Mr. Sungwoon Jeong Profile

Sungwoon Jeong

at SAMSUNG Electronics Co., Ltd.

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Proceedings Article | 3 October 2022 Paper

Photometrically consistent projection experience for metaverse screens everywhere

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

Proceedings Volume 12216, 122160N (2022) https://doi.org/10.1117/12.2631741

KEYWORDS: Calibration, Projection systems, Cameras, RGB color model, Manufacturing, Sensors, Visualization, Optical testing, Information operations, Reflectivity

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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.

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