102 results about "Light meter" patented technology

System and methods for querying digital image archives containing digital photographs and / or videos (collectively, "digital images"). The digital images are indexed in accordance with a plurality of recorded parameters including time, date and geographic location data (altitude and longitude), as well as image data such as lens focal length, auto focus distance, shutter speed, exposure duration, aperture setting, frame number, image quality, flash status and light meter readings, which are used for searching a database consisting of the digital images. These images are preferably generated by an image capturing system which is capable of measuring and recording a plurality of parameters with each captured digital image. The image retrieval system allows a querying user to search the image archive by formulating one or more of a plurality of query types which are based on the recorded parameters, and then retrieve and display those images having the specified parameters.

Apparatuses, methods and systems related to an improved golf data collecting and golf club notification system. The system reminds golfers when a club has been mistakenly left behind on the golf course and notifies the golfer when a golf club or clubs are in or out of the golf bag. The system can notify a golfer if a club or golf bag has been removed without authorization. In one preferred embodiment an apparatus that attaches to a golf club includes dual light sensors—one light sensor configured as a switch and one light sensor configured as a light meter. Algorithms make use of the light sensor data to determine whether a golf club is in or out of a golf bag.

Methods, apparatuses, machine readable non-transitory storage media, and systems which process measured light values in order to determine the status of a golf club relative to a golf club bag are described. In one embodiment, a system uses a floating threshold, which is between a running bright average and a running dark average, to determine whether to add a current light meter value to one or the other of these running averages. In another embodiment, a system resets or re-seeds the running averages so that re-seeded averages are used after exiting from a sleep state such as a dark sleep state. In another embodiment, a system uses light sensor information or other sensor information to determine when a club is in use. Other embodiments are also described.

A lightmeter-remote is usable in a system with a remotely settable camera and a plurality of remotely settable photolamps. The lightmeter-remote has a body, and a lightmeter, exposure controller, and transmitter disposed in the body. The exposure controller can be selectively actuated to set aperture, exposure time, and gain parameters of the camera and to set output parameters of each of the photolamps. The transmitter operatively and wirelessly connects the camera and photolamps with the exposure controller. The lightmeter-remote can have a plurality of lighting models, each providing user instructions defining a lighting setup and requiring one or more light measurements.

The present invention involves a light system for stimulating or regulating neuroendocrine, circadian, and photoneural systems in mammals based upon the discovery of peak sensitivity ranging from 425-505 nm; a light meter system for quantifying light which stimulates or regulates mammalian circadian, photoneural, and neuroendocrine systems. The present invention also relates to translucent and transparent materials, and lamps or other light sources with or without filters capable of stimulating or regulating neuroendocrine, circadian, and photoneural systems in mammals. Additionally, the present invention involves treatment of mammals with a wide variety of disorders or deficits, including light responsive disorders, eating disorders, menstrual cycle disorders, non-specific alerting and performance deficits, hormone-sensitive cancers, and cardiovascular disorders.

The present invention is directed to an image sensor with an integrated light meter that can be used to automatically adjust the display brightness based on ambient light in the environment. According to one embodiment, an automatic exposure (AE) control loop estimates the ambient light when the image sensor is imaging, and the image sensor measures the ambient light when the image sensor is not imaging.

There is provided a self-propelled electronic device for use on a base surface. The electronic device includes a chassis disposable over the base surface. The chassis includes a first surface facing the base surface when the chassis is disposed thereover. A light meter is configured to detect light incident toward the first surface and determine a luminance level thereof the detected light. A light source is configured to transition between an ON and OFF states dependent on the luminance level of the detected light. A line sensor is coupled to the chassis and is configured to sense a line segment on the base surface. A movement mechanism is coupled to the chassis and is placeable on the base surface. The movement mechanism is in operative communication with the line sensor to move on the base surface in a pattern corresponding to the line sensed on the base surface.

A method and apparatus for automating a quality assurance test conducted on display devices used for diagnostic imaging. In one embodiment, the apparatus includes an automated mechanical system for scanning a light meter over a test pattern displayed on a display device. In another embodiment, the method comprises an automated method of comparing the measured data from the light meter with an ideal image. In another embodiment, the method comprises obtaining a digital image of the test pattern displayed on the display device, and the digital image is compared with an ideal image.

The invention provides a method for correcting colors of a projector, comprising the following steps: using a light meter to adjust parameters such as aperture, exposure time and the like of a camera;comparing the projected image obtained by the camera with an original image, using a nonlinear optimization method to fit a luminosity response curve; using the luminosity response curve to correct the original image to obtain a high-quality projected image suitable for human eyes. The method has advantages that a method of computer software is used, the problem of the color difference in a single-projection display system or a multi-projection display system is solved, the quality of pictures and the visual effect are improved, expensive and complicated special optical apparatuses are not needed, at the same time, the number of the photos needed in a HDR method is greatly reduced (the HDR method needs to shoot ten images, the method of the invention needs one image); and the method has simple operation, easy practicality and strong extensibility.

A gemstone fluorescence measuring device according to the invention generally includes an ultraviolet (“UV”) emission chamber, a UV radiation source, and a light meter assembly. The UV radiation source includes an upper light emitting diode (“LED”) and a lower LED that radiate a gemstone under test from both above and below the gemstone. The UV radiation source provides both trans-radiation and direct radiation to the gemstone, and the UV radiation source has an adjustable intensity, thus facilitating calibration of the fluorescence measuring device. The light meter assembly includes a light detector that detects the visible light emitted from the gemstone under test in response to the UV radiation. The light detector is configured to simulate the spectral characteristics of the human eye. The fluorescence measuring device converts the measured visible light into a numerical lux reading, which can then be converted into a fluorescence grade for the gemstone under test.

Methods, apparatuses, machine readable non-transitory storage media, and systems which process measured light values in order to determine the status of a golf club relative to a golf club bag are described. In one embodiment, a system uses a floating threshold, which is between a running bright average and a running dark average, to determine whether to add a current light meter value to one or the other of these running averages. In another embodiment, a system resets or re-seeds the running averages so that re-seeded averages are used after exiting from a sleep state such as a dark sleep state. In another embodiment, a system uses light sensor information or other sensor information to determine when a club is in use. In another embodiment, an active golf ball tag includes a sensor (e.g. one or more impact sensors) to detect when a golf ball is hit and to cause an RF transmitter to transmit an RF signal to an RFID reader.

An exemplary image sensor comprises a photodetector proximate to a pixel site, and a light meter proximate to the pixel site configured to approximate an initial charge acquired by the photodetector at the end of a first integration period of a frame exposure period. A reset circuit resets the photodetector if the approximated initial charge acquired by the photodetector exceeds a threshold. A readout circuit detects a final charge acquired by the photodetector at the end of a second integration period of the frame exposure period. If the photodetector was reset, the readout circuit adjusts the final exposure to account for exposure prior to the photodetector having been reset.

There are provided an imaging apparatus and an electronic device having the same, and a method for determining a backlit condition, an exposure compensation method and an imaging method in the imaging apparatus. The imaging apparatus includes a body; an imaging unit installed in the body and configured to photograph an image in a first direction; an image processing unit configured to generate image data by processing the image; a light meter installed in the body and configured to measure light in a second direction corresponding to an incident direction of light different from an incident direction of light of the first direction; and a control unit configured to control first imaging unit to photograph the image at an exposure value calculated using a photometric value obtained by the light meter.

The invention discloses a high dynamic range imaging method of a camera array, and aims at solving the technical problem of low dynamic range of the existing camera array imaging method. According to the technical scheme, the method is that the maximum brightness and the minimum brightness of a target scene are obtained through a light meter or a built-in light detector in the camera so as to gain a group of optimized exposure bracketing grades; the camera combination participating in exposure in the array is determined, and the camera scene is synchronously shot through the camera combination so as to obtain a group of low dynamic range image containing different exposure settings of the target scene; the group of low dynamic range images is geometrically corrected according to the geometric relationship between the camera layout and the target scene to obtain a group of corrected low dynamic range images which cover the target scene dynamic range. According to the method, the total exposure time, of using the multi-exposure technology to obtain the high dynamic range image, which is equal to the sum of the times of a plurality of exposure, is reduced to the longest exposure time of the exposure bracketing combination; the problems of large time consumption due to exposing the static scene high dynamic range at a plurality of times and ghosting of imaging of the dynamic scene high dynamic range can be solved.

An imaging apparatus has a first mode in which a determination unit determines an exposure timing of an imaging unit based on a timing calculated by a calculation unit after a light metering unit performs light metering a first number of times, and a second mode in which the determination unit determines the exposure timing of the imaging unit based on the timing calculated by the calculation unit after the light metering unit performs the light metering a second number of times.

A system and method of light bulb and fixture comprising an occupancy sensor, a light meter, and an on / off circuit switch is used to manage the lighting use base on the sensing the presence of people and area lighting condition. The occupancy sensor, light meter, an on-off circuit switch, and a regulator are incorporated into the light bulb or fixture for easy replacement and no need of re-wiring or major fixture change.

One embodiment of the invention sets forth a mechanism for displaying lighting values associated with a 3-D graphics model by superimposing an overlay grid with lighting values on the 3-D graphics model. A software rendering engine computes lighting values for each frame that includes the 3-D graphics model, where each frame may have different lighting settings. An overlay grid with lighting values may be superimposed on an area defined by a light meter on the 3-D graphics model. The lighting values on the overlay grid are associated with the light meter and may vary frame-over-frame. In another embodiment, a JPEG image with a superimposed overlay grid with per-pixel lighting values covering a 3-D graphics model is generated for each frame that includes the 3-D graphics model. These JPEG images may be displayed on the screen and stored to an external memory.

Diffuse image measurement system and digital image formation method. The system includes a source of light with time-varying intensity directed at a scene to be imaged. A time-resolved light meter is provided for receiving light reflected from the scene to generate time-resolved samples of the intensity of light incident at the light meter. The temporal variation in the intensity of light incident at the light meter is associated with a function of a radiometric property of the scene, such as a linear functional of reflectance, and a computer processes the samples to construct a digital image. The spatial resolution of the digital image is finer than the spatial support of the illumination on the scene and finer than the spatial support of the sensitivity of the light meter. Using appropriate light sources instead of impulsive illumination significantly improves signal-to-noise ratio and reconstruction quality.

A method for measuring a quality parameter, such as luminance uniformity, of a video display, according to some embodiments of the present invention, includes providing a plurality of pattern images to be displayed sequentially on the video display, measuring the amount of light produced by each pattern image using a wide-angle light sensor, and calculating the video display quality parameter using the measured light values corresponding to each displayed pattern. Each pattern used in accordance with this method is derived from an orthogonal matrix, resulting in each pattern having a high average brightness, thereby eliminating the need to use a narrow-angle, spot light meter, and instead allowing measurements to be made using a simple, wide-angle, incident-light or reflected-light photometer. This method is compliant with the relevant SMPTE measurement standard for measuring luminance uniformity. Additionally, some embodiments of the present invention provide an apparatus for practicing this method.

A light meter for measuring photometric quantities includes a telephotometer having a photo detector to receive light energy entering the telephotometer. A light metering valve, for the purpose of providing a variable field of view, is located in the body of the telephotometer generally at the focal plane of the objective lens of the telephotometer. A controller, which includes a digital processor in communication with the photo detector will process information from the photo detector and from a range finder included in the system to output light intensity of a target light source.

A gemstone fluorescence measuring device according to the invention generally includes an ultraviolet (“UV”) emission chamber, a UV radiation source, and a light meter assembly. The UV radiation source includes an upper light emitting diode (“LED”) and a lower LED that radiate a gemstone under test from both above and below the gemstone. The UV radiation source provides both trans-radiation and direct radiation to the gemstone, and the UV radiation source has an adjustable intensity, thus facilitating calibration of the fluorescence measuring device. The light meter assembly includes a light detector that detects the visible light emitted from the gemstone under test in response to the UV radiation. The light detector is configured to simulate the spectral characteristics of the human eye. The fluorescence measuring device converts the measured visible light into a numerical lux reading, which can then be converted into a fluorescence grade for the gemstone under test.

A printing system for indicating print media quality to printer users includes a printing assembly configured to route print media along a pathway for printing. In an example, the system includes, but is not limited to, a thermal printer having a thermal print head for printing onto paper. The system also includes a light meter configured to detect light reflected from the print media, such as the paper. The light meter also measures a characteristic of the detected light. An indicator is coupled to the light meter, and configured to present a quality level of the print media to a user based on the measured characteristic of the detected light.

The invention provides the tools needed for a dental patient's caries risk assessment. Included is a complete turnkey system for caries risk assessment and treatment, including an ATP test and a plurality of rinses and educational and diagnostic materials. The system for the detection and treatment of the bacterial infection that causes dental caries in a patient comprises a disposable ATP Bioluminescence sampler to swab areas of the patient's mouth, a bioluminescent light meter which measures the amount of ATP present in the patient's mouth, a rapid culture test for the detection of Mutans streptococci and lactobacilli, a diagnostic testing component that includes a caries risk assessment questionnaire, a treatment component that includes a short term therapeutic oral rinse of at least two components, and a long term maintenance rinse.

The invention discloses a filtering circuit for a lighting metering distribution box. The circuit comprises a pre-filtering circuit which is connected to an amplifying circuit which is connected to a back-filtering circuit, and the back-filtering circuit is connected to the pre-filtering circuit through a feedback circuit. According to the invention, the deficiency of the prior art can be improved, and the filtering effect of a noise signal with a dynamic change is improved.

One embodiment of the invention sets forth a mechanism for displaying lighting values associated with a 3-D graphics model by superimposing an overlay grid with lighting values on the 3-D graphics model. A software rendering engine computes lighting values for each frame that includes the 3-D graphics model, where each frame may have different lighting settings. An overlay grid with lighting values may be superimposed on an area defined by a light meter on the 3-D graphics model. The lighting values on the overlay grid are associated with the light meter and may vary frame-over-frame. In another embodiment, a JPEG image with a superimposed overlay grid with per-pixel lighting values covering a 3-D graphics model is generated for each frame that includes the 3-D graphics model. These JPEG images may be displayed on the screen and stored to an external memory.

The invention belongs to the field of light control devices, particularly relates to a light metering compensation device and method, and aims to solve the technical problems that the development work is tedious due to the fact that a coefficient is required to be adjusted and compensated in a preset compensation module when a light intensity measurer is mounted on different types of panels in the prior art and deviation occurs to a measured value of external light intensity due to chromatic aberration in different batches of panels. A light source generator generates exciting light, first attenuation light is formed after the exciting light passes through a light barrier board, the light intensity measurer measures light intensity of the first attenuation light, a controller computes the light intensity of the exciting light and the light intensity of the first attenuation light to obtain a compensation coefficient, external light passes through a light transmitting panel to form second attenuation light, the light intensity measurer measures light intensity of the second attenuation light, the controller computes the light intensity of the second attenuation light and the compensation coefficient to obtain light intensity of the external light, and the light intensity of the external light serves as an anticipation condition of an equipment control strategy. According to the scheme, the light intensity of the external light can be accurately obtained, and equipment can implement control strategies according to different environments.

The present invention proposes a data encryption method and system suitable for communication of light-duty synchrophasor measuring instruments, including: providing distribution network synchrophasor data as messages; providing randomly generated DES keys; providing random encryption based on the RSA encryption algorithm. Generated RSA public key and RSA private key; use the RSA public key to encrypt the DES key to generate an encrypted DES key; use the RSA private key and the RSA encryption algorithm to decrypt the encrypted DES key to generate The decrypted DES key; using the decrypted DES key to encrypt the message, and output the encrypted distribution network synchrophasor data. The invention has beneficial effects: it can not only realize the encryption and decryption of the data of the light-duty synchrophasor measuring instrument, but also ensure that the speed of encryption and decryption meets the time delay requirements of the light-duty synchrophasor measuring instrument, and can also realize the dynamic management of the key, and finally ensure that Communication security of lightweight synchrophasor measuring instrument data.