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- W2552291142 abstract "Measuring the volume of dirt particles within the context of technical cleanliness is a crucial task, because the measured 3D shape yields important information concerning the risks those particles might cause while operating the technical component in the intended application. The production process therefore needs to be optimized to take care, that such particles are not introduced into the final product during fabrication. Measuring 3D volume in the range of a few microns concerning the area of a particle implies expensive microscope measuring devices. In this paper we describe a hardware approach combined with software algorithms using eight LED lights for illuminating the specimen from various known directions. The LEDs are used to produce cast shadows of the specimen to be inspected. The circular layout of the LEDs takes care to illuminate the particles out of different directions to yield shadows surrounding the whole object. The brightness of the LEDs can be manipulated to adapt for various specimen with different reflection properties. Our model driven approach uses a grid, which is aligned to the image data in order to sample the surface for estimating the height at those discrete positions. The model-driven approach incorporates the measurement results given by established state-of-the-art microscopes for initial calibration. The estimated heights are illustrated in a 2.5D pseudo-color representation and evaluated from a quality point of view. The approach described in this paper yields a practical solution for estimating 3D shape and volume with little hardware requirements and therefore low maintenance costs." @default.
- W2552291142 created "2016-11-30" @default.
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- W2552291142 date "2016-11-10" @default.
- W2552291142 modified "2023-09-27" @default.
- W2552291142 title "Estimating 3D Volume of Dirt Particles Using Depth from Shadow" @default.
- W2552291142 cites W2484305125 @default.
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- W2552291142 doi "https://doi.org/10.1007/978-3-319-46601-9_26" @default.
- W2552291142 hasPublicationYear "2016" @default.
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