Abstract:
A spectral bio-imaging method for enhancing pathologic, physiologic, metabolic and health related spectral signatures of an eye tissue, the method comprising the steps of: (a) providing an optical device for eye inspection being optically connected to a spectral imager; (b) illuminating the eye tissue with light via the iris, viewing the eye tissue through the optical device and spectral imager and obtaining a spectrum of light for each pixel of the eye tissue; and (c) attributing each of the pixels a color or intensity according to its spectral signature, thereby providing an image enhancing the spectral signatures of the eye tissue.
Abstract:
Zur visuellen Darstellung einer in elektronischer Form in einem Rechner vorliegenden Bildinformation auf einer Projektionsfläche werden die im Rechner (R) gespeicherten, die Bildinformation in einem Farbraum repräsentierenden Bilddaten in Form eines Videodatenstroms einer elektronischen Projektionseinrichtung (B) zugeführt. Diese erzeugt daraus entsprechende optische Signale erzeugt und projiziert diese auf die Projektionsfläche (L). Die Projektionseinrichtung (B) wird in ein Color Management System mit einbezogen. Dazu wird ein die Transfercharakteristik mindestens der Projektionseinrichtung (B) selbst beschreibendes Ausgabeprofil erzeugt. Anhand dieses Ausgabeprofils werden dann die Bilddaten nach den Prinzipien des Color Managements in den gerätespezifischen Farbraum der Projektionseinrichtung transformiert. Zur Profilerstellung wird in Verbindung mit einer Profilerstellungssoftware ein Lichtmessgerät (M) verwendet, welches entweder das von der Projektionseinrichtung emittierte oder vorzugsweise das von der Projektsfläche remittierte Licht erfasst und die dabei erzeugten Messdaten in die Profilerstellungssoftware einspeist.
Abstract:
A hand-held produce data collector which captures wavelength information from a produce item. The produce data collector includes a light emitter for illuminating a produce item, collecting optics for collecting light reflected from the produce item and separating the reflected light into a plurality of wavelength portions of light, a photosensor for capturing wavelength information from the wavelength portions of light, control circuitry, and a hand-held housing containing the light emitter, the collecting optics, the photosensor, and the control circuitry. The control circuitry may store reference wavelength information and compare the captured wavelength information to the reference wavelength information to identify the produce item.
Abstract:
A produce recognition system which identifies a produce item by comparing its color and texture information along a spatial area with reference information. The system includes a produce shape data collector including a light source for illuminating a produce item with light, a spectrometer which produces an image having a wavelength dimension and a spatial dimension from light reflected from the produce item, an image capture device which captures discrete wavelengths within the reflected light along the spatial dimension of the image and which produces an electrical signal, and control circuitry for controlling the light source and the image capture device and for digitizing the electrical signal. The system further includes a computer which determines color and texture information along the spatial dimension in the electrical signal and compares the color and texture information with reference information to identify the produce item.
Abstract:
A method of detecting the colour of an article such as gambling chips to permit the different colour chips to be sorted. The method comprises sensing the colour of the article at a plurality of places thereon by moving the article relative to colour sensing means, and integrating the colour measured with respect to time.
Abstract:
A rendering apparatus includes: a radiant-energy calculating device for determining a spectral radiance for each infinitesimal area of an object by using a spectral radiance of a light source irradiating the object, a spectral reflectance in the infinitesimal area of the object, and a spectral reflectance factor in a wide area of the object; a color-specification-value calculating device for calculating color specification values of a colorimetric system on the basis of the spectral radiance obtained for each infinitesimal area; a transforming device for transforming the color specification values into image data for displaying an image of the object; and a display device for displaying the image of the object on the basis of the image data.
Abstract:
A portable colorimeter for characterizing the optical properties of a colored surface and in particular a colored surface containing metallic or pearlescent particles, which employs three multiangular spectrophotometric measurements to derive color constants for the surface. The colorimeter is a compact integrated unit housing irradiation, detection, control, analysis and display means and employs three illumination angles, preferably -30°, O°, and 65°, and one detection angle, preferably 45°, all measured from the sample normal. The method includes determining the tristimulus values of the color of the sample surface from low resolution spectral reflectance data preferably using twelve detector elements.
Abstract:
The invention makes it possible to determine the colour to be given particularly to a dental prosthesis from the measurement of the colour of adjacent teeth in the mouth of the patient. An optical fiber instrument (44) senses the light reflected by a tooth (50) and transmits the light to the input of a spectrocolorimeter (12, 14) associated with a microprocessor (10) in order to determine the spectral reflectance diffused by the tooth and to calculate the trichromatic components of its apparent colours for various types of lighting. The invention applies particularly to the determination of colours of dental prostheses.
Abstract:
In an optical instrument for spectroscopically measuring color and gloss of a sample surface, a fiber optic probe is provided wherein light is transmitted from a light source to the probe through a fiber optic bundle. The fiber optic bundle is arranged to illuminate a surface positioned over an aperture in the probe. Light diffusely reflected from the sample surface is transmitted by a second fiber optic bundle to a spectrophotometer. A small fiber bundle is arranged in the probe to irradiate the surface of the sample at an angle of 60 degrees and a second small fiber bundle is arranged to receive light from the first mentioned small fiber bundle after being specularly reflected from the surface. The second fiber optic bundle transmits the received light to a photodetector in the spectrophotometer to provide an indication of the gloss of the sample surface.