203 results about "Light level" patented technology

The invention relates to the technical field of image processing, in particular to a low-light and infrared image fused night vision imaging method and system. According to the method, multi-source data collaboration is realized by constructing a dual-band polarization feature cube, a degradation rule of fog scattering on low-light texture is accurately quantified, and a scattering invariance enhanced image is generated; based on fog concentration gradient dynamic partitioning, low-light details and infrared contours are fused in a low-concentration area, polarization state penetrating dense fog is recombined in a high-concentration area, finally, a night vision image with high definition, high scattering resistance and scene adaptability is output, and the identification capacity and monitoring reliability of fog night road targets are improved.

The invention discloses a self-adaptive power generation optimization control system for a greenhouse photovoltaic ceiling, relates to the technical field of ceiling power generation control, and is used for solving the problem that photosynthetic efficiency and yield are affected due to the fact that crops are in a state of insufficient illumination or excessive illumination in a growth stage. The method comprises the following steps: calculating illumination deviation by combining an illumination demand library and an illumination sensor; judging an illumination level according to deviation and photosynthetic response characteristics; collecting a leaf potential and a transpiration rate to calculate photosynthetic efficiency; comprehensively judging whether to adjust the angle of a photovoltaic panel, outputting an execution instruction, setting different control mechanisms, and executing a balance optimization strategy when the power generation efficiency is high. And when the power generation efficiency is low, an intelligent switching strategy is executed, the productivity is preferentially improved, the crop illumination tolerance is considered, the angle is dynamically adjusted, collaborative optimization of agriculture and energy is realized, and the adaptability and the operation efficiency of the system are improved.

A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and / or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications. The wireless communication can also be used to control one or a group of lighting fixtures and transmit sensor data associated with, for example, monitoring space utilization and asset tracking.

To enable obtaining a smoke sensor that can prevent erroneous sensing of smoke.SOLUTION: A smoke sensor (100) comprises: a smoke sensing part (50) for sensing smoke generated in a monitoring area to output a smoke sensing level indicating concentration of the sensed smoke; and a state monitoring part (20) for monitoring a state of an inner face of a flow channel (41) for allowing air in the monitoring area to pass through the smoke sensing part (50), or an object face (31) as a face of an interior of the smoke sensing part (50). The state monitoring part (20) has: a monitoring light-emitting part (21) for emitting light toward the object face (31); and a monitoring light-receiving part (22) for receiving reflected light of light emitted from the monitoring light-emitting part (21), from the object face (31) to output a light-receiving level indicating intensity of the received light as a monitoring light level.SELECTED DRAWING: Figure 2

An intra-oral optical scanning method for intra-oral optical scanning including projecting a pattern, the pattern including at least a first area illuminated by a first color of light and a second area illuminated by a second color of light and at least one non-illuminated area onto an intra-oral feature, making a first image of the first area, the second area and the non-illuminated area differentiating between the first color of light and the second color of light in the first image of the projected pattern, and determining from the image of the non-illuminated area at least one of an ambient light level, a level of scattered light, a level of light absorption and a level of light reflected from at least one of the first area and the second area. Related apparatus and methods are also described.

This disclosure relates to a stimulus-responsive mesh made from hydrogel fibers that provide varying degrees of ventilation depending on environmental conditions. The hydrogel fibers may be arranged into a mesh with openings that change size depending on the degree of swelling of the hydrogel fibers. As the hydrogel fibers of the mesh change (e.g., from a contracted state to / from a swollen state), fluids may flow through the mesh at a variable flow rate that depends on the degree of swelling. The swelling of the hydrogel fibers may be responsive to changes in the ambient environment experienced by the mesh, including, for example, the moisture level at the mesh, the temperature level of the mesh, the chemical composition of the moisture incident the mesh, the presence of magnetic / electric fields near the mesh, and / or the light level at the mesh. In this manner, the ambient environment may determine the degree of swelling of the hydrogel fibers, and changes in the environment may cause moisture to be actively expelled from the mesh. The stimulus-responsive mesh may be used in a variety of products and may be particular useful, for example, for outdoor products such as bicycle helmets, tent screens, and outdoor clothing.

A system for facilitating dark current compensation by weighted filtering is configurable to (i) receive an input dark current image; (ii) generate a corrected dark current image at least by scaling pixel values of the input dark current image based upon ambient light conditions; and generate a weight map comprising a weight value for each pixel of the corrected dark current image. For each pixel of the corrected dark current image, the weight value of the weight map may be based upon a light level of the pixel of the corrected dark current image. The system is also configurable to generate an output image by utilizing the weight map to filter an input image.

A system for facilitating dark current compensation by weighted filtering is configurable to (i) receive an input dark current image; (ii) generate a corrected dark current image at least by scaling pixel values of the input dark current image based upon ambient light conditions; and generate a weight map comprising a weight value for each pixel of the corrected dark current image. For each pixel of the corrected dark current image, the weight value of the weight map may be based upon a light level of the pixel of the corrected dark current image. The system is also configurable to generate an output image by utilizing the weight map to filter an input image.

A system for generating a dark current residual image is configurable to generate a weighted average image by: (i) determining a region-based weight value for each pixel of an input image based upon a light level of a region in which the pixel lies; and (ii) combining the input image with a previous image using the region-based weight values for each pixel of the input image. The system is also configurable to generate a dark current residual image based upon the weighted average image.

This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for portrait video relighting on device using AI-generated HDR maps. A processor obtains an indication of a panoramic view, and generates, based on the indication, a first HDR image. The processor generates a composited relit image based on image data comprising an image frame and an adjusted light level associated with the first HDR image, and outputs another indication of the composited relit image. A processor obtains a first HDR image at a first bit depth, and generates, based on an inverse quantization function and the first HDR image, a second HDR image at a different, second bit depth. The processor determines an adjusted light level of the second HDR image based on the second HDR image and brightness of an HDR panoramic dataset, and outputs an indication of the adjusted light level.

Generally, techniques for image modification for an under-display sensor are described. A computing device including a display, one or more sensors positioned below the display, and one or more processors can be configured to perform various aspects of the techniques. The display can be configured to allow the one or more sensors to operate through the display. The one or more processors can be configured to determine an ambient light level and modify a region of an image based on the ambient light level to obtain a modified image. The region of the image can correspond to pixels of the display that are positioned above the one or more sensors or pixels of the display that are not positioned above the one or more sensors. Then, the one or more processors can interface with the display to output the modified image.

A control method includes encircling a patient appendage with a pressurizable cuff pressurized via a valve, and directing emitted light through a patient appendage to a light sensor. A sensed plethysmogram signal is generated based on the received light level, and the valve is controlled via a closed feedback loop responsive to an error value computed as the difference between the sensed plethysmogram signal and a calibrated setpoint value. An unperturbed error value characteristic is recorded through a first time window, and a random vector perturbation in the closed-loop control space is generated. A perturbed error value characteristic is recorded through a second time window while temporarily adjusting closed-loop control parameters based on the random vector perturbation. Baseline closed-loop control parameters are updated in response to the unperturbed error value characteristic exceeding the perturbed error value characteristic.

The application discloses a kind of fast low-light image enhancement methods based on global frequency domain filtering, it includes the following steps: S1, the image training set of known label is constructed and low-light image enhancement network model;S2, using image training set is trained to low-light image enhancement network model, obtains the low-light image enhancement network model after training;S3, using the low-light image enhancement network model after training is enhanced to low-light image.The application provides a kind of efficient, light level low-light image enhancement network model, can give consideration to the enhancement speed and enhancement effect of low-light image.

The invention discloses a double-barrel low-light telescope and a use method thereof, and relates to the technical field of telescopes, the double-barrel low-light telescope comprises a first lens barrel and a second lens barrel, the first lens barrel and the second lens barrel are rotatably connected through a sleeve assembly, a shaft rod assembly is connected with the sleeve assembly, a locking assembly is arranged on the sleeve assembly, and the locking assembly locks and limits the shaft rod assembly. And the locking assembly is arranged on the shaft rod assembly, and the locking assembly is matched with the sleeve assembly to lock and limit the first lens cone and the second lens cone. According to the invention, the first lens cone, the second lens cone, the sleeve assembly, the shaft rod assembly, the locking assembly and the locking assembly are used in cooperation, and the sleeve assembly, the shaft rod assembly and the locking assembly can be stably installed between the first lens cone and the second lens cone, so that the first lens cone and the second lens cone are used in a combined manner, and the locking assembly is extruded. Therefore, the first lens cone and the second lens cone can be quickly split, and the first lens cone and the second lens cone can be independently used.

A solid-state lighting fixture assembly having a lighting fixture with a socket configured to receive a plug associated with one or more accessories to allow for easy in-field mounting of accessories, e.g., controls, onto installed lighting fixtures. The socket may be internally electrically connected to an auxiliary power output of a driver and / or to a battery power pack within the lighting fixture assembly, thereby providing direct-current voltage power for the accessory and, also, allowing for signal transmission to and from the accessory. Each accessory includes one or more sensors and communication components to provide the connected lighting fixture assembly with specific capabilities including, but not limited to, motion detection, ambient light level detection, ambient temperature measurement and wireless communications. The wireless communication can also be used to control one or a group of lighting fixtures and transmit sensor data associated with, for example, monitoring space utilization and asset tracking.

The invention provides an autonomous vehicle with a video camera that merges images taken a different light levels by replacing saturated parts of an image with corresponding parts of a lower-light image to stream a video with a dynamic range that extends to include very low-light and very intensely lit parts of a scene. The high dynamic range (HDR) camera streams the HDR video to a HDR system in real time—as the vehicle operates. As pixel values are provided by the camera's image sensors, those values are streamed directly through a pipeline processing operation and on to the HDR system without any requirement to wait and collect entire images, or frames, before using the video information.

The invention particularly discloses an intelligent robot system for roller grinding, and relates to the technical field of steel rolling production equipment maintenance. The system comprises a physical platform layer, a visual perception layer, an execution layer and a user layer, the physical platform layer is an arm-track integrated mobile platform, an anti-explosion power battery pack and a battery management module are arranged in the physical platform layer, and mechanical trigger type flexible safety edge touch anti-collision mechanisms are arranged in front of and behind the physical platform layer. The visual perception layer is integrated with a cross laser positioning assembly, an industrial-grade 3D structured light camera, a wide dynamic starlight-grade two-dimensional camera and a distributed light source array; the execution layer comprises an edge calculation unit, an embedded control module and a floating type tail end main shaft; the user layer is a wired control terminal and provides a visual operation interface, parameter configuration, state monitoring, data storage tracing and role-based authority level-to-level management functions. The operation safety and environment are optimized, the roller grinding quality and the operation efficiency are improved, and powerful support is provided for intelligent and few-person upgrading of the iron and steel industry.

A vision screening device displays visual stimuli and captures image(s) of the eye while the visual stimuli is changing over a period of time. The vision screening device uses the images to determine and monitor refractive error, ambient light level(s), pupil size, and gaze angle as the visual stimuli changes over the time period. Based on the refractive error, a determination of hyperopia and / or presbyopia is made. Based on the gaze angle and / or the pupil size, a confidence metric is determined. Based on the confidence metric and / or the determination, a recommendation for the patient is generated and displayed.

The utility model belongs to the technical field of lamps, and discloses a soft light night lamp which comprises a shell, an induction module, a light source plate and a diffusion plate, the induction module is arranged on the upper portion of the front face of the shell, the light source plate is arranged in the shell, and the diffusion plate is arranged at the bottom of the shell; a support is arranged in the shell, and the light source plate is arranged on the bottom face of the support to form downward light emitting. The diffusion plate is arranged at the bottom of the shell, when the sensing module senses human body characteristics, the light source plate is controlled to emit light downwards, the emergent light of the light source plate is emitted by taking the diffusion plate as a medium, so that the emergent light of the soft light night lamp is softer, and the light is prevented from being horizontally emitted to directly irradiate human eyes; and the stimulation to human eyes caused by glare is also avoided.

Aspects of the subject technology may provide local environmental input sensing for an electronic device. Local environment input sensing may include obtaining a local lighting condition estimate for one or more local portions of a physical environment. The local lighting condition may include an ambient light level and / or a light direction of a directional light source. The one or more local portions of the physical environment may be determined based on an identification of a salient region of the physical environment to a user of the electronic device.

The present invention discloses a high-resolution and high-uniformity fiber optic image inverter and its preparation method and application. The preparation method includes: preparing single filaments and sleeve light-absorbing filaments: matching a core material glass rod with a high refractive index and a cladding glass tube with a low refractive index and then performing single-filament drawing to obtain the drawn single filaments, where the filament diameter of the single filaments is Φ2.8 - 4.0 mm; matching a light-absorbing material glass rod and a cladding glass tube with a low refractive index and then drawing them into sleeve light-absorbing filaments, where the filament diameter of the sleeve light-absorbing filaments is the same as that of the single filaments; performing primary multi-filament drawing; performing secondary multi-filament drawing; hot melt pressing and twisting forming. The fiber optic image inverter has a transmittance > 70% and a transmittance uniformity < 5% in the wavelength range of 400 - 700 nm. The fiber optic image inverter can be applied to low-light level image intensifiers.

An electronic device may include a lens module having a tunable lens. The tunable lens may operate in multiple modes, such as a normal mode, a presbyopia mitigation mode, a near focus mode, and a negative power boosting mode. During operation, the electronic device may acquire data and adjust the tunable lens based on the acquired data. The tunable lens may switch from the normal mode to the presbyopia mitigation mode in response to determining that a nearby object is being viewed through the lens module. The tunable lens may switch from the normal mode to the negative power boosting mode in response to a low ambient light level and / or a high eyestrain level. The tunable lens can switch between modes over a transition period. When the tunable lens changes mode, the output device may notify the user.

One embodiment provides a method comprising determining multi-dimensional metadata corresponding to an input image, and determining ambient light information indicative of an ambient light level in a surrounding environment of a display device. The multi-dimensional metadata includes a distribution function of pixels in the input image. The method further comprises determining one or more gains to adaptively compensate for the ambient light level in the surrounding environment based on the ambient light information. The method further comprises generating a tone mapping function based on the multi-dimensional metadata and the one or more gains, and applying the tone mapping function to the input image to generate a tone mapped image that is adaptively compensated for the ambient light level in the surrounding environment. The tone mapped image is provided to the display device for presentation.

A plant growing apparatus including a light diffusion and recycling chamber for growing plants. The plant growing apparatus includes interior sides which define a plant growing space. A plurality of light emitting diodes may be mounted directly or indirectly on each interior side, wherein the light emitting diodes may be configured to emit light into the plant growing space such that each side of a plant disposed in the growing space would receive substantially similar light levels from the bottom to the top of the plant. The plant growing apparatus includes a transport and positioning system comprising to allow selective movement of the mobile plant container to engage with or disengage from the growing chamber and to guide movement of the mobile plant container along a pathway from outside the growing chamber to inside the growing chamber.

An image enhancement system includes an ambient light sensor, a circuit and a processor. The ambient light sensor is operational to measure an ambient light level. The circuit is operational to: generate a histogram based on an input video signal; export the histogram; receive a gray shade look up table; and generate an output video signal by converting a plurality of gray shades in the input video signal based on the gray shade look up table. The processor is operational to: receive the histogram from the circuit; develop the gray shade look up table based on the histogram and the ambient light level; and transfer the gray shade look up table to the circuit.

A system for generating a dark current residual image is configurable to generate a weighted average image by: (i) determining a region-based weight value for each pixel of an input image based upon a light level of a region in which the pixel lies; and (ii) combining the input image with a previous image using the region-based weight values for each pixel of the input image. The system is also configurable to generate a dark current residual image based upon the weighted average image.

Apparatus, methods and systems for lighting control are provided. The apparatus may include a transceiver configured to receive lighting control information from a power source. The apparatus may include lighting control circuitry. The lighting control circuitry may receive a first voltage from the power source. The lighting control circuitry may convert the first voltage into a second voltage. The lighting control circuitry may obtain a light level from the lighting control information. The apparatus may include a connector. The connected may transmit the second voltage and a current corresponding to the light level to a light emitting diode (“LED”) light source. The transceiver, the lighting control circuitry, and the connector may be disposed in a housing. The LED light source may be disposed in a fixture. The lighting control circuitry may be structurally separate from and in electronic communication with the fixture.

The present invention discloses a Eu 2+ -doped single-phase white light-emitting phosphor and a preparation method thereof. The Eu 2+ -doped single-phase white light-emitting phosphor of the present invention has a chemical general formula of Ca 9‑y LiMg 1‑x A 2x / 3 (PO4)7: yEu 2+ , wherein A is selected from Al and / or Ga; x and y respectively represent numerical values within the following ranges: 0.1 ≤ x < 1.0, 0.001 ≤ y ≤ 0.2. The Eu 2+ -doped single-phase white light-emitting phosphor of the present invention, by adding Al and / or Ga, causes local structural distortion, induces the redistribution of Eu 2+ , thereby broadening the full width at half maximum of the emission peak and the emission band, enabling its spectral range to cover the entire visible light region, having good continuity of the emission spectrum and a complete spectrum, and the peak shape of its emission peak being similar to the visible light peak shape of sunlight, improving the luminescence quality of the phosphor, making its emitted light close to the natural light level, and having a good LED white light illumination effect.

The invention discloses a drop impact test device and method for a low-light level night vision device, and the device comprises a drop impact test body (1) which is used for carrying out the drop impact test of the low-light level night vision device, a counterweight hammer seat (2) which is disposed on the drop impact test body (1), a pickup seat (3) which is disposed on the counterweight hammer seat (2), and a vertical transmission guide rail (5) which is disposed on the pickup seat (3). Through the drop impact test body (1), the counterweight hammer seat (2) is connected and supported, through the counterweight hammer seat (2), the low-light-level night vision device is connected and supported, and through the pickup seat (3) and the vertical transmission guide rail (5), the lifting height of the low-light-level night vision device is in a uniform value range. The low-light-level night vision device in a falling impact test state is in a specified height value state under the action of a linear mechanical mechanism, and the technical problems that a falling impact device usually depends on manual operation of a tester and the tester lifts a tested low-light-level night vision device sample and a counterweight hammer to a certain height are solved. Therefore, the drop impact test effect of the tested low-light night vision device sample is improved.

The invention relates to the technical field of optical instruments, in particular to a peripheral imaging device suitable for multiple types of low-light equipment, which comprises a host of a low-light peripheral imaging device main body, a clamping group and an external eyepiece group, in particular to an infrared module which can be externally hung at the front end of an objective lens of the low-light equipment, and can realize the fusion of low-light and infrared images. The night vision device is composed of the host, the clamping set and the external eyepiece set, the difference of the night vision device adaptive to various night vision devices is solved, an image watched by a user from an eyepiece of a low-light level night vision device of a single system is changed into infrared and low-light level fusion imaging, the recognition distance is increased, and the user experience is improved. The infrared fusion module provided by the invention has the functions of target highlighting, outline drawing and breathing display, and when the infrared fusion module is matched with the clamping group to be connected with the low-light equipment for use, the operating distance of the low-light equipment can be increased, so that the capability of quickly discovering a hidden target at night is achieved.