Radiant Imaging, Inc.

Microsoft Technology Licensing, LLC

Genlyte Thomas Group, LLC

Radiant Imaging, Inv.

David R Jenkins

Matthew Lekson

Robert J Riffel

Glenn Eric Bailey

An interactive display system that includes an interactive display screen. An illuminator is positioned to illuminate one of the inner or outer surfaces of the display screen. At least two cameras are placed so as to view the illuminated surface of the display screen. Each of at least one of the cameras are positioned such that specular reflections from the illuminator are received by the camera. The images from the different cameras are merged to form a merged image in which specular reflections are reduced or even cancelled.

Specular reflection reduction using multiple cameras

Systems and methods for applying different color calibrations at different locations in an imaging photometer measurement are disclosed herein. In one embodiment, a method for measuring a light source having a first area with a first spectral distribution and a second area having a second spectral power distribution can include selecting one or more data points in the first area for measurement. The method then includes applying a calibration to the selected data points in the first area such that a desired colorimetric result is displayed for each data point in a single colorimetric measurement of the first area. In several embodiments, the method can further include selecting one or more data points in the second area, and applying a different calibration to the selected portions of the second area such that a desired colorimetric result is also displayed for each data point in the second area.

Methods and apparatuses for applying different color calibrations at different locations in an imaging photometer measurement

A color calibration method for an imaging color measurement device utilizes a detector array, a plurality of optical elements, and multiple instances of irradiation of the detector array for a single measurement. A flat-fielding correction error correction matrix of the imaging color measurement device for each instance of irradiation of the detector array is obtained prior to color calibration. The response for each instance of irradiation of the detector array is flat-fielded with the corresponding error matrix to obtain a flat-fielded, spectrally weighted irradiance response for each instance of irradiation of the detector array. An illuminant light source with known spectral output or chromaticity coordinates is measured to obtain an irradiance response of the imaging color measurement device for each instance of irradiation of the detector array. A color correction coefficient is calculated using the known spectral output and chromaticity coordinates of the light source and the corresponding flat-fielded irradiance response.

Color calibration method for imaging color measurement device

A multi-point calibration method is provided for an imaging light and color measurement device. A light emitting surface with a plurality of light emitting areas is provided. The luminance or color of each light emitting area of the light emitting surface at a specific angle is measured using a spot measurement instrument. By aligning the spot measurement instrument with one of the light emitting areas at a time, the luminance or color of the light emitting areas of the light emitting surface is measured. A measurement of the light emitting surface is made with the imaging light and color measurement device. A matrix of correction factors is calculated to correct the areas as measured by the imaging light and color measurement device to be equivalent to those measured by the spot photometer. While a display device is measured by the imaging light and color measurement device, the measured luminance or color values thereof are corrected by the screen gain correction matrix.

Multi-point calibration method for imaging light and color measurement device

A fully recessed unit equipment luminaire for providing emergency lighting to a path of egress. The luminaire has batteries, a battery box, a housing, a charger/emergency switching circuit mounted on a chassis, lamps, reflector assemblies, and a cover. The luminaire may be configured for either wall or ceiling mounting with the use of wall or ceiling mount lenses, respectively. Reflector assemblies supporting the lamps are rotatably engaged by the cover. Each reflector assembly has a substantially semi-frustoconical shape and intersects the lamp's conical shaped beam of light to redirect the beam into a narrow, elongated pattern. The reflector assemblies may have a plurality of planar reflecting surfaces which approximate the semi-frustoconical shape.

Growing community of inventors

Chapel Hill, NC, United States of America

David R Jenkins