Shape from Silhouette in Space, Time and Light Domains

Mikhnevich, Maxim; Laurendeau, Denis

doi:10.5220/0004722403680377

Cited by 2 publications

(2 citation statements)

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“…For example, when this technique was used in Ref. [ 18 ] to reconstruct a wine glass, the opening of the hollow end was covered. Similarly, it is known that any convex cavities (small craters) around the external surface of the object are ‘filled up’ due to the nature of the visual hull technique.…”

Section: Resultsmentioning

confidence: 99%

“…There have been multiple attempts to create alternative spray-less digitization techniques for transparent objects in the past [ 1 , 2 ]. The proposed techniques include the use of OPT with refractive index-matching liquid [ 7 ], the fringe projection for detection of pattern differences [ 8 ], infra-red (IR) to detect induced surface heating [ 9 , 10 ], Infrared Digital Holography [ 11 ], ultra-violet (UV) fluorescence [ 12 , 13 ], a combination of X-ray tomography and photogrammetry [ 14 ], shape from polarization [ 15 ], a combination of polarization imaging and inverse rendering [ 16 ], shape from interaction [ 17 ], the visual hull technique [ 18 ], various AI-based image processing methods [ 19 , 20 ] terahertz (THz) Imaging and tomography [ 21 , 22 ], passive single-pixel imaging [ 23 ], and edge estimation computer vision techniques [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Large Scale Optical Projection Tomography without the Use of Refractive-Index-Matching Liquid

Stavroulakis,

Ganetsos,

Zabulis

2023

Sensors

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The practical, rapid, and accurate optical 3D reconstruction of transparent objects with contemporary non-contact optical techniques, has been an open challenge in the field of optical metrology. The combination of refraction, reflection, and transmission in transparent objects makes it very hard to use common off-the-shelf 3D reconstruction solutions to accurately reconstruct transparent objects in three dimensions without completely coating the object with an opaque material. We demonstrate in this work that a specific class of transparent objects can indeed be reconstructed without the use of opaque spray coatings, via Optical Projection Tomography (OPT). Particularly, the 3D reconstruction of large thin-walled hollow transparent objects can be achieved via OPT, without the use of refractive-index-matching liquid, accurately enough for use in both cultural heritage and beverage packaging industry applications. We compare 3D reconstructions of our proposed OPT method to those achieved by an industrial-grade 3D scanner and report average shape differences of ±0.34 mm for ‘shelled’ hollow objects and ±0.92 mm for ‘non-shelled’ hollow objects. A disadvantage of using OPT, which was noticed on the thicker ‘non-shelled’ hollow objects, as opposed to the ‘shelled’ hollow objects, was that it induced partial filling of hollow areas and the deformation of embossed features.

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Section: Resultsmentioning

confidence: 99%