Photometric stereo in a scattering medium
WebThis paper presents a photometric stereo method that works for optically thick translucent objects exhibiting subsurface scattering. Our method is built upon the previous studies showing that subsurface scattering is approximated as convolution with a blurring kernel. Webon photometric stereo, which estimates surface normals from intensity changes under varying illumination. In air, photometric stereo produces high-quality geometry, even in …
Photometric stereo in a scattering medium
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WebPhotometric stereo is widely used for 3D reconstruction. However, its use in scattering media such as water, biological tissue and fog has been limited until now, because of forward scattered light from both the source and object, as well as light scattered back from the medium (backscatter). WebSep 27, 2016 · Abstract. Photometric stereo is widely used for 3D reconstruction. However, its use in scattering media such as water, biological tissue and fog has been limited until …
WebJun 26, 2006 · For both methods, we derive physical models for the appearances of a surface immersed in a scattering medium. Based on these models, we present results on (a) the condition for object detectability in light striping and (b) the number of sources required for photometric stereo. WebApr 24, 2013 · We have presented an empirical study on the effects of translucency on photometric stereo. We have shown that multiple scattering has a blurring effect on the photometric normals, resulting in a less detailed shape characterization. We have shown that the relative size of mean free path versus geometrical feature size is the primary …
WebJul 1, 2024 · Near-lighting Photometric Stereo for unknown scene distance and medium attenuation. Image and Vision Computing, Volume 57, 2024, pp. 44-57. Show abstract. ... (unknown scattering level), Photometric Stereo becomes ambiguous. Previous approaches have tackled the problem by assuming distant-lighting and resorting to external hardware … WebApr 14, 2013 · Including in the processing chain, a model of the attenuating medium increases the overall computational complexity, while, since such a model is only a mathematical approximation of the complex real-world scattering phenomena, approximation-related errors are propagated to the main photometric stereo …
WebJan 1, 2024 · Photometric Stereo aims at estimating the normals and albedo for every pixel given the measured direct component from every source. Let us examine the unknown variables. The coordinates of the scene point can be expressed with respect to the pixel coordinates as P = ( X, Y, Z) = u Z f, v Z f, Z.
WebPhotometric stereo is widely used for 3D reconstruction. However, its use in scattering media such as water, biological tissue and fog has been limited until now, because of … flora innovative lighting limitedWebSep 27, 2016 · Photometric stereo is widely used for 3D reconstruction. However, its use in scattering media such as water, biological tissue and fog has been limited until now, because of forward scattered light from both the source and object, as well as light … flora innes houseWebA video camera (Canon XL-1S) views the scene as well as the medium with the effects of scattering. In the case of photometric stereo, the same tank setup is illuminated by 11 … flora inn hotel dubai airport addressWebphotometric stereo - in the presence of scattering. For both methods, we derive physical models for the appearances of a surface immersed in a scattering medium. Based on … flora insightsWebPhotometric stereo is widely used for 3D reconstruction. However, its use in scattering media such as water, biological tissue and fog has been limited until now, because of … flora infection bacterialWebfor scattering media, called the dehazing cost volume. In scattering media, light bouncing off a scene is attenuated exponentially relative to the depth. On the other hand, scat-tered light observed with a camera increases with depth. This means that degradation due to a scattering medium de-pends on the scene depth. Our dehazing cost volume can flora inn hotel dubai airport contact numberWebOct 1, 2024 · This means that degradation due to a scattering medium depends on the scene depth. Our dehazing cost volume can restore images with such depth-dependent degradation and compute the effective cost of photometric consistency simultaneously. ... Photometric stereo in a scattering medium. IEEE Trans. Pattern Anal. Mach. Intell., 39 (9) … great sacandaga lake new york real estate