Zobrazeno 1 - 10
of 35
pro vyhledávání: '"R.E. Fredericksen"'
Publikováno v:
Vision Research, 36(15), 2333-2336. Elsevier
We measured directional sensitivity to a foreground pattern while an orthogonally directed background pattern was present under transparent motion conditions. For both foreground and background pattern, the speed was varied between 0.5 and 28 deg sec
Publikováno v:
Vision Research. 34:3171-3188
The combination of visual motion information over visual space (spatial summation) and stimulus duration (temporal integration) was investigated using a random-pixel array § (spatiotemporally broad-band) apparent motion stimulus designed to isolate
Publikováno v:
Vision Research. 34:1149-1155
Following a period of adaptation to a pattern moving in a particular direction, a subsequently viewed stationary pattern appears to move in the opposite direction for some time: the movement after effect (MAE). The MAE lasts longer when the test patt
Publikováno v:
[1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society.
Multiscale geometric image structure analysis is used to produce a hierarchical labeling of image regions. The regions provide a language for fast, interactive object definition. The approach allows human analysts to quickly inject semantics into the
Publikováno v:
[1990] Proceedings of the First Conference on Visualization in Biomedical Computing.
The medical image object definition method, which involves automatic computation of a region-based image description, along with a region containment directed acyclic graph (RCDAG) induced from the description by multiscale analysis of image structur
Publikováno v:
[1990] Proceedings of the First Conference on Visualization in Biomedical Computing.
The algorithms used in computing the intensity axis of symmetry (IAS) for 2D and 3D medical images are described. The basic 2D algorithms, along with the algorithms needed to incorporate scale space, are described. A brief discussion of the extension
Publikováno v:
[1990] Proceedings of the First Conference on Visualization in Biomedical Computing.
The authors describe an image analysis that provides a quasi-hierarchy of image regions in terms of which humans can quickly build object regions by an interactive approach. This hierarchy is generated by the ridge structure of the intensity surface
Publikováno v:
Vision research. 34(23)
We present a model for the temporal integration of apparent motion information. The model is constructed by considering psychophysical and neurophysiological data, and consists of the leaky integration of pulsatile motion detector responses to appare
Publikováno v:
Vision research. 34(4)
Human motion perception is assumed to be functionally described by an array of bi-local detectors feeding later, higher order computational stages. Using this model as a guide, improvement of spatio-temporal displacement sensitivity by temporal integ
Publikováno v:
Vision research. 33(9)
A bi-local detector array model was assumed to describe the functional performance of monocular motion perception. Distributions of model parameters were measured in human vision at several positions in the visual field. The stimulus paradigm was des