A New Illumination Compensation Method based on Color Optimization Function for Generating 3D Volumetric Model

In this paper, we propose a color correction technique for images acquired through a multi-view camera system for acquiring a 3D model. It is assumed that the 3D volume is captured indoors, and the position and intensity of the light is constant over time. 8 multi-view cameras are used, and converging toward the center of the space, so even if the lighting is constant, the intensity and angle of light entering each camera may be different. Therefore, a color optimization function is applied to a color correction chart taken from all cameras, and a color conversion matrix defining a relationship between the obtained 8 images is calculated. Using this, the images of all cameras are corrected based on the standard color correction chart. This paper proposed a color correction method to minimize the color difference between cameras when acquiring an image using 8 cameras of 3D objects, and experimentally proved that the color difference between images is reduced when it is restored to a 3D image. Keyword : illumination compensation, 3D volumetric model, calibration, color optimization function Copyright C 2020 Korean Institute of Broadcast and Media Engineers. All rights reserved. “This is an Open-Access article distributed under the terms of the Creative Commons BY-NC-ND (http://creativecommons.org/licenses/by-nc-nd/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited and not altered.” 일반논문 (Regular Paper) 방송공학회논문지 제25권 제4호, 2020년 7월 (JBE Vol. 25, No. 4, July 2020) https://doi.org/10.5909/JBE.2020.25.4.598 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) 박병서 외 3인: 3차원 체적 모델의 생성을 위한 색상 최적화 함수 기반의 조명 보상 기법 599 (Byung-Seo Park et al.: A New Illumination Compensation Method based on Color Optimization Function for Generating 3D Volumetric Model)