Abstract:
A method of adjusting the voltage applied across the pixels of an OLED display to compensate for aging including measuring the accumulation of trapped positive charge to produce a signal representative of such accumulation, and responding to such signal to adjust the voltages applied across the pixels of the OLED to compensate for aging.
Abstract:
A method for reducing the power used by a display device having light emitting pixels, includes the steps of: receiving formatted information for presentation on the display device; modifying the format of the formatted information to reduce the number and/or intensity of bright pixels in a display of the formatted information; rendering the modified formatted information; and displaying the rendered modified formatted information on the display device.
Abstract:
Spectrometer apparatus for calibrating a color image scanner includes an opaque member, having an optical slit, movable into position on an optical axis of the scanner between its polychromatic light source and its lens in a plane occupied by a color image when it is scanned. A diffraction grating is similarly movable onto the optical axis between the slit and the lens. By having the grating in proximity to the slit, the opaque member and the grating can be part of a single assembly that can be easily moved into the optical axis in a convenient location near the scanning plane of the image scanner. The light source illuminates the slit and the diffraction grating disperses duplicate spectra off-axis across respective halves of the image sensor, from which data is obtained for calibration.
Abstract:
Spectrometer apparatus, for self-calibrating a color image scanner of the line scanner or area scanner type, comprises a member, having an optical slit, movable into position on an optical axis of the scanner between its polychromatic light source and its focusable lens in a plane occupied by a color image when it is scanned. A diffraction grating is similarly movable onto the optical axis, a given distance from an image sensor of the scanner. The light source illuminates the slit and the diffraction grating disperses transmitted polychromatic light according to its wavelength, forming duplicate spectra off-axis across respective halves of the image sensor, with longer wavelengths being diverted to respectively higher angles.
Abstract:
An intra-oral camera has a projector that is energizable to emit patterned illumination and an imaging sensor that is energizable to obtain image content. An inertial motion sensing element provides signals indicative of acceleration of the intra-oral imaging apparatus along at least one axis. A processor is in signal communication with the projector, the imaging sensor, and the inertial motion sensing element and is configured to initiate image acquisition according to signals obtained from the inertial motion sensing element.
Abstract:
A method and apparatus for generating a color mapping for a dental object. The method includes generating a transformation matrix according to a set of spectral reflectance data for a statistically valid sampling of teeth. Illumination is directed toward the dental object over at least a first, a second, and a third wavelength band, one wavelength band at a time. For each of a plurality of pixels in an imaging array, an image data value is obtained, corresponding to each of the at least first, second, and third wavelength bands. The transformation matrix is applied to form the color mapping by generating a set of visual color values for each of the plurality of pixels according to the obtained image data values and according to image data values obtained from a reference object at the at least first, second, and third wavelength bands. The color mapping can be stored in an electronic memory.
Abstract:
A method and apparatus for obtaining a color mapping of a dental object. Illumination is directed toward the object over at least a first and second wavelength band, one band at a time. An image of the dental object is captured at each wavelength band to form a set of images of the dental object. For pixels in the captured set of images, an image data value for the pixel corresponds to each of the wavelength bands and calculates interpolated image data values proportional to the spectral reflectance of the dental object, according to the obtained image data values and according to image data values obtained from a reference object at the wavelength bands. Spectral distribution data for a viewing illuminant is obtained and the visual color of the dental object reconstructed according to the calculated interpolated image data values and the obtained spectral distribution of the viewing illuminant.
Abstract:
A system for monitoring the life cycle of an electronic apparatus of the type that creates an output data record such as an exposed photographic film, or a digital data, sound or image file, includes a sensor in the electronic apparatus for monitoring the operation and condition of the apparatus to produce operational data; means in the electronic apparatus for appending the operational data to the data record; a data record utilization device that receives and operates on the data record; and a digital processor in the data record utilization device having a software agent that retrieves the operational data from the data record, processes the operational data and produces a message related to the life cycle of the product.
Abstract:
A single integrated circuit device is disclosed that is capable of selectively functioning in real time as either a sequential matrix multiplier, a parallel matrix multiplier, a convolver or a finite input response FIR filter in order to process image data. A core group of multipliers is used to provide the basic multiplication operation that is common to each of the desired image processing functions. Input data router unit, coefficient router units and an output data router unit are responsive to mode selection control signals, supplied to a mode selection port, to route the appropriate input data and coefficients to the core group of multipliers and to route the output of the adders to the correct output port(s) for each of the desired processing functions.
Abstract:
Apparatus and a method for digitizing an image having a high dynamic range is disclosed. The apparatus includes a solid-state image sensor having at least two linear charge-coupled device arrays thereon. Means is provided to pass the image across the image sensor to be sensed by all of the arrays in a single pass. A light source is provided to direct light from the image onto the arrays. The arrays are provided with means to adjust the arrays so that at least one array is sensitive to low optical densities and at least one array is sensitive to high optical densities. The output signals from the arrays are feed to analog-to-digital converters to convert the signals therefrom to digital form. The digital signals are fed to a computer which combines the signals into a single signal corresponding to the image.