Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-08-15
2006-08-15
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S208100, C250S330000, C382S274000, C340S952000
Reexamination Certificate
active
07091468
ABSTRACT:
The invention relates to devices for processing images making it possible to identify, to process and to select discrete light sources present in a video image composed of pixels. The aim is the presentation, in real time, to a user of a processed image allowing better recognition of light sources in a weakly contrasted image. In aeronautical use, this device affords a landing aid by allowing better recognition of runway lamps in conditions of degraded visibility, in particular in foggy weather. The invention relies on three major principles: 1) the main processing of images is performed only on a small number of pixels whose level is greater than a threshold; 2) a likelihood estimator evaluates the probability of existence of sources in the image; 3) the threshold is variable as a function of a certain number of parameters of the image.
REFERENCES:
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patent: 6232602 (2001-05-01), Kerr
patent: 0604245 (1994-06-01), None
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Breton Pierre-Albert
Rols Olivier
Lowe Hauptman & Berner LLP
Pyo Kevin
Thales
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