Abstract:
The invention relates to a device which can recognise the colour of an object and which can be used to obtain good resolution over the entire spectrum and a reproducible result regardless of the type of surface and whether or not it is textured. According to the invention, the device comprises: a photodiode (13) which is divided into three different sections or three photodiodes, each of which is equipped with filters through which only one of the base colours can pass, i.e. red, green and blue, and which supply three electric signals that are representative of the red, green and blue components of the colour of the object; a variable-gain amplifier (16) and a microcontroller (17) which is programmed, for example, to control same such that it applies an independent, variable, automatic amplification to each signal originating from the photodiode (13).
Abstract:
L'invention concerne un dispositif de reconnaissance de la couleur d'un objet permettant d'obtenir une bonne résolution sur l'ensemble du spectre et un résultat reproductible, quel que soit le type de surface, texturée ou non. Selon l'invention, le dispositif comporte une photodiode (13) divisée en trois secteurs distincts ou trois photodiodes, munis chacun de filtres laissant passer seulement l'une des couleurs de base, rouge, verte et bleue, et fournissant trois signaux électriques représentatifs des composantes rouge, verte et bleue de la couleur de l'objet, un amplificateur (16) à gain variable et un microcontrôleur (17) programmé, notamment, pour le commander de manière à ce qu'il applique, à chaque signal provenant de la photodiode (13), une amplification variable, indépendante et automatique.
Abstract:
A system for authenticating sampled objects including a database, a plurality of spectrum measuring devices, and a plurality of computers. The database stores a plurality of reference patterns measured from known reference objects. Each of the spectrum measuring devices measures a region of respective sampled objects so as to produce spectral content information identifying the sampled objects. The spectral content information includes information indicative of colors inside the visible spectrum of the human eye. The computers have access to spatial analysis software. The computer receives the spectral content information identifying the sampled object and provides the spectral content information to the spatial analysis software to generate a unique measured pattern. The spatial analysis software compares the unique measured pattern with the reference patterns stored in the database, and outputs signals indicative of matches between the unique measured pattern with the reference pattern within a tolerance level whereby the colors of the regions of the sampled objects are utilized to authenticate the sampled objects.
Abstract:
A device comprising an illumination means and a light sensing means, that can examine and memorize a discrete color of an object based on the magnitude of the reflected light bouncing off of the colored surface in at least three areas of the electromagnetic spectrum. The device also provides output as a visually and/or audibly perceptible signal for deciphering the color. The color range identified by the device is not limited to the visible spectrum and may include infra-red and ultra-violet light. A storage means for memorizing colors may also be included in the device. Applications of ColorStick technology may include children's toys, aids for the visually handicapped (e.g. blind or color blind individuals), designers, internet shoppers, gardeners, etc.
Abstract:
An image processing system which is applicable to, in this case, a dental treatment, and which images, when a patient' (59) denture is to be produced, the dental part of the patient (59) while a plurality of lighting LEDs respectively having different wavelengths are being emitted by an imaging device (1A) to capture image data. The image data is transmitted to a dental filing system (2A) serving as a treating device, where color reproduction data is determined by computing. The color reproduction data is further sent to a dental laboratory (55) over a public telephone line. In the laboratory, a porcelain blending ratio calculation database (56) is searched to obtain denture porcelain blending data that matches the hue of the dental part of the patient (59), whereby a denture very close in color to the patient' (59) teeth is produced.
Abstract:
L'invention concerne un appareil de mesure de colorimétrie dentaire comportant : - une source lumineuse blanche, - des moyens permettant de projeter le flux lumineux émis par la source sur une dent à mesurer, - des moyens de collecte du flux diffusé par ladite dent, - des moyens de sélection spectrale du flux diffusé, - des moyens de mesure des flux lumineux spectralement sélectionnés, - des moyens de traitement du résultat de ces mesures permettant le classement de la dent mesurée par rapport à un nuancier. L'appareil comporte un ensemble d'émission et de réception et une tête de mesure venant au contact de la dent à mesurer, la tête de mesure étant reliée à l'ensemble d'émission-réception par un faisceau de fibres optiques. La tête de mesure comporte un commutateur électrique déclenché par la pression de la tête sur la dent et commande la mesure.
Abstract:
A system for controlling a RBG based LED luminary which tracks the tristimulus values of both feedback and reference whereby the forward currents driving the LED luminary are adjusted in accordance with the errors between the feed tristimulus values and the reference tristimulus values until the errors are zero.
Abstract:
An optical sensor system is provided which provides portions of the intensity spectrum of various types of natural and artificial light and combinations thereof. The illumination passes through a series of bandpass filters (116A to 116E, 228, 232) or through a diffraction grating (152, 234) to be sensed by a plurality of photosensors (110A to 110E) sensing different portions of the spectrum. The photosensors (110A to 110E) are connected to a processing system (124) which can determine the nature of the illuminants from characteristic areas of the intensity spectrum falling on the photosensors (110A to 110E). A camera (210) is provided which has an optical sensor which can respond to natural, artificial light, and a combination thereof by bandpass filtering or spectrum diffraction and electronic processing to allow compensation for color differences in an image taken by the camera caused by the illumination.