Abstract: A method, system and reference target for estimating spectral data on a selected one of three spectral information types is disclosed. Spectral information types comprise illumination of a scene, spectral sensitivity of an imager imaging the scene and reflectance of a surface in the scene. The method comprises obtaining a ranking order for plural sensor responses produced by the imager, each sensor responses being produced from a reference target in the scene, obtaining, from an alternate source, data on the other two spectral information types, determining a set of constraints, the set including, for each sequential pair combination of sensor responses when taken in said ranking order, a constraint determined in dependence on the ranking and on the other two spectral information types for the respective sensor responses and, in dependence on the ranking order and on the set of constraints, determining said spectral data that optimally satisfies said constraints.

Abstract: An image-capturing device includes an image-capturing unit that generates image data, a color information acquisition unit that obtains color information from the image data, a determination unit that determines whether the image data have been generated by underwater photography or onshore photography, an underwater color balance reference setting unit that sets an underwater color balance reference that serves as a color correction reference when color correction is performed on image data picked up underwater, an underwater color correction data calculation unit that calculates underwater color correction data on the basis of the color information and the underwater color balance reference in a case where the determination unit determines that the image data have been generated by underwater photography, and a color correction unit that performs color correction on the image data generated by underwater photography on the basis of the underwater color correction data.

Abstract: A system is disclosed for controlling operation of an electronic device, such as a TV. The system includes a first sensor located at or near the electronic device and a second sensor spaced apart from the first sensor, wherein the first and second sensors are configured to detect motion of a user within an operating zone associated with the electronic device. A processor is coupled to the electronic device and the first and second sensors, the processor being configured to input a signal from the first and second sensors. Memory is coupled to the processor, the memory comprising a sensing algorithm configured to process the input signal from the first and second sensors and determine the location of the user with respect to the operating zone. The processor is configured to send a control command to the electronic device based on an output of the sensing algorithm.

Abstract: A lighting unit that optimizes an oscillation frequency for oscillating a diffusion device and its amplitude amount and a projecting display using the lighting unit are provided. Driving of a light source driving unit is controlled on the basis of driving of the oscillation driving unit.

Abstract: An image projecting apparatus enables the formation of a projected image faithful to original image information by reducing degradation in the projected image due to decrease in imaging performance of a projection optical system. Image information is processed by an image processing device, which includes a first and a second image processor. A light modulating device modulates a flux of light emitted by an illumination optical system based on the processed image information. The modulated flux of light is projected on a screen by a projection optical system. If the image information processed by the first image processor in a pixel region is not within a representable modulation range of the light modulating device, the image information is processed by the second image processor.

Abstract: The need is met according to the present invention by providing a method of correcting pixel by pixel variations in a display, the method including the steps of creating a defect map of pixel intensity offsets for the display; correcting an input signal according to the defect map; and displaying the corrected input signal on the display, wherein the offset defect map is created by modulating a pixel in the display at a predetermined rate at a predetermined intensity; sensing the display with a photosensor to generate a sensed signal; demodulating the signal with a synchronous demodulator at the predetermined rate to produce a demodulated signal representing a sensed intensity; and employing the sensed intensity and the predetermined intensity to generate a correction offset.

Abstract: A method for adjusting convergence in a projection television receiver, in which a marker contained in a projected image is adjusted by a manipulated variable to illuminate a photosensor arranged adjacent to the projection screen. The method employs two markers which are moved towards the sensor from opposite directions with a varying step size. The sensor supplies an output voltage indicating lighting by the two markers in conjunction with two mutually spaced manipulated variables. A mean value of the two manipulated variables is used as the manipulated variable for the marker.

Abstract: A system for mounting an infrared (IR) remote control receiver in a rear projection television apparatus features a mirror having a coating wherein visible light is reflected to a viewing device, and light in the infrared regions is passed through the mirror and detected by an IR receiver mounted behind the mirror.

Abstract: In a system according to the invention, fine image data 2 created and output by a personal computer 1 is input to an image processing/dividing section 4. The image processing/dividing section 4 determines, on the basis of parameters stored in a projector arrangement storage 5, which portion of the fine image data 2 is output to which projector, thereby performing a predetermined processing. Digital signals from the image processing/dividing section 4 are input to a plurality of D/A converters 6, respectively, where the signals are converted to analog signals. Images in the form of the analog signals are projected onto a screen 8 from projectors 7a-7d. Thus, the image projected on the screen 8 is constituted of accurately positioned images, and hence is a very fine image.

Abstract: In a system according to the invention, fine image data 2 created and output by a personal computer 1 is input to an image processing/dividing section 4. The image processing/dividing section 4 determines, on the basis of parameters stored in a projector arrangement storage 5, which portion of the fine image data 2 is output to which projector, thereby performing a predetermined processing. Digital signals from the image processing/dividing section 4 are input to a plurality of D/A converters 6, respectively, where the signals are converted to analog signals. Images in the form of the analog signals are projected onto a screen 8 from projectors 7a-7d. Thus, the image projected on the screen 8 is constituted of accurately positioned images, and hence is a very fine image.

Abstract: Disclosed is a method of finding a reference object within a coded object having a plurality of regions. Each region has a plurality of subregions, and at least a majority of a first one of the subregions has a different color from a second one of the subregions. The reference object has a known relative position to other objects within the coded object so that the reference object is utilizable to locate the other objects within the coded object. A first one of the subregions within a selected one of the regions within the coded object is selected. A first region and a second region within the coded object are also selected. The selected first and second region form a plurality of subregion pairs. Each subregion pair includes a subregion from the seleced first region and a subregion from the selected second region. Luminosity values of the subregions within each subregion pair are compared.

Abstract: A plurality of photo detectors are arranged outside the display screen of a projection display apparatus having a built-in digital convergence correction system and a function for adjusting data in the frame memory so as to coincide the photoelectric devices of the photo detectors with the adjustment patterns is provided. The adjusted data when the convergence on the entire screen of the display is adjusted and the adjusted data when the convergence is adjusted by the adjustment function before misconvergence is generated are memorized beforehand. When misconvergence is generated, the convergence is adjusted by the adjustment function again, and a corresponding correction value is obtained on the photo detector by calculating the adjusted data at this time and the prememorized adjusted data, and a correction value on the entire screen is obtained by executing an interpolation calculation from this correction value, and the misconvergence on the entire screen is corrected.

Abstract: A color cathode-ray tube comprises a phosphor screen formed on an inner surface of a face plate and having a plurality of three-color phosphor layers. A plurality of first index phosphor layers are provided on the phosphor screen and extending in parallel to the three-color phosphor layers, and a plurality of second index phosphor layers are provided on the phosphor screen and inclined to the three-color phosphor layers at a predetermined angle. Electron guns are provided in an envelope and emit electron beams to the screen section so as to dividedly scan a plurality of regions of the screen section. Photoelectric conversion devices are provided on the envelope and detect first index signals and second index signals generated from the first and second index phosphor layers by scanning of the electron beams, respectively. Deflection devices for deflecting the electron beams are controlled by a controller in response to the detected first and second index signals.

Abstract: For the purpose of detecting a geometric distortion of an image on a screen of a CRT display device, i.e., the deviation of the positional coordinates at a high speed and with a high accuracy, the positions of window images having about 10 rows and 10 columns which are arranged in a matrix on the screen of the display device, including a screen frame, are photographed through a predetermined low-pass filter by a monochromatic CCD camera, and further, both the low-light field picture and the high-light field picture are photographed, whereby the positions of the window images can be detected with a high accuracy within 0.1 CCD pixel by the elimination of a dark current, the normalization of detection sensitivity and the interpolation calculation. Therefore, the detection of the geometric distortion can be performed at a high speed and with a high accuracy by an inexpensive monochromatic CCD camera which has the number of pixels less than the total number of pixels of the display device.

Abstract: A time-varying control signal is developed by a current sensor connecting the imaging screen and a closely proximate screen grid of a cathode ray tube as an imaging electron beam is operatively swept across the screen to produce images thereon. The control signal is processed and then applied to at least one of the tube operating elements--such as the horizontal and vertical deflection coils, the focusing lens, the electron beam generator and, in a plural beam tube, the convergence assembly--which controls a characteristic affecting the quality of an image. Specific arrangements for using the time-varying control signal to compensate for geometric image distortions affecting horizontal linearity and to increase the imaging resolution of the tube are disclosed.

Abstract: A display device includes a beam index type cathode ray tube having a fluorescent screen on which red, green and blue fluorescent materials are formed in strip configurations and further index fluorescent materials are formed in strip configurations with a predetermined pitch, a sensor for converting light generated from the index fluorescent materials into an electric signal when an electron beam is impinged on the index fluorescent materials upon horizontal scanning of the electron beam with respect to the fluorescent screen, and for multiplying the converted electric signal, an index signal processing circuit for switching red, green and blue signals in accordance with the multiplied electric signal from the sensor, and for controlling luminance of the cathode ray tube in accordance with a luminance level control signal, and a driving voltage generating circuit for controlling a driving voltage applied to the sensor in accordance with the luminance level control signal to thereby control a multiplication r

Abstract: A Dynamic Color Separation (DCS) color display system employs signals which provide timing, luminance, and chrominance information of the display output. The display system includes a timing circuit which produces unique signals for correcting errors produced when hue is controlled by the phase of the (S) signal and the degree of saturation with its amplitude. The signals may be applied to known CRT beam guns, and modified guns specific to the generated signals are also disclosed.