Membrane Computing by Thomas Hinze & Grzegorz Rozenberg & Arto Salomaa & Claudio Zandron

Author:Thomas Hinze & Grzegorz Rozenberg & Arto Salomaa & Claudio Zandron
Language: eng
Format: epub
ISBN: 9783030127978
Publisher: Springer International Publishing

3 Brightness Constancy Equation

Optic flow methods [5, 9] map the location of each pixel in one frame to a pixel in a successor frame by comparing their brightness intensities E expressed by real-valued numbers and considering a surrounding intensity pattern. As the brightness constancy assumption proposes, for small enough motions there is a pixel in the frame under study which matches exactly with a pixel from the predecessor frame. Coloured pixels need to be mapped into their grey scale value relatively to each other. Formally, the brightness constancy assumption reads:

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