung, Younghoon Jeong, YoungSu Moon

Proceedings Volume 12216, Novel Optical Systems, Methods, and Applications XXV; 122160N (2022) https://doi.org/10.1117/12.2631741
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

This paper presents a technical ensemble between a mobile projector and smartphone camera for providing colorimetrically calibrated realistic experience everywhere. Since portable projectors can be used in any places without a dedicated white screen, it is very essential to calibrate color of output videos no matter what a colored surface is used for a screen. That is, a calibration process is strongly required to realize the constant intended color experience while using mobile projectors. For that, we build an easy calibration process as follows. First, the (Android or iOS) mobile and projector are connected in a common local common network, and then a mobile application generates a specific electro-optical (RGB-XYZ) conversion function by capturing re ected light from a given specific white plate. The smartphone that plays the role of an optical measurement device transmits measured light information and calibration instruction to the display system. Then the projector adjusts its light outputs and notify the status to the mobile. This `measurement-adjustment' process is recursively conducted within few seconds. The process is completed when the adjustment result meets a stop condition for a calibration target on given colored wall screen. Based on our experimental results of photometric calibration using many kinds of recently released Android and iOS smartphones, the e effectiveness of the methods is proven.

Citation Download Citation

Jae Sung Park, Jiman Kim, Seongwoon Jung, Younghoon Jeong, and YoungSu Moon "Photometrically consistent projection experience for metaverse screens everywhere", Proc. SPIE 12216, Novel Optical Systems, Methods, and Applications XXV, 122160N (3 October 2022); https://doi.org/10.1117/12.2631741

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KEYWORDS

Calibration

Projection systems

Cameras

RGB color model

Manufacturing

Sensors

Information operations

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