Results 1 to 10 of about 75,693 (241)
Parameter-free radial distortion correction with centre of distortion estimation [PDF]
Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1, 2005 We propose a method of simultaneously calibrating the radial distortion function of a camera and the other internal calibration parameters. The method relies on the use of a planar (or, alternatively, nonplanar) calibration grid which is captured in several images. In this way, the determination of the radial distortion is an easy add-on to the popular
Hartley, Richard, Kang, Sing Bing
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Distortion Is Fixed Parameter Tractable [PDF]
ACM Transactions on Computation Theory, 2009 We study low-distortion embedding of metric spaces into the line, and more generally, into the shortest path metric of trees, from the parameterized complexity perspective. Let M = M ( G ) be the shortest path metric of an edge-weighted graph G ,
Michael R. Fellows +5 more
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Parameter-Free Lens Distortion Calibration of Central Cameras [PDF]
2017 IEEE International Conference on Computer Vision (ICCV), 2017 At the core of many Computer Vision applications stands the need to define a mathematical model describing the imaging process. To this end, the pinhole model with radial distortion is probably the most commonly used, as it balances low complexity with a precision that is sufficient for most applications. On the other hand, unconstrained non-parametric
Filippo Bergamasco +4 more
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Influence of turning parameters on distortion of bearing rings [PDF]
Production Engineering, 2007 The turning of bearing rings often leads to undesired form and dimensional changes after heat treatment which are referred to as distortion. In order to investigate the influence of cutting parameters on distortion, external longitudinal turning experiments were conducted.
Lutz Nowag +2 more
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Impact parameter space and transverse distortion [PDF]
Proceedings of XXII. International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2014), 2014 We investigate the GPDs in impact parameter space using the explicit light front wave functions (LFWFs) for the two-particle Fock state of the electron in QED. The Fourier transform (FT) of the GPDs gives the distribution of quarks in the transverse plane for zero longitudinal momentum transfer (ζ = 0).
Dahiya, Harleen, Kumar, Narinder
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Correlation of photophysical parameters with macrocycle distortion in porphyrins with graded degree of saddle distortion [PDF]
Photochemical & Photobiological Sciences, 2010 Different porphyrin conformations are believed to play a role in controlling the cofactor properties in natural tetrapyrrole-protein complexes. In order to study the correlation between macrocycle nonplanarity and physicochemical properties in detail, a series of six porphyrins with graded degree of macrocycle distortion was investigated.
Beate, Röder +3 more
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Multiple comparisons distortions of parameter estimates [PDF]
Biostatistics, 2006 In experiments involving many variables, investigators typically use multiple comparisons procedures to determine differences that are unlikely to be the result of chance. However, investigators rarely consider how the magnitude of the greatest observed effect sizes may have been subject to bias resulting from multiple testing.
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Aural harmonics: Some parameters of distortion [PDF]
The Journal of the Acoustical Society of America, 1979 Subjective-harmonic amplitudes between ears, listeners, and frequencies are basic data relevant to several clinical and theoretical issues. Monaural tone-on-tone masking measurements for the second and third harmonics of 250, 500, and 1000 Hz have been obtained at 75 dB SPL from each ear of 8 subjects with normal bilateral hearing. The estimates of the
T. J. Ayres, T. D. Clack
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Rate-distortion trade-offs in acquisition of signal parameters [PDF]
2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2017 We consider problems where one wishes to represent a parameter associated with a signal source - subject to a certain rate and distortion - based on the observation of a number of realizations of the source signal. By reducing these indirect vector quantization problems to a standard vector quantization one, we provide a bound to the fundamental ...
Miguel R. D. Rodrigues +3 more
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Parameter Interference in Distortion and Alignment Calibration
The Journal of the Astronautical Sciences, 2003 Estimation algorithms are presented for the consistent determination inflight of focal-plane distortion parameters and alignment parameters for attitude sensing instruments. The ambiguity in the specification of the parameter sets is demonstrated and a simple prescription, called SMARTCAL, is given for removing it for the case of polynomial ...
Robert V. F. Lopes, Malcolm D. Shuster
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