147 results about "Exposure duration" 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.

A safety indicator monitors environment conditions detrimental to humans e.g., hazardous gases, air pollutants, low oxygen, radiation levels of EMF or RF and microwave, temperature, humidity and air pressure retaining a three month history to upload to a PC via infra red data interface or phone link. Contaminants are analyzed and compared to stored profiles to determine its classification and notify user of an adversity by stored voice messages from, via alarm tones and associated flashing LED, via vibrator for silent operation or via LCD. Environmental radiation sources are monitored and auto-scaled. Instantaneous radiation exposure level and exposure duration data are stored for later readout as a detector and dosimeter. Scans for EMF allow detection with auto scaling of radiation levels and exposure durations are stored for subsequent readout. Electronic bugs can be found with a high sensitivity EMF range setting. Ambient temperature measurements or humidity and barometric pressure can be made over time to predict weather changes. A PCS RF link provides wireless remote communications in a first responder military use by upload of alarm conditions, field measurements and with download of command instructions. The link supports reception of telemetry data for real time remote monitoring of personnel via the wrist band for blood pressure, temperature, pulse rate and blood oxygen levels are transmitted. Commercial uses include remote environmental data collection and employee assignment tasking. GPS locates personnel and reporting coordinates associated with alarm occurrences and associated environmental measurements.

A method of combining image data from multiple frames to enhance one or more parameters of video image quality includes acquiring a first image at a first exposure duration, as well as acquiring a second image at a second exposure duration shorter than the first exposure duration and at a time just before, just after or overlapping in time with acquiring the first image, such that the first and second images include approximately a same first scene. In this way, the second image is relatively sharp and under-exposed, while the first image is relatively well-exposed and less sharp than the second image. Brightness and/or color information are extracted from the first image and applied to the second image to generate an enhanced version of the second image.

A color filter enhancement method for a portable digital image acquisition device includes digitally exposing color pixels of a color sensor array for a first digital exposure duration and digitally exposing white pixels of a color sensor array for a second digital exposure time shorter than the first digital exposure duration. A color filter enhanced digital image is generated using data from both the color pixels exposed for the first digital exposure duration and the white pixels exposed for the second digital exposure duration.

A still image capturing device includes an image sensor comprising a plurality of pixel elements. An electronically actuatable shutter device includes a plurality of individually addressable and actuatable shutter elements. A shutter element substantially corresponds to one or more pixel elements. A memory stores an exposure threshold and one or more exposure patterns. A processor controls the plurality of shutter elements according to the exposure threshold or according to an exposure pattern.

An apparatus comprising an image sensor and a control logic circuit. The image sensor includes at least a first pixel array and a second pixel array, wherein at least some of the pixels of the first pixel array are interspersed over an image sensing area with pixels of the second pixel array. The control logic circuit is operable to control durations of exposure of the first pixel array and the second pixel array independently.

A computer-implemented method serves advertisements. The method includes identifying a first advertising opportunity for a user. The advertising opportunity includes an opportunity to display an advertisement to the user. A threshold exposure value is determined. The advertisement is served to the user during the first advertising opportunity. An exposure duration is tracked through the use of at least one processor. The exposure duration represents a total length of time that the advertisement is displayed to the user. The exposure duration is compared to the threshold exposure value. A second advertising opportunity for the user is identified. The method also includes serving the advertisement to the user during the second advertising opportunity when the exposure duration is less than the threshold exposure value, and not serving the advertisement to the user during the second advertising opportunity when the exposure duration is not less than the threshold exposure value.

A testing apparatus (100) for an image capture device (401) includes a liquid crystal device (101). The liquid crystal device (101) includes an array of pixels (102), which may actively or passively be changed from a transparent state to an opaque or semi-opaque state. The array of pixels are capable of segmentation into a plurality of predefined regions (107), which may be columns (108) or rows (208). A liquid crystal device driver (105) is configured to actuate the predefined regions (107), individually and sequentially, in a sweep pattern across the liquid crystal device. The testing apparatus (100) may be used to measure a variety of parameters associated with image capture devices, including exposure duration, continuous shutter frequency, and flash-shutter lag. The testing apparatus (100) is capable of operation in a variety of ambient lighting conditions.

A method of manufacturing a distributed Bragg reflector (DBR) in group III-V semiconductor compounds with improved optical and electrical characteristics is provided. A selected DBR structure is achieved by sequential exposure of a substrate to predetermined combinations of the elemental sources to produce a pair of DBR layers of compound alloys and a graded region including one or more discrete additional layers between the DBR layers of intermediate alloy composition. Exposure durations and combinations of the elemental sources in each exposure are predetermined by DBR design characteristics.

The invention provides an exposure control method and device, electronic equipment and a computer-readable storage medium. The method comprises the following steps: determining target exposure of theto-be-acquired image of each frame through photometry; according to the target exposure of the to-be-acquired image of each frame and the preset light sensitivity of the to-be-acquired image of each frame, determining the exposure duration of the to-be-acquired image of each frame; if the exposure duration of the to-be-acquired image of one or more frame is less than the lower limit of duration, updating the exposure duration of the to-be-acquired image of one or more frame according to the lower limit of duration; finally, performing exposure control according to the exposure duration and light sensitivity of the to-be-acquired image of each frame. Therefore, the dynamic range and overall brightness of night scene shot images are improved, and noise in the images is inhibited; moreover, ghost and fuzziness caused by hand shake are inhibited, the quality of the night scene shot images is improved, and the user experience is improved.

A method and/or device of adaptively controlling an exposure duration for a camera. A determination is made as to whether motion is present. If it is determined that motion is present, exposure duration for one or more images is automatically decreased. If it is determined that motion is not present, the frame exposure duration is automatically increased.

A method of assessing cognitive impairment of a user includes presenting a visual test stimulus to the user for a pre-determined test stimulus exposure duration. The test stimulus is then masked and a response from the user is measured. The response provides information about the user's perception of a characteristic of the test stimulus together with the time taken for the user to respond. These steps are repeated to develop a user profile and cognitive impairment in the user is assessed by comparing the user profile with a reference profile. A method of assessing cognitive impairment of a user includes presenting a visual test stimulus to the user for a pre-determined test stimulus exposure duration. The test stimulus is then masked and a response from the user is measured. The response provides information about the user's perception of a characteristic of the test stimulus together with the time taken for the user to respond. These steps are repeated to develop a user profile and cognitive impairment in the user is assessed by comparing the user profile with a reference profile.

Images may be obtained using a moving camera comprised of two or more rigidly mounted image sensors. Camera motion may change camera orientation when different portions of an image are captured. Pixel acquisition time may be determined based on image exposure duration and position of the pixel in the image array (pixel row index). Orientation of the sensor may at the pixel acquisition time instance may be determined. Image transformation may be performed wherein a given portion of the image may be associated with a respective transformation characterized by the corrected sensor orientation. In some implementations of panoramic image acquisition, multiple source images may be transformed to, e.g., equirectangular plane, using sensor orientation that is corrected for the time of pixel acquisition. Use of orientation correction may improve quality of stitching by, e.g., reducing contrast of border areas between portions of the transformed image obtained by different image sensors.

The present invention provides an image processing method and device. The method comprises the steps of: in a night-scene shooting mode, if it is detected that the current shaking degree of a camera module is larger than a first threshold value, detecting whether images collected by the camera module at present comprise faces or not; if yes, according to the current shaking degree of the camera module, determining standard sensitivity corresponding to each image to be collected; according to the illuminance of the current shooting camera, the standard sensitivity corresponding to each image tobe collected and a preset exposure compensation mode, determining the exposure duration corresponding to each image to be collected; and according to the standard sensitivity corresponding to each image to be collected and the exposure duration, collecting the plurality of images in order and performing combination processing so as to generate a target image. Therefore, the image processing method improves the whole dynamic range and a face brightening effect of the portrait night-scene shooting images, avoids that the scene bright area generates overexposure and brightness distortion and improves the user experience.

The invention discloses an automatic shooting control method and device and an automatic shooting camera, which are applied to a scene in which the automatic shooting camera supplied with power by an alternating current power supply performs shooting of the position of a traffic signal lamp to realize monitoring. The scheme mainly comprises the following steps: determining exposure duration according to current environment brightness; determining a corresponding alternating current power supply phase during shooting with the exposure duration as a starting phase according to the determined exposure duration and a reference standard brightness value needing to be reached by the preset traffic signal lamp in an image obtained by shooting; and controlling to start automatic shooting operation at a moment corresponding to the starting phase. Thus, excessive exposure or insufficient exposure caused by the change of environmental light can be avoided. Meanwhile, the traffic signal lamp can be captured in a time period when the current of the traffic signal lamp is large, so that the image obtained by shooting can reflect the practical brightness of the traffic signal lamp truly, and the monitoring accuracy and validity are improved.

A method and apparatus for the remote, non-invasive detection or characterization of materials manifests a controlled temperature perturbation to the sample material location concurrently with sample interrogation by ionizing radiation and with detection of the response emission energy spectra. This configuration induces and detects Doppler effects manifested at the sample location, allowing material inventory and composition measurements, and allowing a comparative reduction of the exposure duration compared to other isothermal proportional count, coincidence count or spectral analysis techniques. The method and apparatus apply primarily to the detection of elements and isotopes in baggage handling, cargo inspection, chemical characterization, process control and geologic operations, though the method and apparatus are not restricted to these applications. Though the magnitudes of the measured effects are substance specific, the contributing physical processes are not strictly material dependent, allowing method and apparatus applications to almost any high-energy photon-emitting material in multiple applications.

The invention relates to a photolysis-resistant pesticide and application thereof. The photolysis-resistant pesticide comprises the following components in percentages in weight: 0.1-90 percent photosensitive pesticide active ingredient, 0.2-30 percent water-soluble ultraviolet absorbent, 0.2-20 percent oil-soluble ultraviolet absorbent, 0.2-20 percent antioxidant, 1-20 percent surfactant and 4-95 percent solvent or carrier. According to the photolysis-resistant pesticide, the water-soluble ultraviolet absorbent and the oil-soluble ultraviolet absorbent are adopted for synergistic effect, and simultaneously the antioxidant is added; and therefore, at least 30 percent, even more than 50 percent, ultraviolet light can be absorbed, the photolysis-resistance of the photosensitive pesticide active ingredient can be improved, and the half-life of the pesticide can be prolonged; namely, the exposure durations of pests (bacteria, weeds or mites and the like) under the pesticide atmosphere are increased, the using effect of the pesticide is enhanced, and the use amount of the pesticide is reduced; and the photolysis-resistant pesticide can be used for preventing and controlling various pests and diseases of plants, especially crops.

A treatment method for an optical fibre including the steps of exposing the fibre to an atmosphere containing deuterium at a given temperature, concentration and pressure, measuring the attenuation in the fibre as a function of time at least one wavelength, during the exposure of the fibre to an atmosphere containing deuterium, identifying an attenuation maximum after an exposure duration, and stopping the exposure of the fibre to the atmosphere containing deuterium when said duration has elapsed.

A portable control module autonomously positions a target deployed in a combat simulation course. The module chassis is bullet-resistant and angled to deflect errant shots, and encloses a control circuit having an adjustable target exposure delay, an adjustable target exposure duration, means for receiving a trigger signal representing movement of a human body, means for revealing the target when the exposure delay lapses after triggering, means for enabling, only when the target is revealed, hit detection means detecting a shot striking the target, and means for concealing the target responsive to earliest occurrence of the shot detection or lapse of the target exposure duration. The module may include means for relaying the trigger signal to other modules within a cooperative decentralized target control system. A method for the autonomous position control is also disclosed.

A radiometer and method for providing an indication of the amount of time (exposure duration) needed to cause a light curable dental resin composite material to maximally polymerize in response to the application of light from any light-curing source during the preparation of a dental restoration. It describes a radiometer comprising a sample holder of a size designed to hold a sample equivalent of said dental light curable dental material such that the thickness of the sample of light curable material in the sample holder will correspond to the depth of the composite material in the dental restoration; a solid state light sensor; a microprocessor programmed to respond to the output voltage or change in electrical resistance of the light sensor based upon an algorithm defining a mathematical model representative of the change in light transmission through the light curable dental material as a function of the degree to which said light curable dental material is being polymerized. It includes a time display that is responsive to the output signal generated from the microprocessor for displaying the amount of time (exposure duration) needed to maximally polymerize the light curable dental material in the dental restoration.