摘要:
High-throughput hyperspectral imaging systems (100) are provided. According to an aspect of the invention, a system includes an excitation light source (110); an objective (140) that is configured to image excitation light onto the sample (150), such that the excitation light causes the sample to emit fluorescence light; a channel separator (170) that is configured to separate the fluorescence light into a plurality of spatially dispersed spectral channels; and a sensor (180). The excitation light source (110) includes a light source and a plurality of lenslet arrays. Each of the lenslet arrays is configured to receive light from the light source and to generate a pattern of light, and the patterns of light generated by the lenslet arrays are combined to form the excitation light. The objective is configured to simultaneously image each of the patterns of light to form a plurality of parallel lines or an array of circular spots at different depths of the sample.
摘要:
Zur Feststellung pathologischer Implikationen, z.B. zur Tumordetektion, wird ein hyperspektrales Bild des zu untersuchenden Gewebes in situ aufgenommen und einem Klassifizierungsalgorithmus zugeführt. Das Ergebnis kann auf einem konventionellen Anzeigegerät dargestellt werden oder durch Rückprojektion auf die Oberfläche des untersuchten Gewebes.
摘要:
Die Erfindung betrifft ein Verfahren zur Erfassung, Identifizierung und/oder Authentifizierung von Gegenständen mit mindestens einem Erkennungsmerkmal über hyperspektrale Bildgebung mit mindestens einer Hyperspektralkamera, die nach Anregung des zu untersuchenden Gegenstandes in senkrecht zu einander stehenden Bildebenen, simultan zumindest ein ortsaufgelöstes optisches Analysebild und zumindest ein ortsaufgelöstes hyperspektrales Analysebild des Gegenstandes oder eines Ausschnittes davon, entlang zwei winklig zu einander stehenden Richtungsachsen, aufnimmt, wobei jeder erhaltene Bildpunkt des hyperspektralen Analysebildes spektrale Informationen über Absorptions- und/oder Fluoreszenzeigenschaften der zu dem erhaltenen Bildpunkt korrespondierenden Ortspunkte enthält, und einer Datenverarbeitungseinrichtung, mit welcher die aufgenommenen Analysebilder in kodierte Analysebilder transformiert werden und die kodierten Analysebilder hinsichtlich des Erkennungsmerkmals untersucht werden. Um ein erfindungsgemäßes Verfahren zur sicheren und schnellen Identifizierung und/oder Authentifizierung von Gegenständen mit Erkennungsmerkmalen zu schaffen, wird vorgeschlagen, dass der Gegenstand, oder ein Ausschnitt davon, primäre, sekundäre und/oder tertiäre Erkennungsmerkmale aufweist, und der Gegenstand über einen Ist-Soll-Abgleich mindestens eines Erkennungsmerkmals identifiziert und/oder authentifiziert wird.
摘要:
L'invention concerne un procédé de limitation de la diaphonie dans un capteur d'imagerie, ce capteur se présentant comme une matrice de macropixels définissant une image, chaque macropixel étant formé par une matrice de pixels élémentaires chacun dédié à une bande spectrale distincte, l'ensemble des pixels élémentaires dédiés à une même bande spectrale formant une sous- image, cette image étant décomposée topologiquement en au moins une parcelle, procédé comprenant les étapes suivantes : - mesure 700 de la réponse spectrale de chaque pixel élémentaire λ1, λ.2, λ3,..., λ9, - calcul 701 dans une parcelle de la réponse spectrale moyenne de chaque sous-image, - ciblage 702 pour définir dans cette parcelle la réponse idéale de chaque sous-image, - estimation 703 d'une série de coefficients pour minimiser la diaphonie dans cette parcelle, - application 704 de ces coefficients sur les macropixels pour corriger dans la parcelle les sous-images. Le procédé est remarquable en ce que la réponse idéale est une fonction gaussienne.
摘要:
A multispectral synchronized imaging system is provided. A multispectral light source of the system includes: blue, green and red LEDs, and one or more non-visible light sources, each being independently addressable and configured to emit, in a sequence: at least visible white light, and non-visible light in one or more given non-visible frequency ranges. The system further includes a camera and an optical filter arranged to filter light received at the camera, by: transmitting visible light from the LEDs; filter out non-visible light from the non-visible light sources; and otherwise transmit excited light emitted by a tissue sample excited by non- visible light. Images acquired by the camera are output to a display device. A control unit synchronizes acquisition of respective images at the camera for each of blue light, green light, visible white light, and excited light received at the camera, as reflected by the tissue sample.
摘要:
This disclosure discloses a method of creating a three-dimensional image of a sample using snapshot optical tomography. The method includes generating a plurality of beams incident on the sample simultaneously, acquiring a field image at a plane not conjugate to the sample plane using off-axis digital holography, extracting amplitude data and phase data for the field image, restoring the sharpness by backpropagating the field image using the extracted amplitude and phase data, acquiring a background image, extracting amplitude data and phase data for the background image, and reconstructing a three-dimensional image of the sample with the backpropagated field image and the background image. The method also includes arranging more than one imaging chains to remove the missing angle artefacts in optical tomography. Also disclosed are systems for performing the method.
摘要:
An apparatus for analyzing visible and shortwave infrared light includes an input aperture for receiving light that includes a visible wavelength component and a shortwave infrared wavelength component; a first set of one or more lenses configured to relay light from the input aperture; one or more dispersive optical elements configured to disperse light from the first set of one or more lenses; a second set of one or more lenses configured to focus the dispersed light from the one or more dispersive optical elements; and an array detector configured for converting the light from the second set of one or more lenses to electrical signals that include electrical signals indicating intensity of the visible wavelength component and electrical signals indicating intensity of the shortwave infrared wavelength component.
摘要:
The invention provides an imaging device comprising: a dichroic prism assembly configured to receive light from an object image through an entranceface of the dichroic prism assembly and to disperse said light through at least three exit faces, wherein a first exitface of the dichroic prism assembly is provided with an imaging sensor suitable for visible light and at least a second exit face and a thirdexitface of the dichroic prism assemblyare eachprovided with a hyperspectral imagingsensor. The invention also provides a method for obtaining a hyperspectral image in an imaging device.
摘要:
A hyperspectral optical element for monolithic detectors is provided. In one embodiment, for example a hyperspectral optical element includes a faceplate layer adapted to be mounted on top of a monolithic detector. The faceplate layer comprises a reflective inner surface. A notched layer includes a plurality of notched surfaces and is mounted to the faceplate layer. The notched surfaces oppose the reflective inner surface of the faceplate and define a plurality of variable depth cavities between the reflective inner surface of the faceplate layer and the plurality of notched surfaces of the notched layer. The faceplate layer and the notched layer are substantially transparent to a received signal and the plurality of variable depth cavities provides resonant cavities for one or more wavelengths of the received signal.
摘要:
The invention pertains to a method for transforming a set of spectral images, the method comprising: dividing the images in said set in identically arranged areas; for each of said areas, calculating a predetermined characteristic across said set of images; and, for each of said images, normalizing intensity values in each of said areas in function of said predetermined characteristic of said area. The invention also pertains to a corresponding computer program product and a corresponding image processing system.