Results 261 to 270 of about 913,709 (314)
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Rapid detection of threshold VEPs
Clinical Neurophysiology, 2003To determine whether a one-dimensional (1D) Laplacian analysis detects steady-state visual evoked potentials (ssVEPs) faster than the standard O(z)-F(z) montage and to establish the optimum position of Laplacian reference electrodes.Twenty-two normal adults were shown reversing checks ranging from 1.5' to 60'. Three electrode montages were investigated:
Alison M, Mackay +2 more
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Unimodal thresholding for edge detection
Pattern Recognition, 2008In this paper a novel non-parametric method is proposed for unimodal thresholding in an edge detection context. The proposed method assigns a point in a ROC (receiver operating characteristic) space to each possible threshold without the need of a reference binary image.
Rafael Medina Carnicer +1 more
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Thresholding for change detection
Sixth International Conference on Computer Vision (IEEE Cat. No.98CH36271), 2002Summary: Image differencing is used for many applications involving change detection. Although it is usually followed by a thresholding operation to isolate regions of change there are few methods available in the literature specific to (and appropriate for) change detection. We describe four different methods for selecting thresholds that work on very
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AUTOMATIC THRESHOLDING FOR CORRESPONDENCE DETECTION
International Journal of Image and Graphics, 2004We study the problem of thresholding the residual of template matching as a preprocess for selecting the correct matches between feature points in two images. In order to determine the threshold dynamically, we introduce a statistical model of the residual and compute an optimal threshold according to that model.
Ken-ichi Kanatani, Yasushi Kanazawa
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A model of visual threshold detection
Journal of Theoretical Biology, 1977Abstract A model of visual incremental threshold detection is presented, having the following features. 1. (1) From Crozier's Law we deduce that all thresholds, for conventional as well as for noisy images, are ultimately determined by noise. Other evidence, which is described, supports this conclusion. 2.
G A, Hay, M S, Chesters
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Automatic thresholding for defect detection
Pattern Recognition Letters, 2005Automatic thresholding has been widely used in the machine vision industry for automated visual inspection of defects. A commonly used thresholding technique, the Otsu method, provides satisfactory results for thresholding an image with histogram of bimodal distribution. This method, however, fails if the histogram is unimodal or close to unimodal. For
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The Journal of the Acoustical Society of America, 1999
Detection threshold or recognition differential is defined as the signal-to-noise ratio at the beamformer output required for detection. An introduction to this topic is provided in Uricks’ Principles of Underwater Sound. The subject is frequently a source of confusion due to the multiple possible definitions of signal-to-noise ratio, the effects of ...
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Detection threshold or recognition differential is defined as the signal-to-noise ratio at the beamformer output required for detection. An introduction to this topic is provided in Uricks’ Principles of Underwater Sound. The subject is frequently a source of confusion due to the multiple possible definitions of signal-to-noise ratio, the effects of ...
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Detection of the Anaerobic Threshold by Surface Electromyography
2006 International Conference of the IEEE Engineering in Medicine and Biology Society, 2006This work aims at presenting a method for automatic detection of the anaerobic thresholds by surface electromyography (RMS-slope) and compare with respective values identified by the analysis of ventilatory gas exchange. Thirteen healthy adults were submitted to a single maximal oxygen uptake test, being monitored the ventilatory parameters V(O2), V ...
Roger G. T. Mello +2 more
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Chemical & Engineering News Archive, 1949
Odor is that property of a substance which excites the sense of smell. From a practical standpoint, odor is nasal stimulation caused by certain kinds of molecules dispersed in air, It may be reasoned that odor is a molecular property, for molecular dispersion is the only general type of gaseous dispersion which is possible in air; also, every slightest
E.C. CROCKER, L.B. SJOSTROM
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Odor is that property of a substance which excites the sense of smell. From a practical standpoint, odor is nasal stimulation caused by certain kinds of molecules dispersed in air, It may be reasoned that odor is a molecular property, for molecular dispersion is the only general type of gaseous dispersion which is possible in air; also, every slightest
E.C. CROCKER, L.B. SJOSTROM
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Detectability Threshold for Combination Tones
The Journal of the Acoustical Society of America, 1965Experiments were performed on the detectability threshold for combination tones, defined as the sensation level of primary tones for which combination tones become audible. Investigated were (1) detectability threshold for h−l with (h−l)<<(h+l), where h and l are the frequencies of the higher and lower primary tone, respectively; (2 ...
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