75 results about "Optical depth" patented technology

A display system and method for generating virtual images or light field images includes, in some embodiments, a display and a field-evolving cavity. The field-evolving cavity modulates the optical depth of the virtual image. In some embodiments, the components of the display system are curved. The focal plane of the virtual image is curved and may approximate a portion of a human horopter. In some embodiments, the display system is integrated into a part of a vehicle. Components of the display system may move relative to each other, such that the display system is collapsible or foldable when not in use.

The invention discloses a deep learning inversion AOD-assisted atmospheric correction-based method and device and a medium, and relates to the field of atmospheric remote sensing and deep learning cross technologies, and the method comprises the steps: constructing a multi-type training sample set fusing actual measurement and physical simulation data, and carrying out mass screening and layering processing to obtain a multi-type training sample set; obtaining a pre-training sample, a fine tuning sample and an extreme scene sample matched with the satellite remote sensing data; establishing a deep learning network model taking data loss and inverse operator constraint loss weighted fusion as a total loss function, and adopting a cross-satellite transfer learning strategy to sequentially complete pre-training, satellite exclusive fine tuning and extreme scene enhancement training to obtain a trained aerosol optical thickness inversion model; radiometric calibration, cloud detection, geometric correction preprocessing and input model reasoning calculation are carried out on satellite remote sensing original data, post-processing and quality grading are carried out on an output result, and an aerosol optical thickness inversion result used for assisting atmospheric correction is obtained.

The disclosure relates to a method and a device for the production of an optical element from a curable material by using an additive manufacturing technology. According to the disclosure, this method comprises: A—providing a curable material; B—curing said curable material inside sliced outlines (C1) whose geometry are determined according to the geometry of said optical element, said optical element comprising at least: a first volume element (V1) and a second volume element (V2), by forming the first volume element (V1) by irradiating the curable material with at least a first curing surface energy (E1) with a first light depth penetration value within the curable material (Dp1), and forming the second volume element (V2) by irradiating the curable material with at least a second curing surface energy (E2) with a second light depth penetration value within the curable material (Dp2), wherein said second light depth penetration value within the curable material (Dp2) is different from the first light depth penetration value within the curable material (Dp1).

The embodiment of the invention provides a remote sensing image atmospheric correction method and system for an ocean near-shore scene, and relates to the technical field of ocean remote sensing image atmospheric correction. According to the method, after remote sensing data is obtained, solar flare correction is executed by extracting a target mask and using a secondary simulation model of a satellite signal in a solar spectrum. And then a multi-band darkness index is calculated, and an optimal aerosol optical thickness value is inverted through a radiation transmission model. And calculating the atmospheric correction coefficient of each wave band according to the optimal aerosol optical thickness value so as to generate correction result data. According to the method, on the basis of robust flare correction of the SWIR proxy, scene-adaptive flare proxy is constructed by utilizing water body reflection and path radiation physical characteristics of the SWIR under a deepwater condition, and flare deduction is realized. Inversion is carried out through multiband combined darkness indexes, and the spectral characteristics of the deep water body reflected in the visible spectrum are utilized, so that single-band random noise is smoothed, and the accuracy of an AOT estimation result is improved.

In various examples, optical depth estimation for interior space monitoring systems and applications is disclosed. Absolute 3D depth estimates from monocular image data may be generated using a machine learning model using 3D geometry priors and a joint learning framework that combines depth estimation with object segmentation. Three-dimensional geometry priors provide surface-level information that enriches the model's understanding of the relevant spatial geometry and resolves scale ambiguity in monocular depth estimation within automotive in-cabin environments. The model may include a common (e.g., shared) encoder stage that outputs features extracted from an optical image sensor feed to separate decoder stages that include a depth estimation decoder and a segmentation decoder. Joint learning for depth estimation and segmentation tasks during training achieves a more nuanced understanding of the in-cabin environment, leading to significantly improved depth accuracy.

The invention discloses a CO2 sensitive wave band satellite hyperspectral atmospheric radiation transmission process simulation method and device. The method comprises the following steps: screening a CO2 sensitive wave band in a satellite detection wave band; an absorption coefficient lookup table is generated based on the wavenumber-pressure-temperature three-dimensional grid, local recalculation or interpolation calculation is dynamically selected through interpolation confidence evaluation, and the atmospheric stratified gas optical thickness is obtained; the reanalysis data and the aerosol characteristic parameters are fused, and an aerosol vertical profile and multi-mode particle size distribution are constructed; setting atmospheric radiation transmission boundary conditions; calculating the hyperspectral radiation intensity in the target direction by using a radiation transfer solver; a simulated radiance is generated in conjunction with the instrument response function. According to the method, a dynamic interpolation-recalculation hybrid mechanism is innovatively introduced, the balance of calculation precision and efficiency is controlled through a confidence coefficient threshold value, a multi-source aerosol parameterized model is coupled, high-fidelity simulation spectrum data can be quickly generated, and precision verification and algorithm optimization of satellite CO2 inversion are supported.

The present invention discloses a gas chamber temperature control method for a SERF inertial measurement device based on second harmonic generation. The method utilizes gas chamber optical depth information obtained by the SERF device's own detection system to perform feedback regulation on the laser heating power of the atomic gas chamber, thereby achieving real-time and stable control of the atomic density or temperature in the gas chamber. This avoids the magnetic field interference introduced by the use of thermal resistors as temperature sensors in existing solutions, thereby achieving truly non-magnetic, all-optical gas chamber heating and its control system, and helping to improve the sensitivity of the SERF inertial measurement device.

The application discloses a method for inverting marine aerosol optical depth by using spaceborne lidar noise, belongs to the technical field of laser remote sensing, and is used for quantitatively inverting aerosol optical depth. Under the premise that system hardware parameters of the spaceborne lidar and total background noise data detected by the spaceborne lidar, environmental parameters of a corresponding region and moment are given, a noise model of solar radiation items corresponding to water surface white froth diffuse reflection and water surface specular reflection, a water-leaving noise model (a noise model of solar radiation items of water body backscattering), and an atmospheric noise model (a noise model of solar radiation items of Rayleigh scattering of atmospheric molecules and Mie scattering of aerosol particles) are respectively constructed. Water surface noise, water-leaving noise and atmospheric Rayleigh scattering noise are removed from total noise rate of the atmosphere top detected by the lidar, and aerosol scattering noise results are obtained. Finally, marine aerosol optical depth of a satellite transit region and moment is quantitatively inverted by using the aerosol scattering noise results and the aerosol scattering noise model.

The application discloses a kind of remote control step puncture robot systems, including front-end robot trolley, calibration mark module, optical depth navigation camera, remote control terminal module, patient fixation device, front-end robot trolley is connected with optical depth navigation camera by cable or wireless communication mode communication, the application also provides a kind of remote control step puncture robot system operation method.Compared with prior art, when using the puncture positioning of remote control needle insertion mechanism in the system of the application, the doctor can return to scanning control room without being in the X-ray radiation range all the time, operates needle insertion mechanism in control room and can view the actual image returned by CT machine, if there is deviation, puncture angle can be adjusted in time, the application can enable the doctor to operate outside CT room to avoid receiving the radiation of X-ray, while also conveniently realize accurate puncture, improve the operation efficiency, reduce the risk of secondary injury of patient during operation.

Disclosed is a depth imaging system with a light source; a depth sensor comprising direct Time-of-Flight (dToF) pixels and indirect Time-of-Flight (iToF) pixels; and processor(s) configured to: employ the light source to emit an intensity-modulated light pulse towards objects in a real-world environment; obtain dToF data indicative of time taken by the intensity-modulated light pulse to reach the dToF pixels after being reflected by the objects; obtain iToF data indicative of phase shifts undergone by the intensity-modulated light pulse upon reaching the iToF pixels after being reflected by the objects; determine optical depths for the dToF pixels; determine optical depths for the iToF pixels; and generate a depth image from the optical depths of the dToF pixels and the optical depths of the iToF pixels.

The present invention discloses a method for retrieving aerosol optical depth based on multi-band satellite data. The method comprehensively considers the influence of surface anisotropy and the variation of aerosol types, constructs a database of bidirectional reflectance distribution function (BRDF) of the surface, a candidate aerosol model for each region, and a cost function based on the retrieval results of AOD (550nm) for each band, simplifies the iterative calculation of AOD retrieval, realizes the simultaneous determination of AOD and aerosol types, and improves the retrieval accuracy of AOD.

An optical apparatus includes first active optical element (AOE) for first eye of user; eye-tracking means; and processor(s) configured to: process eye-tracking data for determining gaze directions of both eyes; determine given optical depth of gaze point at which user is gazing; detect when given criterion is satisfied, such satisfaction being when gaze directions of both eyes at another optical depth is different from given optical depth of gaze point, and / or user input for activating convergence insufficiency correction mode (CICM) is received; and when it is detected that given criterion is satisfied, activate CICM; determine first prismatic correction (PC) to be applied by first AOE; and generate first drive signal to drive first AOE for applying first PC, to optically shift light incident thereupon.

In some embodiments, a display system and method for generating a virtual or light field image includes a display and a field-emitting cavity. The field-emitting cavity modulates the optical depth of the virtual image. In some embodiments, the components of the display system are curved. The focal plane of the virtual image is curved and can approximate a portion of a human horopter. In some embodiments, the display system is integrated into a portion of a vehicle. The components of the display system can move relative to each other such that the display system is foldable or bendable when not in use.

The application discloses a vegetation dark background aerosol inversion method and device based on physical and machine learning fusion and a medium, relates to the field of aerosol optical depth inversion, and comprises the following steps: constructing a sample library based on AVHRR / MERSI observation data and MODIS surface reflectance product data; adopting a machine learning algorithm to establish a surface reflectance relationship model with medium / short-wave infrared apparent reflectance, NDVI and multiple angle data as input and label red band surface reflectance as output; determining the label red band surface reflectance by adopting the surface reflectance relationship model for satellite observation data to be processed, calculating the red band apparent reflectance, and then obtaining a set of dark background pixels to be inverted; for any dark background pixel to be inverted, a preset lookup table is called, the red band apparent reflectance is matched with the apparent reflectance in the preset lookup table, and the aerosol optical depth is determined. The application can realize high-precision AOD inversion.

The application discloses a prediction method for radiation refrigeration capacity by using aerosol optical thickness and precipitable water amount, comprising the following steps: S10, obtaining corresponding hourly weather data according to weather data; S20, judging whether the local latitude is greater than 33°, if yes, entering step S30, S30, calculating the local precipitable water amount (PWV H ) by using a high-latitude calculation method; if no, entering S40, S40, calculating the local precipitable water amount (PWV L ) by using a low-latitude calculation method; S50, calculating atmospheric radiation according to the calculated precipitable water amount (PWV H or PWV L ); S60, correcting the atmospheric radiation calculated in S50 according to the aerosol optical thickness in the weather data; and S70, calculating the radiation refrigeration capacity according to the atmospheric radiation corrected in S60.

The application provides a kind of improved remote sensing ecological index calculation method based on space-time data fusion, the method comprises the following steps: collecting remote sensing data of the study area;The collected remote sensing data is pretreated;The water in the processed remote sensing data is masked and treated;The remote sensing data after pretreatment is spatiotemporally fused;According to the remote sensing data after fusion processing, the index data for representing the improved remote sensing ecological index is calculated respectively;Get aerosol optical depth to represent air quality and nighttime light data to represent human activity intensity on the gee platform, and resample the two index data;The index data is parameter standardized, and the standardized data is obtained;Principal component analysis is used, and principal component extraction is carried out according to the standardized data, to obtain the evaluation index result.The application can improve the spatiotemporal resolution of data through space-time data fusion technology, and solve the problem of lack of comprehensiveness in index selection of remote sensing ecological index.

A method for measuring alkali metal atom equilibrium spin polarizability based on three-axis magnetic field steady-state response comprises the following steps: firstly, adjusting a device to a normal working state, then applying direct-current magnetic fields in x, y, y and z directions, changing the size of the magnetic field in the z direction, fitting the ratio of two outputs of the device with the square of the magnetic field applied in the z direction to obtain the size of the total relaxation rate, and finally measuring the alkali metal atom equilibrium spin polarizability. Obtaining the pressure broadening of the alkali metal air chamber by using the optical depth of the detection light at a low temperature, then changing the power of the detection light at a normal working temperature, establishing a transfer coefficient by using the pressure broadening and a fitting slope, and finally applying a direct-current magnetic field on a y axis and changing the size of the direct-current magnetic field, and fitting the relationship between the output of the device and the By-fit, so as to obtain the alkali metal air chamber. The final balance spin polarizability is obtained by combining the transfer coefficient, the SERF state required by normal work of the system is not damaged, the influence of temperature is avoided, the measurement error is small, and a more accurate measurement means is provided for further optimizing an SERF magnetic field measurement device to improve the sensitivity of the SERF magnetic field measurement device.

The invention relates to a display system for a vehicle, wherein the display system has a display field (4) with four outer edges and at least two mirror modules, wherein a reflection chamber (6a, 6b) is arranged on at least two mutually parallel outer edges of the display field (4), wherein front sides as front base sides of the two parallel reflection chambers (6a, 6b) are covered by at least one front mirror module and rear sides as rear base sides of the two parallel reflection chambers (6a, 6b) are covered by at least one rear mirror module, wherein an inner side of each reflection chamber (6a, 6b) is bounded by a wall designed as an outer edge of the display field (4), wherein an outer side of each reflection chamber (6a, 6b) is bounded by a further wall, wherein light sources (12) are arranged on at least one of the two walls of each reflection chamber (6a, 6b), wherein the light sources (12) are configured toto emit light into the respective reflection chamber (6a, 6b), wherein the two mirror modules are configured to reflect the light in the respective reflection chamber (6a, 6b), wherein reflections of the light through the at least one mirror module arranged on the front sides are visible and configured to create an optical depth effect for the display field (4).

A display system and method for generating virtual images or light field images includes, in some embodiments, a display and a field-evolving cavity. The field-evolving cavity modulates the optical depth of the virtual image. In some embodiments, the components of the display system are curved. The focal plane of the virtual image is curved and may approximate a portion of a human horopter. In some embodiments, the display system is integrated into a part of a vehicle. Components of the display system may move relative to each other, such that the display system is collapsible or foldable when not in use.

The application discloses a model rendering method and device, electronic equipment and storage medium. The method comprises the following steps: acquiring a fluid model comprising a plurality of fluid model parts surrounded by solid models and fluid density control information of the fluid model; determining a target fluid model part to be rendered on the fluid model according to a fluid model part through which a view ray of a virtual camera passes on the fluid model; setting a bounding box for a target solid model corresponding to the target fluid model part, and determining a ray path of the view ray in the bounding box; performing ray stepping analysis according to the fluid density control information and the ray path, determining optical depth information, and rendering the target fluid model part. Based on this, the fluid model is divided into a plurality of fluid model parts surrounded by solid models, so that the fluid model rendering mode is suitable for various fluid distribution scenes, and in the scene where the fluid distribution is uneven, the performance consumption is reduced, the rendering efficiency is improved, and the user experience is improved.

A system configured to operate in an unknown, possibly texture-less environment, with possibly self-similar surfaces, and comprising a plurality of platforms configured to operate as mobile platforms, where each of these platforms comprises an optical depth sensor, and one platform operates as a static platform and comprising at least one optical projector. Upon operating the system, the static platform projects a pattern onto the environment, wherein each of the mobile platforms detects the pattern or a part thereof by its respective optical depth sensor while moving, and wherein information obtained by the optical depth sensors, is used to determine moving instructions for mobile platforms within that environment. Optionally, the system operates so that every time period another mobile platform from among the plurality of platforms, takes the role of operating as the static platform, while the preceding platform returns to operate as a mobile platform.

An optical element includes a substrate and an interferometric reflection-reducing layer system on at least one surface of the substrate. The layer system includes a stack of at least four successive layer packets, wherein each layer packet includes a first sub-layer with a first optical depth and a second sub-layer with a second optical depth which differs from the first optical depth. The refractive index of each first sub-layer nearer the substrate is greater than the refractive index of each second sub-layer further away from the substrate, of the respective stack, wherein the layer system has a brightness, a colorfulness, and a hue angle of a residual reflection color. The value of a change in the hue angle of the residual reflection color in a range of a viewing angle with the boundary values of 0° and 30° relative to a surface normal to the layer system is smaller than the value of a change in the colorfulness in the range of the viewing angle.

The invention discloses an aerosol optical thickness inversion method and device and a medium. The method comprises the steps that an inversion sample data set is determined according to meteorological station data in an aerosol optical thickness pixel of a satellite load, and the inversion sample data set comprises observation visibility, altitude, water vapor content and aerosol optical thickness; performing normalization processing on the inversion sample data set to obtain a normalized inversion sample data set; training to-be-solved parameters of a pre-constructed target function according to the normalized inversion sample data set by adopting a deep neural network algorithm, and determining the to-be-solved parameters of the target function; and calculating an aerosol optical thickness inversion result of the to-be-predicted meteorological station according to the inversion data of the to-be-predicted meteorological station, the to-be-solved parameters and the objective function.

A method for measuring the equilibrium spin polarizability of alkali metal atoms based on the steady-state response of a triaxial magnetic field is proposed. First, the device is adjusted to its normal operating state. Then, DC magnetic fields are applied in the x, y, and y, z directions, with the magnitude of the magnetic field in the z direction varied. The ratio of the device outputs in the two applications is fitted with the square of the applied magnetic field in the z direction to obtain the total relaxation rate. Next, the pressure broadening of the alkali metal gas cell is obtained at low temperature using the optical depth of the detection light. Then, at the normal operating temperature, the power of the detection light is varied, and the transfer coefficient is established using the pressure broadening and the fitting slope. Finally, a DC magnetic field is applied along the y-axis with varying magnitude, and the device output is fitted with the B... y‑fit The relationship between these factors, combined with the transfer coefficient, yields the final equilibrium spin polarization. This method does not disrupt the SERF states required for normal system operation, is unaffected by temperature, and has small measurement errors. It provides a more accurate measurement method for further optimizing SERF magnetic field measurement devices to improve their sensitivity.

This invention discloses a method for measuring gas velocity in absorption spectra by constructing and matching absorption peak image features. The method includes: performing multiple phase-shift downsampling on a detected wavelength-modulated laser signal; reconstructing the multiple phase-shift sequences to obtain a two-dimensional grayscale image matrix containing the direct absorption spectrum profile; sharpening the two-dimensional grayscale image matrix extracted from the laser signal where the flow field velocity is zero to obtain an image template characterizing the absorption peak position; matching the position of the image template from the two-dimensional grayscale images obtained from laser detection signals in two directions within the flow field under test, based on the absorption peak position image template, to determine the offset of the absorption peak positions in the two directions; and calculating the airflow velocity using the absorption peak offsets in the two detection directions. This invention improves the accuracy of solving the absorption spectrum frequency shift at different optical depths, thereby improving the velocity measurement accuracy in complex flow fields with varying operating conditions.

A method for lossless depth profiling includes projecting a pulsed pump beam into a sample, projecting a pulsed probe beam into the sample, and sensing light returning from the sample to obtain a measurement signal. Each probe pulse is configured to undergo Brillouin scattering from the primary acoustic pulse caused by a directly preceding pump pulse so as to scatter from the primary acoustic pulse at a respective depth within the sample. The method further includes executing an optimization algorithm configured to receive as an input a measurement signal and / or a processed signal obtained from the measurement signal, and outputting a value characterizing the structural parameter (s) of the sample by minimizing a cost function indicative of a difference between the measurement signal and an analog signal obtained using a forward model that simulates scattering of the pulsed probe beam from at least the primary acoustic pulse.

The invention relates to the technical field of monitoring of the running state of a solar cell panel, and discloses a method and device for detecting the influence result of the solar cell panel, and the method comprises the steps: obtaining the related data of the solar cell panel during running; wherein the related data comprises aerosol optical thickness data, wind speed data and vibration root-mean-square data; determining a joint threshold based on the related data, and detecting whether a difference between the joint threshold and the actual power value is greater than a difference threshold; when the difference value between the combined threshold value and the actual power value is larger than a difference threshold value, the power attenuation rate is determined based on the aerosol optical thickness variable quantity and the vibration root-mean-square variable quantity; and detecting the influence result of the solar cell panel based on the power attenuation rate and the related data.

The application discloses a kind of based on deep learning inversion AOD auxiliary atmospheric correction method, device and medium, it is related to atmospheric remote sensing and deep learning cross technical field, including: the multiple type training sample set of fusion measured and physical simulation data is constructed, after quality screening and stratification processing, obtain the pre-training sample of adaptation satellite remote sensing data, fine-tuning sample and extreme scene sample;Create deep learning network model with data loss and anti-operator constraint loss weighted fusion as total loss function, adopt cross-satellite transfer learning strategy, in turn complete pre-training, satellite special fine-tuning and extreme scene enhancement training, obtain the training completed aerosol optical depth inversion model;Radiometric calibration is executed to satellite remote sensing original data, cloud detection, geometric correction preprocessing, input model inference calculation, to output result is post-processed and quality classification, obtain the aerosol optical depth inversion result used for auxiliary atmospheric correction.

To provide a display system for use in a vehicle.SOLUTION: A display system configured to be integrated into a vehicle is provided, comprising a light source and an optical subsystem optically coupled to the light source. The optical subsystem includes a reflector and at least one semi-reflective optical member, and is configured to generate light and direct light rays to provide a plurality of virtual images that appear to a viewer concurrently at each of a plurality of different optical depths. Each of the virtual images travels a different distance within the optical subsystem before exiting the optical subsystem on a path toward eyes of the viewer.SELECTED DRAWING: Figure 1

This application provides a method, apparatus, electronic device, and medium for aerosol optical thickness data completion, belonging to the field of remote sensing data processing and atmospheric environment monitoring. The method includes: acquiring multi-source data; encoding the multi-source data using a 3D encoding / decoding network to obtain an initial feature map; using auxiliary data as guiding weights for underlying surface geographic features, and combining this with a spatial attention module and the initial feature map to obtain a spatial feature map; obtaining a temporal feature map based on a temporal attention module based on the initial feature map; concatenating the spatial and temporal feature maps, and then adding them element-wise to the initial feature map to obtain a comprehensive feature map; decoding the comprehensive feature map to obtain an initial completion result; converting the initial completion result into corresponding completion values; determining missing regions based on each completion value; and completing the missing regions to obtain the completed aerosol optical thickness data. This application can improve the accuracy of aerosol optical thickness data completion.