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  • 1
    Electronic Resource
    Electronic Resource
    The European vestibular experiments in spacelab-1
    Amsterdam : Elsevier
    Advances in Space Research 4 (1984), S. 3-9 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(84)90217-5
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    European vestibular experiments on the Spacelab-1 mission: 5. Contribution of the otoliths to the vertical vestibulo-ocular reflex (1986)
    Springer
    Experimental brain research 64 (1986), S. 272-278 
    Details
    ISSN: 1432-1106
    Keywords: Adaptation ; Vestibulo-ocular reflex ; Vertical eye movements ; Otoliths
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The gain of the vestibulo-ocular reflex in the sagittal plane may be due to a cooperation between otoliths and the vertical semi-circular canals. The present space experiment was aimed at studying the influence of the absence of gravity stimulation on the otoliths, by comparing VOR gain and phase in space and on ground. Measurements were taken the 5th and the 7th day of flight, the subject being asked to perform, eyes closed, active head oscillations in pitch while fixating an imaginary target in front of him. No significant decrease of the VOR gain was found in space, but a change in phase was noted. A significant increase of the VOR gain was found 14 h after landing. Control experiments have been done on ground on several subjects. They indicate that pitch VOR gain during active head movements is about one, with eyes open in darkness at 1 Hz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00237743
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Computation of ego motion using the vertical cue (1995)
    Springer
    Machine vision and applications 8 (1995), S. 41-52 
    Details
    ISSN: 1432-1769
    Keywords: Active vision ; Inertial cues ; Visual stabilization ; Structure and motion analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper describes the development and implementation of some layers of a line-segment-based module to recover ego motion while building a 3D map of the environment in which the absolute vertical is taken into account. We use a monocular sequence of images and 2D-line segments in this sequence. The proposed method reduces the disparity between two frames in such a way that 3D vision is simplified. In particular, the correspondence problem is simplified. Moreover, a estimation of the 3D rotation is provided. Using the vertical as a basic cue for 3D-orientation tremendously simplifies and improves the structure from motion paradigm, but the usual equations have to be worked out in a different way. An approach which combines ecological hypotheses and general rigid motion equations is presented, and the equations are derived and discussed in the case of small rigid motions. Algorithms, based on the minimization of theMahalanobis distance between two estimates, are given and their implementations discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213637
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Using Specific Displacements to Analyze Motion without Calibration (1999)
    Springer
    International journal of computer vision 31 (1999), S. 5-29 
    Details
    ISSN: 1573-1405
    Keywords: structure and motion ; specific displacements ; self-calibration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Considering the field of un-calibrated image sequences and self-calibration, this paper analyzes the use of specific displacements (such as fixed axis rotation, pure translations,...) or specific sets of camera parameters. This allows to induce affine or metric constraints, which can lead to self-calibration and 3D reconstruction. A uniformed formalism for such models already developed in the literature plus some novel models are developed here. A hierarchy of special situations is described, in order to tailor the most appropriate camera model to either the actual robotic device supporting the camera, or to tailor the fact we only have a reduced set of data available. This visual motion perception module leads to the estimation of a minimal 3D parameterization of the retinal displacement for a monocular visual system without calibration, and leads to self-calibration and 3D dynamic analysis. The implementation of these equations is analyzed and experimented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008082308694
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    Paper (German National Licenses)
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