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- W4386075594 abstract "Lighting effects such as shadows or reflections are key in making synthetic images realistic and visually appealing. To generate such effects, traditional computer graphics uses a physically-based renderer along with 3D geometry. To compensate for the lack of geometry in 2D Image compositing, recent deep learning-based approaches introduced a pixel height representation to generate soft shadows and reflections. However, the lack of geometry limits the quality of the generated soft shadows and constrains reflections to pure specular ones. We introduce PixHt-Lab, a system leveraging an explicit mapping from pixel height representation to 3D space. Using this mapping, PixHt- Lab reconstructs both the cutout and background geometry and renders realistic, diverse lighting effects for image compositing. Given a surface with physically-based materials, we can render reflections with varying glossiness. To generate more realistic soft shadows, we further propose using 3D-aware buffer channels to guide a neural renderer. Both quantitative and qualitative evaluations demonstrate that PixHt-Lab significantly improves soft shadow generation. Project: https://shengcn.github.io/PixHtLab/" @default.
- W4386075594 created "2023-08-23" @default.
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- W4386075594 date "2023-06-01" @default.
- W4386075594 modified "2023-09-26" @default.
- W4386075594 title "PixHt-Lab: Pixel Height Based Light Effect Generation for Image Compositing" @default.
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- W4386075594 doi "https://doi.org/10.1109/cvpr52729.2023.01597" @default.
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