Abstract:
A method for processing images acquired in real time through a medical device, said images being loaded into a buffer, comprising the steps of : stopping the loading of the images into the buffer, processing loaded images using an incremental algorithm, displaying successively intermediate results of the processing, resuming the loading and stopping the processing based on an evaluation of said intermediate results.
Abstract:
A method to process an image acquired through an optical-fiber guide includes acquiring a first reference image through the optical-fiber guide, acquiring a second calibration image through the optical-fiber guide, spatially identifying each fiber of the optical-fiber guide of the second calibration image in a first detection map, acquiring a recalibration image through the optical-fiber guide, determining a geometrical transformation to make the recalibration image coincide with the first reference image, deriving a new detection map spatially identifying each fiber of the optical-fiber guide of the recalibration image, wherein the new detection map is derived using the geometrical transformation and the first detection map, and individually processing zones of an acquired image corresponding to each fiber of the optical-fiber guide using the new detection map.
Abstract:
Un método para procesar una imagen (500) adquirida a través de una guía de fibra óptica, el método que comprende: adquirir una imagen de recalibración (401) a través de la guía de fibra óptica; determinar una transformación geométrica (402) para hacer coincidir la imagen de recalibración (401) con una primera imagen de referencia derivada de una primera imagen adquirida a través de la guía de fibra óptica en una etapa preliminar (3); derivar a partir de la transformación geométrica (402) y a partir de un primer mapa de detección (302) almacenado que identifica espacialmente cada fibra de la guía de fibra óptica en una segunda imagen de calibración (301) adquirida en la etapa preliminar (3), un nuevo mapa de detección (421) que identifica espacialmente cada fibra de la guía de fibra óptica en la imagen de recalibración (401); y procesar zonas individualmente de la imagen adquirida (500) que corresponden a cada fibra de la guía de fibra óptica usando el nuevo mapa de detección (421).
Abstract:
The method involves performing a set of acquisitions across an image guide (1). Each acquisition is performed for a given spatial offset at a distal end of the guide with respect to an optical head. Each acquired data is transformed in a scatter diagram and each diagram is readjusted with respect to a reference scatter diagram. A final image is reconstructed by superimposing readjusted diagram. Independent claims are also included for the following: (A) a device for enhancing resolution of confocal image acquired across an image guide (B) a system implementing confocal image resolution enhancing method.
Abstract:
L~invention concerne un procédé pour augmenter la résolution d~images confocales acquises à travers un guide d~image dont l~extrémité distale est associée à une tête optique pour focaliser le faisceau laser émis par le gui de d~image dans un objet d~observation. Selon l~invention, pour une position donnée de la tête optique, ce procédé comprend les étapes de : réalisation d~une pluralité d~acquisitions à travers le guide d~image, chaque acquisitio n étant réalisée pour un décalage spatial donné de ladite extrémité distale du guide d~image par rapport à la tête optique qui reste fixe ; transformation des données de chaque acquisition en un nuage de points ; recalage de chaque nuage de points par rapport à un nuage de points pris comme référence ; superposition des nuages de points ainsi recalés ; et reconstruction d~une image finale à partir de cette superposition. Avantageusement, on utilise un tube piézoélectrique commandé disposé autour de l~extrémité distale du guide d~image pour déplacer ce dernier.
Abstract:
The method involves performing a set of acquisitions across an image guide (1). Each acquisition is performed for a given spatial offset at a distal end of the guide with respect to an optical head. Each acquired data is transformed in a scatter diagram and each diagram is readjusted with respect to a reference scatter diagram. A final image is reconstructed by superimposing readjusted diagram. Independent claims are also included for the following: (A) a device for enhancing resolution of confocal image acquired across an image guide (B) a system implementing confocal image resolution enhancing method.
Abstract:
Equipment includes an image guide ( 1 ) consisting of flexible optical fibers with: on the proximal end side: a source ( 2 ), angular scanning elements ( 3 ), injection elements ( 4 ) in one of the fibers, elements for splitting ( 5 ) the illuminating beam and the backscattered signal, elements for spatial filtering ( 6 ), elements for detecting ( 7 ) the signal, electronic elements ( 8 ) for controlling, analyzing and digital processing of the detected signal and display; and on the distal end side: an optical head ( 9 ) for focusing the illuminating beam exiting from the illuminated fiber. The scanning elements include a resonant line mirror (M 1 ) and a galvanometric field mirror (M 2 ) with a variable frequency and two afocal optical systems adapted to conjugate the two mirrors (M 1 , M 2 ) firstly in the field mirror (M 2 ) and the injection elements ( 4 ) in the image guide in a second step.
Abstract:
Equipment includes an image guide ( 1 ) consisting of flexible optical fibers with: on the proximal end side: a source ( 2 ), angular scanning elements ( 3 ), injection elements ( 4 ) in one of the fibers, elements for splitting ( 5 ) the illuminating beam and the backscattered signal, elements for spatial filtering ( 6 ), elements for detecting ( 7 ) the signal, electronic elements ( 8 ) for controlling, analyzing and digital processing of the detected signal and display; and on the distal end side: an optical head ( 9 ) for focusing the illuminating beam exiting from the illuminated fiber. The scanning elements include a resonant line mirror (M 1 ) and a galvanometric field mirror (M 2 ) with a variable frequency and two afocal optical systems adapted to conjugate the two mirrors (M 1 , M 2 ) firstly in the field mirror (M 2 ) and the injection elements ( 4 ) in the image guide in a second step.
Abstract:
L'invention concerne un procédé pour mesurer la vitesse d'une particule telle un globule rouge en mouvement au sein d'un écoulement, tel qu'un flux sanguin, à partir d'un microscope à balayage lumineux, ce procédé comprenant les étapes suivantes :- acquisition d'une image par balayage lumineux en x et y d'un plan contenant ledit objet;- détection dans le plan (x, y) d'une strie engendrée par le déplacement dudit objet lors de l'acquisition de ladite image;- détermination de la pente de ladite strie dans le plan (x, y);- estimation de la vitesse Vg dudit objet à partir de la pente ainsi déterminée.