Abstract: A photodetector capable of making a more accurate measurement, a photodetecting method, a program, and a storage medium, are to be provided.

Abstract: A system and method for calibrating the color balance of a video camera according to a non-standard photographic color temperature. The systems and methods incorporate a plurality of pigments, namely subtractive primary colors (yellow, cyan, magenta), that each may be utilized as a reference to adjust the color balance of a video camera. Each respective pigment is designed to replace the color white or gray as a reference to adjust the color balance so that the camera can capture the natural color of a light source according to a non-standard photographic color temperature (i.e., white).

Abstract: A color-bar signal generation unit compatible with a plurality of television signal formats is provided. The color-bar signal generation unit in accordance with the present invention includes first, second, and third color-bar signal generators for generating a color-bar signal that represents a 16:9 aspect ratio color-bar test pattern, and a color-bar signal switch for switching outputs of the generators. The color-bar signal is structured to contain a 75% color-bar signal and 100% color-bar signals. The 75% color-bar signal represents a portion of the color-bar test pattern defined with an aspect ratio of 4:3 and serves as an NTSC color-bar signal. The 100% color-bar signals represent portions of the color-bar test pattern outside the portion with the aspect ratio of 4:3 and serve as components of an HD color-bar signal. Consequently, the color-bar signal can be used in common for the HD format stipulating the aspect ratio of 16:9 and the NTSC format stipulating the aspect ratio of 4:3.

Abstract: A method for measuring a convergence of color CRT uses a combination pattern among Red(R), Green(G) and Blue(B) colors on a white pattern when measuring convergence by using a color camera so that convergence is measured with a high degree of precision. The method sequentially generates two test patterns after mixing two colors chosen from among red(R), green(G), and blue(B) colors, e.g., mixtures of red(R)/blue(B) and green(G)/blue(B). Images are independently obtained of the two test patterns formed on the color CRT screen, and a signal conversion is performed based on each independently obtained pattern image to produce image information. The image information is stored and a convergence of the stored image information for each test pattern is calculated.

Abstract: A spectroscope (2) spectrally separates a light from a light source (3) and outputs the separated light from an emitting terminal (6) thereof. An image pick-up device (1) having a solid-state image sensor picks-up an image of the emitting terminal (6). First operation means (7) performs a correction to each of plural image signals corresponding to plural pixels that are outputted by the image pick-up device (1) so that a gradation characteristic of the image pick-up device (1) is corrected from non-linearity to one closer to linearity. Second operation means (8) calculates, as a spectral responsivity characteristic for the separated light, a mean value of the plural image signals after the correction by averaging the same over a certain range within the plural pixels. As a result, the spectral responsivity characteristic of the image pick-up device (1) is measured precisely.

Abstract: This invention relates to an apparatus and method for real-time testing of television picture colors. It can conduct real-time testing and adjusting of colors at various pixels to make tree and grass greener. The apparatus in accordance with the present invention includes a chromatic-coordinate testing circuit and a chromatic-coordinate bias circuit for each set color and configuring them between the television signal output and the video-driving amplifier. The pixel identified by the chromatic-coordinate testing circuit is the pixel to be adjusted. The chromatic-coordinate bias circuit controls and changes the bias current or bias voltage output to the video-driving amplifier in color television sets so that the connected three-color electron gun produces color bias effects on the monitor screen.

Abstract: The present invention provides a color testing system for testing intensities of color output from a screen of a display device. The color testing system comprises a reading probe for reading color output from the screen of the display device, a display equipment, and a color analyzer connected to the reading probe for analyzing the intensities of the color output from the screen of the display device. When testing the display device, the color analyzer will display a screen graph and a cursor on the display equipment corresponding to a next testing area on the screen according to a predetermined test track. The screen graph and the cursor will direct an operator to move the reading probe on the screen of the display device so that the reading probe can properly read the color output of each testing area along the test track on the screen of the display device.

Abstract: Systems and methods for correlating color correction instruction between two color correcting devices are disclosed. The method includes performing a nulling test on a representation a first device has of a known standard and retaining the results of the test. A second color correcting device performs a nulling test on the same known standard and the results of this test are retained. From the results of these two tests a color correction instruction of one of the devices may be converted to a color correction instruction on the other device so that substantially the same color correction effect is achieved.

Abstract: A reference signal having either twice or four times the frequency of a color burst signal (2fsc or 4fsc) is divided into a plurality of divided signals, each having the same frequency as that of the color burst signal, or an fsc frequency. In addition, a reference signal is delayed by a predetermined amount to thereby generate a delay signal. One of the divided signals is output in synchronism with this delay signal as a first divided signal having a predetermined delay. When this first divided signal is used as a color burst signal, the remaining divided signals resultantly all have phases shifted by a predetermined amount with respect to the color burst signal. With this arrangement, some of the divided signals can be used intact as a color signal, while the others may also be used after being delayed by a predetermined amount.

Abstract: A method and system for testing the continuity of a transmission line in a non-addressable network. A method and system in a communications service environment are provided, the environment including an addressable network and a non-addressable network, for testing transmission line continuity in the non-addressable network. In an embodiment, a signal generator connected to a first transmission line in the addressable network generates a signal on the first transmission line. The first transmission line is connected to a second transmission line in the non-addressable network by a bridge. The bridge transfers the signal from the first transmission line to the second transmission line. The system also includes a signal receiver connected to the second transmission line for receiving the signal over the second transmission line when the second transmission line is continuous.

Abstract: A method and system for formatting characteristic CRT information into a standardized format to provide a dynamic CRT characteristic profile to enhance presently used methods of recalibrating CRTs is disclosed. Present CRT parameters are measured and combined with previously acquired calibration parameters in order to create updated characteristic information for the profile. The characteristic information includes the CRT color gamut, the white and black point of the CRT and the gamma of the CRT. In addition, ambient lighting conditions may be included in the profile. This characteristic information is stored in a CRT characterization profile in a standardized format. The profile is updated whenever the CRT is recalibrated or whenever the operating conditions of the CRT are changed. Further, the profile may be employed to recalibrate a destination CRT based on a source CRT's profile.

Abstract: A system for automatic generation of vector reference graticules for a vectorscope display acquires the active video portion of a video signal that includes a color bar test signal. The values for each color difference component at each reference color plateau for the acquired color bar test signal are averaged to provide horizontal and vertical displacement values for each reference color, including black. Graticule boxes are electronically generated and positioned for each reference color on a display according to the respective horizontal and vertical displacement values.

Abstract: A CRT measurement device includes an image pickup device for producing an electrical image signal with respect to a light image displayed on the CRT, an optical system having a movable focusing lens for providing a light image of varied sharpness to the image pickup means in accordance with position of the focusing lens, a sharpness detector for detecting the sharpness of a picked up image based on an electrical image signal each time the focusing lens is moved, a focal position detector for detecting a focal position of the focusing lens providing a most sharpness light image, a driver for driving the focusing lens so as to move to the detected focal position, and calculator means for calculating a characteristic of the color CRT based on the image signal produced when the focusing lens is at the focal position. This device assures automatic and accurate focusing.

Abstract: A color TV convergence measurement device and process for measuring a position of an electron beam of a multiple-beam color picture tube relative to a field of view of an image converter, in which an electron beam generation system provides the electron beam which generates a brightness distribution pattern on a screen of a tube, the screen has phosphor stripes for different colors, and a shadow mask is arranged in front of the screen and has elongated slots in the direction of the phosphor stripes.

Abstract: A color display screen displays a calibration color patch and a comparison color patch. The calibration color patch manifests a calibration color of a predetermined intensity, and the comparison color patch manifests a comparison color derived from a user determined input value. The system is controlled by a processor and is responsive to a user's indication of a perceived color match between a calibration color patch and a comparison color patch, to determine a transfer function that enables conversion of a value that generated the comparison color to a value assigned to the calibration color. The processor is further responsive to further perceived color matches of first and second color patches with first and second different intensity calibration color patches, respectively, to determine if first and second transfer functions determined for the first and second comparisons are within a transfer function threshold value of each other.

Abstract: Disclosed is a method and apparatus for highly stably and accurately generating a PAL video signal by digital processing. The method and apparatus comprise generating a basic clock having a frequency which is 11.times.N times (N: an integer) as high as a horizontal synchronization frequency F.sub.H, producing digital data of orthogonal color subcarriers, color difference signals and a luminance signal respectively with the timing of the basic clock, multiplying the digital data D.sub.B-Y D.sub.R-Y of the color difference signals by the digital data Dsin and Dcos of the color subcarriers respectively to obtain digital data of two kinds of modulation signals, adding the digital data D.sub.Y+S of the luminance signal to the digital data of the two modulation signals, and effecting digital/analog conversion of the addition to provide the PAL video signal.

Abstract: A computer color monitor portable testing apparatus includes a programmable microprocessor storing a software program and producing timing and control signals in response to operation of the program to generate selected color patterns on a selected one of different types (CGA, EGA and VGA) of color monitors to be tested, a pair of connectors one of which can be selected for connecting with a selected one of the different types of color monitors to be tested, and a mode selector switch connecting the microprocessor with the connectors and being actuatable for selecting the different operational modes for testing the different types of monitors.