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User interface in interactive virtual environment based on real location

Smagur A., Nowak K.

Acta Innovations

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2017

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no. 25

29--37

EN

Nowadays we see an increase of interest in immersive technologies connected with new modes of communication. With novel devices possibilities open for research in the field of Human-Computer Interfaces (HCI) and Virtual Reality (VR). This project is focused on the creation of interactive virtual reality scenery and on the verification of usefulness of different interfaces in such contexts. We designed a virtual urban space that is accessible to users through VR goggles: Oculus Rift paired with Leap Motion. We prepared an experiment to test how well users can interact in proposed virtual environment through this setup. Results show that in simple tasks users can quickly learn on their own how to use given interface without tutoring.

2

Three-dimensional imaging of the Jurassic radiolarian Protunuma ? ochiensis Matsuoka : an experimental study using high-resolution X-ray micro-computed tomography

Ishida N., Kishimoto N., Matsuoka A., Kimoto K., Kurihara T., Yoshino T.

Volumina Jurassica

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2015

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Vol. 13, no. 1

77--82

EN

To evaluate the utility of high-resolution micro-computed tomography (micro-CT) in observing radiolarian fossils, we examined the skeleton of the Jurassic radiolarian fossil Protunuma ? ochiensis Matsuoka using a micro-CT device. Although this species is a closed Nassellarian with a thick exterior wall, important taxonomic characters on the interior and exterior of the shell were represented almost perfectly in the acquired three-dimensional computer graphic images. These characters include those documented in the original description, such as the height and width of the skeleton, the outline, the number of segments, the pore arrangement and other features. In addition, the structure of the initial spicule of this species was revealed newly. An enlarged plaster radiolarian model printed using the laminated modelling method was useful for detailed observation. Nondestructive omnidirectional observation is an advantage of this method, which is not possible with scanning electron microscopy or optical microscopic investigations. Micro-CT technology would become an effective observational tool for radiolarian studies in the near future.

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Digital holography and holographic interferometry

Kreis T. M.

Machine Graphics and Vision

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1999

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Vol. 8, No. 4

611-624

EN

Holography is a method for three-dimensional imaging frequently used in metrology and nondestructive testing. Up to now both the generation of the holograms as well as the reconstruction of the wavefields was performed optically. In digital holography optically generated Fresnel- or Fraunhofer holograms are recorded by a CCD array. The reconstruction of the wavefields is done digitally by image processing methods based on the mathematical concept of the diffraction integral. Two approaches to its numerical solution are the finite discrete Fresnel transform and a procedure employing the convolution theorem. Both approaches result in a complex field from which intensity and phase can be determined. In digital holographic interferometry the sign-correct interference phase distribution is computed with high accurancy by subtraction of two numerically reconstructed phase distributions.