Method and apparatus for correcting crosstalk and spatial...

G - Physics – 01 – N

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G01N 21/84 (2006.01) G01D 3/032 (2006.01) G01N 15/10 (2006.01) G06T 5/00 (2006.01) H04N 5/21 (2006.01)

Patent

CA 2445044

A multichannel imaging system generates an ensemble of images for each field of view of an object (401). Each image in the ensemble is intended to contain information from only one source among a plurality of sources for the object. However, due to crosstalk, at least a portion of the signal from a first source appears in a channel intended for a second source (404). Because the accuracy of the correction will be degraded if the images in an ensemble are spatially misaligned with respect to one another, the spatial offset between images is determined (408) and a correction is applied to substantially eliminate the offset. Then, a correction to the signals is determined to substantially reduce the contributions to the signal in a channel from the signals in other channels. The signal processing can be employed to process the output signals for each of a plurality of different disclosed imaging systems (409).

L'invention concerne un système d'imagerie multicanal produisant un ensemble d'images pour chaque champ de vision d'un objet. Chaque image de l'ensemble est supposée contenir des informations provenant d'une source unique parmi les diverses sources de l'objet. Cependant, en raison de la diaphonie, au moins une partie du signal provenant d'une première source apparaît dans le canal prévu pour une seconde source. En raison de la précision, la correction sera amoindrie si les images d'un ensemble sont mal alignées dans l'espace les unes par rapport aux autres. Le décalage spatial entre les différentes images est alors déterminé et une correction s'applique afin de supprimer quasiment la totalité du décalage. Ensuite, on détermine une correction apportée aux signaux en vue de réduire fortement les contributions apportées au signal dans un canal à partir des signaux dans les autres canaux. Le traitement de signal peut alors servir à traiter les signaux générés pour chacun des systèmes d'imagerie décrits par la présente invention.

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