38 results about "Exposure measurement" patented technology

Systems, methods and devices for gathering data concerning exposure of predetermined survey participants to billboards are provided. A portable transmitter is arranged to transmit a signal containing survey participant data, and a receiver located proximately to the billboard serves to receive the signal transmitted by the transmitter.

Example methods and apparatus for collecting media site data for use with media exposure measurement systems are disclosed. A disclosed example method involves displaying a first image of a scene and receiving a user-provided selection of a location in the first image. An object of interest in the scene is then identified based on the user-provided selection in the first image. The example method also involves obtaining a distance value representative of an approximate distance between an image capturing device and the object of interest in the scene. A zoom level of the image capturing device is then set based on the distance value to capture at least a portion of the object of interest in the scene. A second image of the object of interest is captured using the image capturing device.

A method for sensing a level of ionizing radiation directed from a radiation source through a subject and toward a digital radiography detector, executed at least in part by a logic processor, obtains image data that relates the position of the subject to the digital radiography detector and assigns one or more radiant-energy sensing elements of the digital radiography detector as one or more exposure control sensing elements. The one or more exposure control sensing elements are sampled one or more times during exposure to measure the exposure directed to the subject. A signal is provided to terminate exposure according to exposure measurements obtained from the one or more exposure control sensing elements within the digital radiography detector.

A system is provided for determining personal ultra-violet (UV) radiation measurements, comprising: a measurement device configured to measure UV irradiation; and a terminal device configured to receive or capture an output of the measured UV irradiation from the measurement device and to determine a specific user's personal UV exposure risk level based on at least the measured sun irradiation and information of a skin type of the specific user. The measurement device configured to measure UV radiation exposure includes a surface that includes a plurality of different sections that each have a different sensitivity to UV radiation exposure, and each of the plurality of different sections are configured to display a different color in response to the UV radiation exposure.

A system for providing a simulated total dose exposure measurement during a nuclear facility training exercise by locating participants using a real time location system, modeling incremental exposure as a function of location and summing incremental exposure to produce a total dose for each of the participants. Total dose may be displayed via a wireless link to a simulated dosimiter worn by each participant. Radiation sources may also have location tags and the exposure model may be modified in real time according to the tracked location of the radiation source. In one embodiment, the locating technology comprises near field locating technology based on comparing near field signal characteristics. Alternative locating technologies may be used.

A pixel sensor having a main photodiode and a parasitic photodiode and a method for reading out that pixel sensor are disclosed. The parasitic photodiode also serves the function of a floating diffusion node in the pixel. The pixel sensor is read by first determining the exposure as measured by the parasitic photodiode and then determining the exposure as read by the main photodiode. One of the two exposure measurements is chosen as the pixel output. The main photodiode has a light conversation efficiency chosen such that one of the two measurements will provide a measurement of the exposure over a dynamic range that is greater than that of either the main photodiode or the parasitic photodiode utilized separately.

A method for sensing a level of ionizing radiation directed from a radiation source through a subject and toward a digital radiography detector, executed at least in part by a logic processor, obtains image data that relates the position of the subject to the digital radiography detector and assigns one or more radiant-energy sensing elements of the digital radiography detector as one or more exposure control sensing elements. The one or more exposure control sensing elements are sampled one or more times during exposure to measure the exposure directed to the subject. A signal is provided to terminate exposure according to exposure measurements obtained from the one or more exposure control sensing elements within the digital radiography detector.

An exposure measurement apparatus is configured by including a size measurer measuring respective sizes of at least a pair of transferred patterns having mutually different optimal focus positions out of a plurality of transferred patterns formed by being transferred onto a transfer object, a difference value calculator obtaining a difference value between the size of one transferred pattern and the size of the other transferred pattern, a focus variation amount calculator calculating a focus variation amount of the transfer object using the difference value, and an exposure variation amount calculator calculating an exposure error amount of a wafer.

The invention relates to a digital-analog hybrid integrated circuit design field and provides an asynchronous CMOS pixel circuit with a light adaptive threshold voltage adjustment mechanism. The objectives of the invention are to maintain the advantages of high dynamic range and low fixed-model noise of a circuit, and compress time for measuring light intensity in a relatively small range, and improve the response speed of the circuit. In order to achieve the above objectives, the following technical schemes are adopted: the asynchronous CMOS pixel circuit with the light adaptive threshold voltage adjustment mechanism is composed of a light intensity change detection unit (CD), an exposure measurement unit (EM) using a PWM mode and a VrefL reference voltage switching unit; and output signals Rst of the output end R of the change detection unit are connected with the input end Reset of the exposure measurement unit and the input end T1 of the VrefL reference voltage switching unit and are respectively used for controlling signals of measurement initiating of the exposure measurement unit and controlling the evaluation of light intensity. The asynchronous CMOS pixel circuit with the light adaptive threshold voltage adjustment mechanism of the invention is mainly applied to the digital-analog hybrid integrated circuit design.

This invention provides one automatic exposure measurement method to determine exposure value with host image, which comprises the following steps: host testing step to test image host position by use of focus value; exposure value computing step to compute image exposure value by use of automatic exposure computation function.

A system is provided for determining personal ultra-violet (UV) radiation measurements. The system may include a measurement device configured to measure UV irradiation; and a terminal device configured to receive an output of the measured UV irradiation from the measurement device and to display a specific user's personal UV exposure risk level based on at least the measured sun irradiation.

The present application discloses devices, systems and methods for establishing and utilizing a UV sensing network to harness the efficacy of distributed UV sensing to produce improved accuracy of UV exposure measurement using mobile devices. This may be accomplished by “crowd sourcing”, i.e. having multiple devices work collaboratively to measure the UV exposure. The collaboration can be implemented in many potential ways, such as, using a server based architecture where devices connect to a specific “UV measurements server” to provide measurements and receive aggregate estimated exposure levels, and / or by using a peer-to-peer architecture, where devices in a specific region creates a local ad-hoc UV sensing network.

An electronic circuitry of a spectrometer, configured to electrically connect with an optical sensor of the spectrometer, includes a memory unit configured to store a measurement setting, a trigger line configured to transmit at least one trigger signal, and a control unit electrically connected to the trigger line and the memory unit. The control unit is configured to receive the trigger signal from the trigger line so as to instruct the spectrometer to perform a plurality of exposure measurements continuously under the measurement setting, and to save a plurality of spectral data acquired from the exposure measurements into the memory unit. A spectrometer using the electronic circuitry for performing the exposure measurements and a measuring method of the spectrometer are also provided.

The invention belongs to the technical field of anti-universe rays and concretely relates to an anti-universe ray system for internal exposure measurement and an anti-coincidence method. The anti-universe ray system for internal exposure measurement comprises an anti-coincidence detector disposed in a shielding chamber having a high-purity germanium detector and an electronics device arranged outside the shielding chamber and connected with the anti-coincidence detector and the high-purity germanium detector, wherein the electronics device has an anti-coincidence circuit and a multi-channel analyzer; the anti-coincidence detector can detect external cosmic ray signals; and the high-purity germanium detector can be applied to internal exposure measurement. Current internal exposure measurement has high background due to the effect by cosmic rays; by the use of the anti-universe ray system for internal exposure measurement and the anti-coincidence method, internal exposure monitoring background can be reduced and detection lower limit can be improved; acceptable daily intake amount of radioactive medicine by a testee during the internal exposure measurement can be reduced with the achievement of effective measuring effect; and radiation injury of the testee can be reduced.

A Raman spectrum is measured inside animal tissue, such us human skin tissue, at a selected depth from a surface the tissue. A pH value is computed using a function that assigns a pH value as a function of the measured Raman spectrum. The computation may involve computing a number representing a ratio of concentrations of a protonated and a deprotonated version of a chemical substance from the Raman spectrum and generating pH information on the basis of said number. The chemical substance is for example a form of Urocanic acid (UCA). UV exposure is measured from the weight of the spectrum of cis-UCA.

A digital X-ray system for capturing high quality images by maximizing the collection of emitted light from an intensifying screen in response to X-ray impact. The digital X-ray system includes a housing having a fluorescent intensifying screen for receiving emitted X-rays, two reflectors for maximizing light collection and optimizing the light path from the intensifying screen, and a lens assembly. A CCD chip receives the light from the lens assembly, to provide a digital image for immediate on-board processing or post-processing by a computer. The housing is compact, and can be used as a direct replacement for traditional film cartridges without major modifications to the system. The lens assembly includes freeform matched lenses to remove optical distortions, and the housing includes a light sensor for providing exposure measurement and feedback. The system is designed to be quasi-monochromatic to maintain consistent image quality over the entire area of the intensifying screen.

A method and a device for optimizing HDR rendering by using multi-frame data and a storage medium are disclosed. The method comprises the following steps: rendering in an HDR rendering target; converting the HDR into LDR of the current rendered frame by using the exposure measurement results; carrying out desampling on the LDR texture of the current rendering fram to obtain the exposure measurement results used in the next rendering frame. The method and device for optimizing HDR rendering by using multi-frame data and the storage medium of the present invention immediately apply the exposuremeasurement result of the previous rendering frame to the current rendering frame in the whole HDR rendering flow, so that only limited times of rendering target switching are used, and the bandwidthand display memory occupied by the HDR texture are not needed to be created.

The invention discloses an exposure sensor based on memristors connected in reverse series. The exposure sensor comprises a first power supply V1, a second power supply V2, a switch K, a photoelectric module, a current-limiting module, an memristor module, a difference-acquiring module, an amplifying module, and an increasing module. The first power supply V1 or the second power supply V2 forms a circuit successively with the switch K, the photoelectric module, the current-limiting module and the memristor module. The memristor module includes memristors Mz1, Mz2, Mj1 and Mj2. The Mj1 and the Mj2 are completely the same. The Mz1 and the Mj1 are connected in series. The Mz2 and the Mj2 are connected in series. A series branch formed by the Mz1 and the Mj1 is connected in parallel with a series branch formed by the Mz2 and the Mj2. The difference-acquiring module is connected with the memristor module. The amplifying module is connected to the difference-acquiring module. The increasing module is connected with the amplifying module. The exposure sensor is large in exposure measurement range, high in sensitivity, suitable for the measurement of large exposure and long exposure, and is simple in circuit, avoids an influence of a memristor resistance value change on the loop current and the exposure measurement of the sensor, and is low in measurement error and easy to use.

A method for measuring the radiant exposure of energy curable inks or coatings on a printing press. The steps for measuring comprise: a) providing an ink or coating material comprising a fluorescent probe; b) transferring the ink or coating material onto a substrate using a printing process; c) exposing the ink or coating material to actinic radiation capable of initiating cure of the ink or coating material that also alters the luminescence of the probe; d) exposing the ink or coating to a first source of excitation light with wavelength and luminance capable of absorption by the fluorescent probe; and e) measuring the emitted light from the fluorescent probe by a first detector.

A digital X-ray system for capturing high quality images by maximizing the collection of emitted light from an intensifying screen in response to X-ray impact. The digital X-ray system includes a housing having a fluorescent intensifying screen for receiving emitted X-rays, two reflectors for maximizing light collection and optimizing the light path from the intensifying screen, and a lens assembly. A CCD chip receives the light from the lens assembly, to provide a digital image for immediate on-board processing or post- processing by a computer. The housing is compact, and can be used as a direct replacement for traditional film cartridges without major modifications to the system. The lens assembly includes freeform matched lenses to remove optical distortions, and the housing includes a light sensor for providing exposure measurement and feedback. The system is designed to be quasi-monochromatic to maintain consistent image quality over the entire area of the intensifying screen.

The invention relates to the field of automotive lamp detection, in particular to an automotive lamp shape detection method, comprising the following steps of: obtaining the position and the angle ofthe gap value measurement are according to the three-dimensional model of the body contour block; and separately measuring the body contour block and the lamp to be tested according to the above position and angle. When separately measuring the body contour block and the lamp to be tested, the photoelectric sensor for measuring the two-dimensional contour data of the above two can respectively adopt two exposure measurement parameters to adapt to the transparent lamp to be tested and the non-transparent body contour block. Furthermore, the problem that the conventional photoelectric sensor measurement method is difficult to accurately measure the exposure of the lamp and the body contour block at the same time is solved.

This invention provides one automatic exposure measurement method to determine exposure value with host image, which comprises the following steps: host testing step to test image host position by use of focus value; exposure value computing step to compute image exposure value by use of automatic exposure computation function.

Described are a method, a computer program product and apparatus for detecting visual display of content. Visual content data encoded with an identifier code is received at a computer device. Visual display data is transmitted, using a local communication bus of the computer device, to a visual display device coupled to the computer device. A processor on the computer device is used to determine whether the visual display data includes the encoded identifier code. Exposure information is generated using the processor. The exposure information is associated with whether the encoded identifier code is included in the visual display data. The exposure information is transmitted, from the computer device, to a remote server device.

The invention discloses an equipment layout regulating method on the basis of exposure measurement on microwave frequency band radiation. According to the method, by measuring microwave frequency band radiation intensity of airborne equipment in different regions of a helicopter cabin body, combining a military standard limit and adopting a weighting matrix strategy, calculation on the electromagnetic compatibility balance degree of the complete machine microwave frequency band radiation of a helicopter system is completed and the problems that conventionally, an electromagnetic compatibility balanced state of the equipment radiation in the microwave frequency band of the system is difficult to well track and monitor and improvement potential of the electromagnetic compatibility of the system cannot be judged are solved. By considering the radiation characteristics of the complete machine microwave frequency band of the helicopter system, the electromagnetic compatibility balanced state of the complete machine microwave frequency band of the helicopter system is evaluated, so that pertinence and effectiveness of quantitative evaluation on the electromagnetic compatibility of the microwave frequency range are improved.

The invention discloses a visual measurement device for underground water level under negative pressure conditions, which includes a permeable pipe, a floating block, a pulley, a high-definition camera with a light source, a wire, a fixed wire interface, an indicator needle, a top cover, a bottom cover, and external display equipment. , Geotechnical filter cloth. The invention also discloses the measurement method of the device. The floating block drives the high-definition camera with the light source to change freely up and down with the floating of the groundwater level. When measuring each time, the external display equipment located outside the permeable pipe passes through the wire and the high-definition camera. The camera is connected to shoot the scale position pointed by the indicator needle in the pipe, so as to obtain the groundwater level under the negative pressure condition. The invention can accurately measure the real groundwater level under the negative pressure condition, avoids the error of traditional open measurement, and has simple structure, easy manufacture, low cost, convenient use and wide application prospect.

A mobile device (100) comprising a processor (338), a camera module (360), and a flash (366) configured to generate at least one of a reduced pre-flash, a standard pre-flash and a flash. The processor (338), in response to receiving an image capture request (202), is configured to receive a brightness value (204) and determine a flash status (206) based on a flash setting with the flash status being one of an off mode, on mode, and auto mode. In the event the flash status is one of the on mode and auto mode, determine whether there is sufficient light to capture an image based at least in part on a comparison of the brightness value and a flash threshold (208). In the event the brightness value is greater than the flash threshold, cause the flash to generate a shortened pre-flash (214) and obtain only a white balance measurement and an auto-exposure measurement during the shortened pre-flash.