Computer Vision News 10 Congrats, Doctor Tarek! The CultArm3D is a fully automated scanning robot equipped with a highend camera (PhaseOne iXG 100MP) and a D50 light source mounted directly on the camera lens. Due to this geometry, the CultArm3D uses cross-polarization filters (CPF) to eliminate potential and undesirable reflections. It turned out that the literature lacks detailed coverage of the impact of CPF on color imaging and reproduction accuracy, for which Tarek found the incentive and the opportunity to conduct systematic research in this area helping CultArm3D in its mission of capturing accurately color information of virtually any 2D/3D scanned object. Tarek formulated and addressed 3 research questions (RQs) in his publications that were presented at different conferences of the society of Imaging Science and Technology (IS&T). The first question focused on examining the impact of crosspolarization and RGB imaging on color reproduction. It has been found that cross-polarization leads to an unavoidable loss of dark shades (deep blacks; CIELAB(L*) < 20.0 on a Munsell Linear Grayscale), as well as causing an increase in the perceived lightness (CIELAB(L*)) for matte materials, resulting in the perception of washed-out colors. In his second research question, Tarek investigated the influence of CPF on illumination, for any changes in the characteristics of the light source would inevitably impact the reproduction of surface colors of objects. The findings revealed that different CPF brands affect the chroma components of a light source, also known as the white point, in different ways, Tarek A. Haila has just completed and defended successfully his PhD dissertation at the Technical University of Darmstadt in Germany. His research work was in collaboration with Fraunhofer IGD where he worked on the CultArm3D scanning technology during the past 3 years (June 2020 - May 2023). Tarek is a recipient of the prestigious Marie Skłodowska-Curie scholarship. He is very enthusiastic about color perception and reproduction as one can tell from the set of 3D printed color targets he holds in the photo!
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