Multiple motions from instantaneous frequency

Multiple motions from instantaneous frequency

The measurement of multiple velocities using phase-based methods is discussed. In particular, phase gradients (instantaneous frequency) from different bandpass channels (quadrature filter outputs) are used to estimate multiple image velocities in a single neighborhood. The approach is similar to tha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Langley, K., Fleet, D.J., Atherton, T.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Band pass filters
Computer science
Educational institutions
Equations
Focusing
Frequency measurement
Motion estimation
Phase measurement
Psychology
Velocity measurement
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Beschreibung
Zusammenfassung:The measurement of multiple velocities using phase-based methods is discussed. In particular, phase gradients (instantaneous frequency) from different bandpass channels (quadrature filter outputs) are used to estimate multiple image velocities in a single neighborhood. The approach is similar to that of M. Shizawa and K. Mase (1990) in which nth-order differential operators are required to compute n simultaneous velocity estimates. However, to use instantaneous frequency, the output of each channel must be differentiated only once.< >
ISSN:1063-6919
DOI:10.1109/CVPR.1992.223242