723 results about "Flash light" patented technology

A system and method are provided for capturing a flash image based on ambient and flash metering. In use, a first ambient condition is metered for a first ambient frame. Next, a first ambient capture time is determined based on the metering of the first ambient condition. Further, a first flash condition is metered for a first flash frame, and a first flash capture time is determined based on the metering of the first flash condition. Next, a first ambient frame is captured based on the first ambient capture time. After capturing the first ambient frame, a flash circuit is enabled during an active period and, a first flash frame is captured based on a combination of the first ambient capture time and the first flash capture time. Finally, a final image is generated based on the first ambient frame and the first flash frame.

A positron emission tomography (PET) scanner includes a plurality of gamma radiation detector modules arranged to form a detector ring. Each detector module includes an array of scintillator detectors. Each scintillator detector comprises a monolithic scintillation crystal and a plurality of photodetector arrays, such as silicon photomultipliers (SiPMs). A photodetector array is positioned on at least two nonparallel faces of each scintillation crystal. In some examples, a photodetector array is positioned on each of three orthogonal faces of each scintillation crystal.

A waist fan includes a housing, a fan assembly arranged in the accommodating cavity and configured to guide airflow from the air inlet to the air outlet, a light-emitting assembly, and a control assembly electrically connected to the light-emitting assembly and configured to control the light-emitting assembly to emit flashing light in different colors and / or warning flashing light. The housing includes an accommodating cavity, an air inlet communicated with the accommodating cavity, and an air outlet communicated with the accommodating cavity.

A teleassist system may be used to assist with detecting and responding to an emergency vehicle present within an environment of an autonomous vehicle. The teleassist system can help confirm whether the emergency vehicle is active or inactive based on evaluating sensor data that is captured by one or more sensors of the autonomous vehicle and that is associated with the emergency vehicle. For example, the teleassist system can provide a teleassist operator input confirming whether a detected vehicle is an emergency vehicle based on evaluation of various aspects, including siren, vehicle shape, vehicle color, and / or flashing light emitted by flash device(s) of the vehicle, etc. The teleassist operator input can further include one or more suggested autonomous vehicle control operations that enable the autonomous vehicle to comply with detection of an emergency vehicle.

Interstitial brachytherapy is a cancer treatment in which radioactive material is placed directly in the target tissue of the affected site using an afterloader. The accuracy of this placement is monitored in real time using a urinary catheter that locates the radioactive material according to the radiation levels measured by sensors in the walls of the urinary catheter. A scintillator that is embedded in the walls of the urinary catheter produces light when irradiated by the radioactive material. This light is proportional to the level of radiation at each location. The light produced by each scintillator is carried through optical fibers and then converted to an electrical signal that is proportional to the light and the radiation level at each location. The radioactive material is located according to the plurality of electrical signals. This location can be used as quality control feedback to the afterloader.

A portable electronic device may include an enclosure including a front cover defining a front exterior surface of the portable electronic device and a rear cover defining a rear exterior surface of the portable electronic device. The portable electronic device may further include a rear-facing camera and a rear-facing flash including a light emitting component defining a plurality of illuminable regions. The light emitting component may be configured to illuminate a first subset of the plurality of illuminable regions to illuminate a first field of view and illuminate a second subset of the plurality of illuminable regions, the second subset different from the first subset, to illuminate a second field of view different from the first field of view.

Several new techniques for designing nanophotonic scintillators which lead to optimal performance and novel functionalities. Important design concepts include the use of absorbing structures inspired by solar cells, angularly-selective structures, and metasurfaces. Scintillators based on conventionally overlooked materials (such as GaAs or GaN) are also disclosed, which are designed to reach efficiencies comparable or superior to state-of-the-art conventional scintillators (such as YAG:Ce and LYSO). Such scintillators provide important enhancement of scintillation yield arising from incorporation of nanophotonic patterns. Additionally, nanophotonic scintillators designed in conjunction with image post processing algorithms (such as deconvolution algorithms, tomographic reconstruction, etc.) are disclosed. These scintillators are designed in order to increase robustness, minimize the required dose / scan time or even the number of scans required in scintillation imaging. These new designs optimize the scintillator for optimal reconstruction.

This document describes techniques and apparatuses for computational photography under low-light conditions for an image-capture device on a mobile computing device. In aspects, described are techniques and apparatuses for an image-capture device to utilize sensor data in determining whether to enable flash photography or capture multiple images of the scene without use of a flash under low-light conditions. In other aspects, an image-capture device may utilize device data in determining whether to enable flash photography or capture multiple images of the scene without use of a flash under low-light conditions. The disclosed techniques and apparatuses may provide improved computational photography under low-light conditions for an image-capture device on a mobile computing device.

Various embodiments relate to a band flash butt welding machine by which it is possible to weld band faces of band ends of at least one band, in particular a saw band, to each other. The band flash butt welding machine comprises clamping elements for clamping the band ends. Furthermore, the band flash butt welding machine comprises aligning elements for aligning the band ends. The second clamping elements can be moved by a drive relative to the first clamping elements in the direction of a longitudinal axis. Two aligning elements are fixedly connected to one another by a coupling device, in particular a bridge part. The coupling device defines the relative alignment of the aligning elements. The second clamping element can be moved relative to the two aligning elements. This design is advantageous for a changeover of the band flash butt welding machine for band ends having a different geometry.

The invention discloses an online prediction method for the ignition loss of light-burned magnesia powder in the flash light-burning process of magnesite, which comprises the following steps: analyzing the flash light-burning process of magnesite, measuring the ignition loss of the light-burned magnesia powder as a dominant variable, and establishing a training sample set by taking important parameters influencing the dominant variable as auxiliary variables; carrying out standardization processing on training sample set data, carrying out dimension reduction processing on input data by utilizing a PCA method, and eliminating a redundant relationship among auxiliary variables; establishing a prediction model based on a WOA-XGBoost method, and performing iterative training in combination with training sample set data to obtain an ideal model for predicting the ignition loss rate of the light-burned magnesia powder; and correcting the ideal model of the light-burned magnesia powder ignition loss by adopting a method of combining deviation compensation correction and instant learning. The prediction model provided by the invention can predict the ignition loss of the light-burned magnesia powder on line as a result, is used for predicting the product quality in the flash light-burning process of the magnesite, and is used for feeding back and adjusting a production process link.

To provide an LED driver and an LED lighting system, capable of reducing the discomfort of users.SOLUTION: An LED driver includes a DC-DC converter 11 and a strobe circuit 12. The strobe circuit generates a low-frequency modulation signal. The DC-DC converter is connected to the strobe circuit and provides an adjustable operating current to an LED light source according to a DC electrical signal and the low-frequency modulation signal. The operating current includes a DC current signal corresponding to the electrical DC signal and a low-frequency AC current signal corresponding to the low-frequency modulation signal. A frequency of the low-frequency AC current signal is 25-100 Hz, and a current ripple factor, equaling a difference of a maximum value and a minimum value of the operating current divided by a sum of the maximum value and the minimum value, is less than 8%.SELECTED DRAWING: Figure 3

The invention relates to the technical field of railway safety protection monitoring, in particular to an intelligent monitoring device for a railway tunnel protective door. According to the method, the characteristic that piston wind is generated when a train passes through a tunnel, so that air pressure changes remarkably is utilized, the air pressure transmitter collects the air pressure in real time and transmits the air pressure value to the edge calculation unit, the train passing state is detected, and under the condition that the air pressure changes remarkably after the train passes, the train passing state is detected. The image acquisition device is triggered to execute the photographing function with the flash lamp, the safety of the train is not influenced, the method is simple and easy to implement, convenient and reliable, the problem that the driving safety is influenced when a conventional monitoring device works is solved, 24-hour uninterrupted photographing and image recognition are not needed, and the dependence on network data transmission and network server hardware equipment is reduced.

The invention belongs to the technical field of power transmission line on-line monitoring, and particularly relates to a power transmission line bird sound and bird damage early warning identification and active expelling method and system based on multi-modal perception, and the method comprises the steps: employing a multi-modal perception unit to monitor the surrounding environment of a power transmission line tower, and enabling a microwave infrared detector to detect a moving object, activating a holder and a voiceprint sensing module, and collecting image and voiceprint data; comprehensively judging whether a target is a threatening bird or not through a multi-modal data fusion decision module in combination with infrared microwave features, a voiceprint comparison result and an image recognition result; if the bird is judged to be a threatening bird, controlling an audible and visual alarm module and / or a flash lamp module to execute a repelling action according to a current period silence strategy; monitoring bird behaviors in real time, and if the birds fly away from the target area, terminating the repelling action and recovering the low-power-consumption standby mode; and uploading the image and voiceprint data in the expelling process to a server, optimizing the recognition model and updating the expelling strategy.

The invention discloses a pointing method, interaction equipment and pointed equipment, and belongs to the field of man-machine interaction. In order to avoid adding additional parts to a pointed area, a flickering and directive light source is arranged in the pointing device, and the pointing device emits light to the pointed area so as to form flickering light spots in the pointed area; the field of view of an event-based sensor completely covers or at least partially covers the pointed area, and according to the event-based sensor, obtaining pixel coordinates indicating flicker spots; and mapping a pixel coordinate indicating a flicker light spot to the pointed area so as to indicate the current pointing of the pointing device. The pointed device or area does not need to be modified, a user can selectively achieve relative pointing or absolute pointing of the pointed area through the pointing device, and the method is particularly suitable for a projector and wider in application range.

A photometric process measurement arrangement and a photometric measurement method The invention refers to a photometric process measurement arrangement (10) comprising a photometric immersion probe (20) comprising a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising a separate wavelength-selective detection element (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70), The photometer control (80) comprises: An impulse signal integrator (819, 829, 839) for integrating the electric impulses having the impulse intensity (Ui) generated by the detection element (71, 72, 73) of one impulse integration cycle (204; 221; 264), a measurement cycle control (90) for adapting the total number of 20 integrated cycle impulses of an impulse integration cycle (204;221;264) to the impulse intensity (Ui) of the single electric impulses, an A / D-converter (81, 82, 83) for converting the voltage of the impulse signal integrator (819, 829, 839) in an optional compulsory A / D conversion interval (100) after the impulse integration cycle (204;221;264), and an A / D-conversion management module (150) for balancing the total number of A / D conversion intervals (100-111) within a time frame (F), whereas the number of supplementary A / D conversion intervals (101-111) after the compulsory A / D conversion interval (100) depends on the length of the corresponding impulse integration cycle (204; 221; 264).

A system for diagnosing ocular diseases of a subject includes a mobile device (e.g., a smart phone, a tablet) to facilitate acquisition of imagery of the subject's eyes and a backend server to evaluate the imagery using a machine learning model to determine if the subject's eyes are health or unhealthy. The mobile device may execute an application to facilitate the acquisition of imagery for evaluation. In one aspect, the application may gradually ramp up the intensity of a flash when capturing imagery of the subject to reduce or, in some instances, mitigate delays caused by the camera adjusting its white balance. In another aspect, an external flash device may be coupled to the mobile device to provide a light source that is more powerful and more responsive than conventional flash devices.

The power having a frame, a main power base mounted on the frame, a battery package removably mounted on the main power base and electrically coupled with the main power base, a flashlight removably mounted on the battery package and electrically coupled with the battery package, a solar panel electrically coupled with the main power base and the battery package, and a remote control wirelessly connected with the main power base, the battery package and the solar panel. The power system has a base assembly, a head assembly, an electrical system, an electrical assembly, a solar panel and a remote control, the electrical assembly is housed within the base assembly, the electrical system is housed within the head assembly, the solar panel is electrically coupled with the electrical system and the electrical assembly, the remote control is wirelessly connected with the electrical assembly, the electrical system and the solar panel.

In an embodiment, a method includes: receiving ambient sound; determining if the ambient sound includes a siren; in accordance with determining that the ambient sound includes a siren, determining a first location associated with the siren; receiving a camera image; determining if the camera image includes a flashing light; in accordance with determining that the camera image includes a flashing light, determining a second location associated with the flashing light; 3D data; determining if the 3D data includes an object; in accordance with determining that the 3D data includes an object, determining a third location associated with the object; determining a presence of an emergency vehicle based on the siren, detected flashing light and detected object; determining an estimated location of the emergency vehicle based on the first, second and third locations; and initiating an action related to the vehicle based on the determined presence and location.

A deformable electronic device includes a flexible display supported by a deformable housing and one or more sensors to detect a wrapped geometric form factor while in a flashlight mode of operation. The device presents flashlight output on the flexible display in a first location and detects gesture input translating the device in three-dimensional space. The device moves the flashlight output to a second location as a function of a change in orientation resulting from the translating. The device includes processors operable with sensors to dynamically adjust the flashlight output based on the device's orientation, ensuring effective illumination without causing glare to the user.

The invention refers to a photometric process measurement arrangement (10) with a photometric immersion probe (20). The photometric immersion probe (20) comprises a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70). The photometer control (80) comprises several impulse signal integrators (819, 829, 839) for integrating the electric impulses generated by the detection elements (71, 72, 73), several A / D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (819, 829, 839) when high-precision-converting trigger ports (H) of the A / D-converters (81, 82, 83) are triggered, and a measuring cycle control (90) with an integration target memory (94) memorizing an integration target voltage value (Ut). The photometer control (80) is provided with a high-precision-request port (93) for synchronously triggering the high-precision-converting trigger ports (H) of all A / D-converters (81, 82, 83) after the voltage of the first of all impulse signal integrators (819, 829, 839) has exceeded the memorized integration target voltage value (Ut).

The utility model provides an auxiliary flash lamp and a flash lamp system. The flash lamp system comprises a main flash lamp and the auxiliary flash lamp. A first magnetic piece is fixed on the main flash lamp; a second magnetic piece is fixed on the auxiliary flash lamp; the second magnetic piece and the first magnetic piece can be magnetically attracted, so that the auxiliary flash lamp is detachably connected to the main flash lamp. According to the flash lamp system provided by the utility model, the auxiliary flash lamp can be conveniently mounted on the main flash lamp, so that the mounting and dismounting efficiency between the auxiliary flash lamp and the flash lamp can be improved, the operation of mounting the auxiliary flash lamp on the main flash lamp is simplified, and the use experience of a user is improved.

The annular flash lamp comprises a main body part, an annular lamp body and a bottom fixing piece, the annular lamp body is rotationally connected to the upper end of the main body part, and the bottom fixing piece is fixedly connected to the lower end of the main body part. The modular design of the main body part, the annular lamp body and the bottom fixing part improves the practicability and portability of the equipment, and facilitates the maintenance and part replacement of the annular flash lamp for the camera. The rotary connection structure of the annular lamp body and the main body part realizes multi-angle free adjustment, and can meet the control requirements of different shooting angles and light directions. The bottom fixing part is fixedly connected to the lower end of the main body part and can be fixed to supporting equipment such as a camera hot shoe and a tripod, the stability of the annular flash lamp for the camera in various shooting scenes is ensured, and accidental displacement or falling in the shooting process is effectively prevented. According to the annular flash lamp for the camera, the annular flash lamp for the camera can be provided, and the annular flash lamp is simple in structure and convenient to carry by a user.

The embodiment of the invention discloses an image acquisition method, a storage medium, equipment and a computer program product, relates to the field of image acquisition, takes the traffic information acquisition sub-field as an example, and solves the problem that a license plate is easy to overexposure during front light supplement of a light supplement lamp. And determining a target area where the first part of which the reflectivity of the object is greater than the threshold value is located in the to-be-acquired image, and when image acquisition is carried out, the exposure time of a pixel corresponding to the target area is less than the exposure time of other pixels in the image. In the method provided by the invention, through a partition exposure mode of short exposure of the first part (such as a license plate) in the target area of the image and long exposure of the first part in the image in other areas, even if the light supplement lamp is adjacent to the camera to carry out front flash light supplement, the exposure time of the target area is relatively short, overexposure of the target area is not caused; and the imaging effect of the target area is ensured.

The invention relates to a refractive error detection system and method. The refractive error detection system comprises a plurality of lens assemblies and a mobile terminal device. Wherein the multiple groups of lens assemblies are arranged on the front surface or the rear surface of the mobile terminal equipment and are in communication connection with the mobile terminal equipment; wherein each group of lens assemblies comprises a flash lamp, a first camera and a second camera which are arranged along the astigmatism meridian corresponding to each group of lens assemblies, and the lens assemblies are used for collecting eye images; and the mobile terminal equipment is used for inputting the eye image into the completely trained refractive error detection model and acquiring a refractive error detection result output by the refractive error detection model. Through the method and the device, the problems of relatively high detection cost and relatively low detection efficiency of the refractive error in related technologies are solved, and the technical effects of reducing the detection cost of the refractive error and improving the detection efficiency of the refractive error are achieved.

A method for adjustable error correction in a storage cluster is provided. The method includes determining health of a non-volatile memory of a non-volatile solid-state storage unit of each of a plurality of storage nodes in a storage cluster on a basis of per flash package, per flash die, per flash plane, per flash block, or per flash page. The determining is performed by the storage cluster. The plurality of storage nodes is housed within a chassis that couples the storage nodes as the storage cluster. The method includes adjusting erasure coding across the plurality of storage nodes based on the health of the non-volatile memory and distributing user data throughout the plurality of storage nodes through the erasure coding. The user data is accessible via the erasure coding from a remainder of the plurality of storage nodes if any of the plurality of storage nodes are unreachable.

Traffic monitoring system (100) for monitoring a traffic scene, preferably from an interior of a vehicle (200), comprising: - comprising an upper part (40) ◯ a measuring unit (41) which is designed to measure at least one parameter of an object, in particular a passing vehicle, ◯ a flash (42) which can be arranged at a distance from a first side wall (41.1) or a second side wall (41.2) of the measuring unit (41), - a lower part (20) arranged below the upper part (40), - a positioning unit (30) which is arranged between the upper part (40) and the lower part (20), wherein the upper part (40) is adjustable relative to the lower part (20) by the positioning unit (30), whereby at least two different measuring configurations (I, II) are provided for measuring.

The present technology addresses the need for color-consistent photos and videos by comparing a frame captured under ambient lighting and a frame captured using flash lighting to adjust the frame to appear as if the ambient lighting were substantially removed. Since the ambient lighting is the source of the inconsistent appearance of color, processing the frame to appear as if it were presented under consistent lighting conditions yields a color-consistent frame that can be more useful in the medical context or other contexts where consistent color is more important than ambiance created from ambient lighting. The present technology can also address unwanted shadows as well. Since the present technology adjusts the frame to appear as if the ambient lighting were substantially removed, the source of the lighting causing the shadows is also removed.

The utility model discloses a flexible blocking comprehensive management and control system, which comprises two equipment main bodies, the two equipment main bodies are symmetrically arranged on the two sides of a road respectively, and the two equipment main bodies are provided with warning units which are matched for use and are used for providing multidirectional video monitoring, flashing light, light curtain wall and sound multidimensional warning. The flexible blocking system solves the problems that an existing flexible blocking system is single and cannot comprehensively monitor road surface conditions and grasp road condition information, the device bodies are arranged on the two sides of a road respectively for warning, the flexible blocking system can adapt to accident roads of various widths, the two device bodies guarantee warning signal coverage of the left side range and the right side range respectively, and the warning effect is good. Therefore, road surface conditions can be monitored comprehensively and road surface information can be mastered. And through multi-dimensional stimulation factors such as multi-directional video monitoring, a flashing lamp, a light curtain wall and a sound lamp, emergency risk avoiding safety induction is accurately provided for a driver and passengers.

The invention relates to a vehicle rearview mirror intelligent interaction and control method and system.The system comprises a position acquisition module, an instruction acquisition module, an intelligent interaction module and an instruction execution module, when a user enters a preset distance from a vehicle, the rearview mirror is controlled to swing and / or send out a double-flash light signal, and the intelligent interaction module is controlled to interact with the instruction execution module; wherein swinging of the rearview mirror is similar to interaction between an owner and a pet, so that the man-machine interaction effect of the rearview mirror is achieved. Besides, the intelligent interaction module is used for defining a conversion mapping relation between an interaction instruction and an operation instruction, and when the rearview mirror receives the interaction instruction of gestures and / or voice sent by a user, conversion between the interaction instruction and a control instruction of vehicle actions is achieved through the intelligent interaction module. Intelligent control over automatic starting, vehicle door opening, air conditioner starting and the like is achieved, the man-machine interaction effect of the rearview mirror is further enhanced, and a brand-new vehicle man-machine interaction feeling is brought to a user.