Abstract:
An object of the present invention is to provide a spectral characteristic measuring system, a spectral characteristic measuring instrument, a data processing apparatus, and a program, which make it possible to appropriately correct an influence of an illumination light variation caused by a temperature rise in a semiconductor light-emitting element due to light emission, in a scanning type color measurement system or the like which sequentially measures many color samples 1n and in which a semiconductor light-emitting element such as an LED is used as a light source and a reference system is not provided.Spectral distributions of illumination lights which are measured before and after the color sample is measured are interpolated, to thereby estimate a spectral distribution of an illumination light at the time when a spectral distribution of the color sample is obtained. Spectral characteristics of the color sample are identified based on the spectral distribution of the reflected light or the transmitted light reflected by or transmitted through the color sample and the estimated spectral distribution.
Abstract:
An image processing system is used for dentistry. Upon creating a false tooth of a patient (59), a plurality of illuminating light of LEDs with different wavelengths emit light and a photographing apparatus (1A) photographs a tooth portion of the patient (59), thereby obtaining image data. The image data is sent to a dentistry filing system (2A) serving as a processing apparatus, and color reproducing data is obtained by calculation. The color reproducing data is sent to a dentistry factory (55) via a public line. Data is searched from a database (56) for calculating a ceramic compounding ratio, compound data of the ceramic false tooth is obtained, matching the color of the tooth portion of the patient (59), and the false tooth approximate to the tooth color of the patient (59) is created.
Abstract:
A color analysis system includes a plurality of light sources configured to illuminate a test patch. A sensor is configured to receive light from the plurality of light sources reflected from the test patch. A controller is configured to determine the color of the test patch in response to light received by the sensor reflected from the first light source, and adjust the color determination in response to light received by the sensor reflected from the first and second light sources.
Abstract:
The image processing system is applied to dentistry, for example, and performs photography of the teeth of a patient while causing a plurality of illumination light LEDs of different wavelengths to emit light by means of a photography device when producing a crown repair or denture of the patient, whereby image data are acquired. The image data are transmitted to a dental filing system constituting a processing device where color reproduction data are determined through computation. In addition, color reproduction data are transmitted to the dental technician's office via a public switched network. Therefore, a repair material compound ratio calculation database is searched and the compound data for a material that matches the hue of the patient's teeth are found, whereby a crown repair or denture or the like that very closely matches the color of the patient's teeth is produced.
Abstract:
Embodiments include an apparatus including a color sensor including a transmitter portion and a receiver portion, the transmitter portion including a light source operable to generate and transmit a light having a particular range of wavelengths, the receiver portion including a first detector operable to receive a first portion of the light emitted from the transmitter portion and to measure a luminance of the received first portion of the emitted light, and a second detector including a polarization filter, the second detector operable to receive a second portion of the light emitted from the transmitter after the second portion has passed through the polarization filter, and operable to measure a pure color of the received second portion of transmitted light.
Abstract:
A color measurement instrument and color measurement method for measuring a color of a surface are provided. The instrument includes a plurality of independently switchable light sources characterized by differing spectral ranges, and a plurality of light guides configured to receive light from the light sources and to direct the received light to a light emitting portion of the instrument for illuminating the surface. The instrument further includes a first light detector configured to receive a portion of the light reflected from the surface. The first light detector is a wideband light detector.
Abstract:
Provided is a device for determining the surface topology and associated color of a structure, such as a teeth segment, including a scanner for providing depth data for points along a two-dimensional array substantially orthogonal to the depth direction, and an image acquisition means for providing color data for each of the points of the array, while the spatial disposition of the device with respect to the structure is maintained substantially unchanged. A processor combines the color data and depth data for each point in the array, thereby providing a three-dimensional color virtual model of the surface of the structure. A corresponding method for determining the surface topology and associated color of a structure is also provided.
Abstract:
The invention relates to a device for measuring dental shade comprising: —illumination means (24, 40, 42, 44, 48, 50), for successively illuminating at least one part of a tooth (D) with light of various spectral ranges, —at least one sensor (26) sensitive to light coming from said tooth part, in response to the illumination, to generate for each different color of illumination, at least one measurement signal, —means (30, 32) for converting the measurement signals corresponding to said tooth part, into the coordinates of a measurement point (202), in a shade space in which “reference” points (320, 410, 540) are also defined, corresponding to the preset shades of a dental shade guide, and—search means (114), for the tooth part, for a shade corresponding to the reference point closest to the measurement point, in the shade space.
Abstract:
A spectrophotometer includes a plurality of LEDs arranged in a circular array, each having a calibrated power input determined by the use of pulse width modulation and each having a unique wavelength band determined by the utilization of a unique fluorescent phosphor coating or lens. At least one of the LEDs comprising a phosphor-free high energy UV LED. Light reflected to the spectrophotometer is divided into predetermined wavelength ranges through the utilization of a linear variable filter and photo detectors wherein the analog signal from a photo detector is converted to a digital value through the use of auto-ranging gain technique.
Abstract:
The present invention relates generally to a methodology of maintaining correlated colour temperature (CCT) of light beam from lighting means by having a processing means to instruct several lighting means groups, wherein each group has different CCT ranges, that are arranged together, to provide light beam of intended CCT, if the CCT of light beam from the lighting means that are reflected back using reflecting means, which are captured and converted to binary data by the sensory means are different from the intended CCT.