68 results about "Spectral sensitivity" patented technology

The invention provides an ICESat-2 turbid water area sounding correction and water depth inversion method based on optical characteristics of a water body. The method comprises the following steps: S1, obtaining photon data and an optical remote sensing image of a near-shore turbid water research area, and carrying out preprocessing operation on the data; s2, performing spectral sensitivity analysis by acquiring an ICESat-2 photon error value and combining optical characteristics of a water body; s3, constructing an ICESat-2 turbid water area sounding compensation model based on water optical characteristics, and selecting the model preferentially according to evaluation indexes; s4, synthesizing a multi-temporal image, and realizing model adaptive adjustment of different space weight distribution based on the spectral sensitivity difference of the turbid water area; s5, constructing an ICESat-2 and remote sensing image joint inversion water depth model based on turbidity partitioning; s6, spatial interpolation is carried out on a water depth inversion result, residual noise and adjacent pixel differences possibly occurring in the image are suppressed, and continuous water depth is obtained; according to the invention, large-range water depth inversion without field actual measurement work can be realized.

An end-to-end color imaging system chromaticity characterization method based on hyperspectral calibration belongs to the field of color imaging, color display and imaging chromaticity measurement, and comprises the following steps: firstly, acquiring or calling hyperspectral cube data, and measuring red, green and blue three-channel spectral sensitivity curves and calibration coefficients of imaging equipment; fixed weight linear mapping is adopted, a pixel-level RGB image and a corresponding XYZ tristimulus value image are generated, and paired calibration samples are formed. And an end-to-end deep network is constructed to map any RGB image into an XYZ image. The method has good prediction precision and robustness, and can be widely applied to scene chromaticity measurement, color imaging color management, display calibration, camera color recovery and other chromaticity consistency demand scenes.

The invention provides a corn leaf nitrogen content evaluation method and system based on hyperspectral remote sensing, and relates to the technical field of crop remote sensing analys.The method comprises the steps that hyperspectral data with the spectral range of 400-1000 nm is collected, atmospheric correction is conducted, sub-wavebands are divided out, and environment correction coefficients of different sub-wavebands are generated; the method comprises the following steps: constructing a function relation between spectral reflectivity and nitrogen content under each sub-band based on a least square method, determining the spectral sensitivity of each sub-band, selecting five bands with the highest sensitivity as sensitive bands, correcting the weight coefficient of each sensitive band through an environment correction coefficient, generating an improved weighted spectral index, and finally, determining the spectral sensitivity of each sub-band. And training a nitrogen content prediction model by using a deep learning network and taking the improved weighted spectral index as input, and generating a nitrogen content prediction value of the corn leaves through hyperspectral data and related environment information.

The invention relates to sensor system arrangements and configurations. In particular, the invention provides methods, devices, systems and computer program products for integrating, compositing and / or processing data representing a measurable state within a region-of-interest, that has been received from a plurality of sensors that respectively have different input sensitivities, spectral sensitivity ranges and / or input capture ranges.

The invention relates to the technical field of data processing, in particular to a pesticide residue detection method and system based on big data. The method comprises the following steps: acquiring a surface spectrum curve of a target crop and pesticide related parameters; determining a dynamic adjustment coefficient of the surface spectrum curve; for a target wave band in each wave band in the surface spectrum curve, determining a time decay factor of the target wave band; determining the spectral sensitivity of the target wave band; determining the weight of the target wave band; dimensionality reduction is carried out on the surface spectrum curve, and a pesticide residue detection model is established, so that pesticide residue detection based on big data is realized. According to the method, the characteristics of each wave band are extracted and the weight is calculated, so that key information most related to the pesticide residues can be kept in the dimension reduction process, then the wave bands are screened according to the weight, noise information irrelevant to or relatively low in correlation with the pesticide residues is removed, the risk of misinformation and missing report is reduced, and the accuracy of the pesticide residues is improved. The accuracy of pesticide residue detection is improved.

The present invention is provided with: a plurality of color sensing units (51)-(54) that comprise a plurality of color filters (511)-(541) and a plurality of light-receiving sensors (512)-(542) for receiving light which has passed through the color filters (511)-(541); a plurality of signal processing circuits (61)-(64) that respectively correspond to the plurality of color sensing units (51)-(54) and have a function for integrating signals input thereto from the color sensing units (51)-(54); and a computation unit (7) that computes outputs from the signal processing circuits (61)-(64). Among the plurality of color sensing units (51)-(54), color sensing units that have spectral sensitivities corresponding to the X component, the Y component, and the Z component of a color-matching function are included, and there are a plurality of second color sensing units (52), (53) that have a spectral sensitivity corresponding to the Y component. Signals from the second color sensing units (52), (53) are processed by the corresponding signal processing circuits (62), (63) and added by the computation unit (7).

Optoelectronic measuring device (1) for frequency-resolved measurement of the intensity of electromagnetic radiation (10), comprising multiple measurement channels (M1, M2, ..., M m ), wherein a first of the measurement channels (M1) has a first spectral sensitivity and another of the measurement channels (M2, ..., M m ) exhibits another spectral sensitivity that differs from the first spectral sensitivity, and several collimators (K1, K2, ..., K k ) to collimate the electromagnetic radiation (10), wherein - through each of the collimators (K1, K2, ..., K k ) a separate optical path to one or more of the measurement channels (M1, M2, ..., M m ) runs and each of the measurement channels (M1, M2, ..., M m ) is arranged, an intensity of the collimators (K1, K2, ..., K) is arranged, an intensity of the collimators (K1, K2, ..., K k ) collimated electromagnetic radiation (10) to measure, - the optoelectronic measuring device (1) more collimators (K1, K2, ..., K k ) as measuring channels (M1, M2, ..., M m ) includes, and - the optoelectronic measuring device (1) comprises a radiation distribution means (3) which is set up and arranged to direct the electromagnetic radiation (10) onto the collimators (K1, K2, ..., K k ) to distribute, wherein the radiation distribution means (3) comprises a scattering element and / or an optical fiber.

To provide a sensitivity measuring device and a sensitivity measuring method capable of measuring spectral sensitivity distribution of a light receiving element to be measured in a short time.SOLUTION: The sensitivity measurement device includes a light source, an optical system, a light collection mechanism, a position adjustment mechanism, a measurement unit, and an analysis unit. The optical system is configured to generate an interference wave by splitting light from a light source into two beams and causing the two beams to interfere with each other, and includes an optical path length difference changing mechanism configured to change an optical path length difference. The condensing mechanism condenses the interference wave at an irradiation position on the light receiving surface of the measured light receiving element. The position adjustment mechanism changes an irradiation position of the interference wave in a direction along the light receiving surface. The measurement unit controls the irradiation position and acquires a signal obtained by converting the interference wave from the light receiving element to be measured. The analysis unit calculates a component of the signal of each wavelength by Fourier transform of an interferogram obtained from the optical path length difference changed by the optical path length difference changing mechanism and the intensity of the signal measured by the measurement unit.SELECTED DRAWING: Figure 1

The invention provides a literature report generation evaluation method and system based on a large model, and the method comprises the steps: obtaining a literature image data set containing non-text elements, and the non-text elements comprise chart elements and formula symbols; the method comprises the following steps: separating different spectral band data of a literature image data set to generate multi-channel spectral data containing color distribution characteristics and material reflection characteristics, and dividing a high-sensitivity band and a low-sensitivity band of the multi-channel spectral data according to a spectral sensitivity threshold, calculating spectral characteristic difference quantity between the two wave bands and executing bit width distribution to generate spatial continuity coded data and frequency domain distribution coded data; analyzing the two types of coded data through a large model to generate a structured text description, and verifying the information coverage degree of the description relative to the literature image data set to generate an evaluation result; according to the method, the recognition precision and the structural description capability of the non-text elements in the document image are improved, and the requirements of automatic analysis and evaluation of high-quality multimedia documents are met.

The invention is a method for manufacturing filters for an optical filter system, for manufacturing an optical filter system, and for manufacturing an optical measurement device. The system comprises a plurality of filters, and a frame holding the plurality of filters in a predefined pattern. The method comprises, per filter, the steps of:applying a plurality of coatings on a substrate to obtain a coated substrate provided with a stack of filter coatings designed for the specific spectral sensitivity of the filter,dividing the coated substrate into a plurality of portions,determining the good ones of the portions, which meet a predefined design requirement,dicing the coated substrate into the plurality of portions, andpicking a good one of the portions as the filter.

The invention is a method for manufacturing filters for an optical filter system, for manufacturing an optical filter system, and for manufacturing an optical measurement device. The system comprises a plurality of filters, and a frame holding the plurality of filters in a predefined pattern. The method comprises, per filter, the steps of:applying a plurality of coatings on a substrate to obtain a coated substrate provided with a stack of filter coatings designed for the specific spectral sensitivity of the filter,dividing the coated substrate into a plurality of portions,determining the good ones of the portions, which meet a predefined design requirement,dicing the coated substrate into the plurality of portions, andpicking a good one of the portions as the filter.

The application provides a detection method for the effect of longitudinal chromatic aberration defocus signals on eye refraction development, which comprises the following steps: obtaining a spectral sensitivity function of human eye cone cells; obtaining a first target defocus signal based on the spectral sensitivity function; performing an influence experiment of a display image longitudinal chromatic aberration defocus signal on human eyes based on the spectral sensitivity function, and obtaining a second target defocus signal; performing an animal level in-vivo detection experiment based on the spectral sensitivity function, and obtaining a third target defocus signal; and performing a molecular level analysis experiment of the effect of the image longitudinal chromatic aberration defocus signal on eye refraction development based on the in-vivo detection experiment. The method provided in the embodiments of the application can analyze the effect of DI-LCA defocus signals on refraction development through cone cells from three levels of tissues, animals and molecules, and preferably target defocus signals, thereby providing support for the research and development of display driving programs and devices for reducing the risk of myopia.

The photoelectric conversion element of one embodiment of the present application comprises: a first electrode; a second electrode; a photoelectric conversion layer, which is arranged between the first electrode and the second electrode and contains a donor organic semiconductor material and an acceptor organic semiconductor material; and a hole blocking layer, which is arranged between the first electrode and the second electrode and the photoelectric conversion layer. The ionization potential of the photoelectric conversion layer is 5.3 eV or less. The electron affinity of the hole blocking layer is less than the electron affinity of the acceptor organic semiconductor material contained in the photoelectric conversion layer. It has spectral sensitivity in the near-infrared light region with a wavelength of 650nm to 3000nm.

Provided are a light emitting device capable of reducing glare, a headlight, and a vehicle including the same.The light emitting device comprises: a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less; and a wavelength conversion member including a first fluorescent material having a light emission peak wavelength in a range of 480 nm or more and less than 580 nm and a second fluorescent material having a light emission peak wavelength in a range of 580 nm or more and 680 nm or less and having a composition different from that of the first fluorescent material, wherein the light emitting device emits light having a first luminance ratio Ls / L that is 0.9 or less, where Ls / L is a ratio of a first effective radiance Ls of the light emitted by the light emitting device in consideration of a spectral luminous efficiency curve for photopic vision of humans specified by the CIE (Commission Internationale de l'Eclairage) and S-cone spectral sensitivity of humans, to a luminance L of the light emitted by the light emitting device in consideration of the spectral luminous efficiency curve for photopic vision of humans.

To provide a technique for reducing a work load for performing color matching between cameras for a color whose spectral reflectance is not acquired in advance.SOLUTION: An information processing device includes an acquisition unit configured to acquire a first image captured by a first imaging device under first illumination, and a first calculation unit configured to calculate spectral reflectances of first one or more colors corresponding to one or more pixels in the first image based on a pixel value of each of the one or more pixels in the first image, spectral reflectances of three primary colors measured in advance under second illumination, spectral sensitivity of the first imaging device, and a spectral distribution of the first illumination.SELECTED DRAWING: Figure 2

The present invention relates to the technical field of data processing, and particularly to a method and system for detecting pesticide residues based on big data. The method includes: obtaining the surface spectral curve of a target crop and pesticide-related parameters; determining the dynamic adjustment coefficient of the surface spectral curve; for a target band in each band within the surface spectral curve, determining the time decay factor of the target band; determining the spectral sensitivity of the target band; determining the weight of the target band; reducing the dimension of the surface spectral curve, and establishing a pesticide residue detection model to achieve pesticide residue detection based on big data. By extracting the features of each band and calculating the weights, the present invention can ensure that the key information most relevant to pesticide residues is retained during the dimension reduction process, and then the bands are screened according to the weights to remove the noise information irrelevant or less relevant to pesticide residues, which helps to reduce the risks of false alarms and missed detections and improve the accuracy of pesticide residue detection.

A novel optical functional device that is highly convenient, useful, or reliable is provided. The optical functional device includes a light-emitting function, a photoelectric conversion function, a first electrode, a second electrode, and an optical functional layer. The light-emitting function converts electrical energy into first light, the first light has a first emission spectrum, and the first emission spectrum exhibits a maximum peak at a first wavelength. At a second wavelength, the intensity of the first emission spectrum is 80% of the maximum peak. The photoelectric conversion function has a spectral sensitivity characteristic; at a third wavelength, the spectral sensitivity characteristic has a maximum sensitivity within a range of 420 to 720 nm inclusive; and at a fourth wavelength, the sensitivity of the spectral sensitivity characteristic is 80% of the maximum sensitivity. The third wavelength is positioned closer to the second wavelength than to the first wavelength, and the fourth wavelength is positioned closer to the first wavelength than to the third wavelength.

The invention relates to a color correction method, a spectrum sensing device and an imaging device. The color correction method comprises the following steps: acquiring spectral data of current ambient light; based on the spectral data of the current ambient light and a spectral sensitivity function of the imaging equipment, calculating an original multi-channel response value of the imaging equipment for a specific reflectivity sample; acquiring a stimulus value of the specific reflectivity sample in a target color space; calculating a conversion mapping from the original multi-channel response value to a stimulus value in the target color space; and applying the conversion mapping to an image currently shot by the imaging device to convert the image to the target color space, and performing color correction on the image in the target color space. Therefore, the original multi-channel response value of the imaging equipment can be converted into the target color space based on the spectral data of the current ambient light, so that the color correction precision of the imaging equipment is improved.

Method for scanning an object (3) using an imaging technique, wherein the method comprises the steps: - Simultaneous illumination of an object (3) with at least two different light sources (17, 26, 30), wherein the light sources (17, 26, 30) have different light spectra (33, 34, 35), - Scanning the object (3) using at least two sensors which have different spectral sensitivities (36, 37, 38), and - Separating the intensities of the light spectra (33, 34, 35) of the at least two light sources (17, 26, 30) in the sensor signals detected by the sensors using specific sensitivities of the respective sensors for the different light spectra.

The invention provides a light-emitting device capable of reducing glare and improving durability, a headlamp and a vehicle provided with the same. The light-emitting device is provided with: a light-emitting element having an emission peak wavelength within the range of 400-490 nm; and a wavelength conversion member. The wavelength conversion member includes a first phosphor having an emission peak wavelength in a range of 480 nm or more and less than 580 nm, and a second phosphor having an emission peak wavelength in a range of 580 nm or more and 680 nm or less and having a composition different from that of the first phosphor, and the light emitting device emits light having a first luminance ratio Ls / L of 0.9 or less. The first luminance ratio Ls / L is a ratio of a first effective radiance Ls of light emitted by the light-emitting device taking into account a photopic vision standard relative visibility curve of a person specified by CIE and spectral sensitivity of an S-cone of the person, to a luminance L of light emitted by the light-emitting device taking into account the photopic vision standard relative visibility curve of the person. The first phosphor contains a rare earth aluminate phosphor having a composition represented by formula (1A).

To provide a new optical functional device excellent in convenience, availability or reliability.SOLUTION: The optical functional device comprises a light emission function, a photoelectric conversion function, a first electrode, a second electrode, and an optical function layer. The light emission function converts electrical energy into first light which has a first emission spectrum. The first emission spectrum exhibits maximum peak at a first wavelength, and has 80% intensity of maximum peak at a second wavelength. The photoelectric conversion function has a spectral sensitivity characteristic which exhibits maximum sensitivity in the range of 420 nm or more and 720 nm or less at a third wavelength. The spectral sensitivity characteristic includes sensitivity of 80% of maximum sensitivity at a fourth wavelength. The third wavelength is positioned closer to the second wavelength than the first wavelength while the fourth wavelength is positioned closer to the first wavelength than the third wavelength.SELECTED DRAWING: Figure 1

Device (100) for determining the image quality of at least one image for a test specimen (105), wherein the device (100) has the following features: - at least one projection unit (115) for emitting light (120) in the direction of the test object (105) in order to project at least one luminous and / or illuminated object structure (300) onto the test object (105); - optical receiving unit (110) for receiving light rays (130) of the light (120) transmitted through or by the test object (105) or reflected, which represent at least one image of the projected object structure (300), wherein the receiving unit (110) comprises an optical device (135) and an optical detector (140) and wherein the receiving unit (110) is adjustable or variable in its spectral sensitivity; - a mounting unit (145) for holding the test specimen (105), wherein the mounting unit (145) is arranged between the projection unit (115) and the optical receiving unit (110); and - a computing unit (150) for simultaneously evaluating a first light parameter (825), representing at least one optical light parameter, and a second light parameter (830), representing at least one colorimetric and / or photometric light parameter, of light rays (130) of the light (120) transmitted through or on the test object (105) and received using the receiving unit (110), in order to determine the image quality of the at least one image for the test object (105), wherein the computing unit (150) is connected to the projection unit (115), the receiving unit (110) and / or the mounting unit (145).

In some embodiments, a sensing device, and in particular, a modular spectral imaging device is described. The sensing device compiles one or more spectral images of an object in a point-by-point scan. The sensing device and related methods for scanning stationary objects provides spectral and spatial discrimination. Unlike conventional line scan or snapshot style devices, this system includes a sensor configured to function as a single pixel photodetector to sample a single point of a sample object. Spectral discrimination refers to isolating specific wavelengths of light within a spectral sensitivity range of a detector. Spatial discrimination refers to imaging an object within multidimensional space. The sensing device allows for configurability of both spectral bands and spatial resolution across a wide range of spectral sensitivities. Temporal scanning techniques are used to build up a multi-dimensional image. Modularity and automation are used to provide a broad range of capabilities.

Optoelectronic device (1), comprising - an optoelectronic component (21) intended to receive or generate radiation, - a frame (4) having a cavity (51) in which the optoelectronic component is arranged, - a connection carrier (3) to which the optoelectronic component is attached, and - a cover (45) which covers the cavity and which forms a radiation passage surface (10) for the radiation, wherein - a beam path from the optoelectronic component to the radiation passage surface is free of a encapsulation material for the optoelectronic component, - the connection carrier is designed as a printed circuit board, and a through-hole through the connection carrier is designed as an opening (33) for air exchange between the cavity and the environment, - the device is designed as an ambient light sensor and the cover (45) determines a short-wave flank of a sensitivity distribution of the ambient light sensor, and - the device has a further filter (27) which determines the long-wave flank of the spectral sensitivity distribution of the ambient light sensor, so that the spectral sensitivity distribution of the ambient light sensor simulates the sensitivity distribution of the human eye.

An optical CRA detector unit (14) with an optical CRA sensor (26) arranged on a substrate (22), wherein the optical CRA sensor (26) comprises a number of CRA detector pixels (30) with the same spectral sensitivity, each generating a radiation intensity signal, wherein the radiation intensity signals generated by the CRA detector pixels (30) are provided to generate a parameter characteristic of the principal beam angle (CRA) of the radiation intensity of the CRA detector unit (14), enabling a particularly compact and miniaturized arrangement.According to the invention, this is achieved by providing an aperture element (32) which is arranged above the optical CRA sensor (26) with respect to the substrate (22), wherein the aperture element (32) comprises a flat, laterally extending refractive element (34) which defines a top (36) and a bottom (38), wherein the top and the bottom (36, 38) are provided with an upper aperture layer (40) and a lower aperture layer (42), respectively, and wherein the upper aperture layer (40) is provided with an upper aperture (44) and the lower aperture layer (46) with a lower aperture (46) which has a lateral size of at least the lateral size of the upper aperture (44).

Optoelectronic sensor component (100) for light measurement with: - a first signal channel (112) to provide a first electrical signal which represents the intensity of light (L) incident on the sensor element (100); - a second signal channel (114) that is technically separate from the first signal channel (112) to provide a second electrical signal that is independent of the first electrical signal and also represents the intensity of the light (L) incident on the sensor element (100); - a first light-sensitive detection arrangement (102) which is set up to generate the first electrical signal and is assigned to the first signal channel (112); - a second light-sensitive detection arrangement (104) which is set up to generate the second electrical signal and is assigned to the second signal channel (114), wherein the first detection arrangement (102) and the second detection arrangement (104) have identical spectral sensitivity and are therefore redundant to each other, wherein the spectral sensitivity of the first detection arrangement (102) and the second detection arrangement (104) has a photopic profile; and - a further light-sensitive detection arrangement (106) and a further signal channel (116) assigned to the further light-sensitive detection arrangement (106), wherein the further detection arrangement (106) is set up to detect only infrared light.

The application discloses a kind of high sediment concentration remote sensing inversion method and device of suspended load based on Sentinel-2 image, first, the satellite multispectral data and measured sediment concentration data of target water area are collected, and are preprocessed;Then the initial spectral feature set including the band feature combination of visible light-short wave infrared range is constructed, then the cross-validation recursive feature elimination algorithm (RFECV) is used to carry out preliminary screening from initial feature library, then according to spectral sensitivity analysis, the optimal feature subset is obtained by fine screening;Again, using random forest (RF) model is based on optimal spectral feature and sediment concentration data set training, constructs suspended load sediment concentration inversion model;Finally, the model is applied to realize the remote sensing inversion of high sediment concentration of suspended load, generates the sediment concentration time series of target water area.The present application effectively overcomes the common spectral saturation problem under high sediment concentration condition, can realize high-precision inversion in 0-45 kg / m³ concentration range, significantly improves the robustness and accuracy of suspended load high sediment concentration remote sensing inversion.

An optical CRA detector unit (14) includes an optical CRA sensor (26) disposed on a substrate (22), where the optical CRA sensor (26) includes a plurality of CRA detector pixels (30) having the same spectral sensitivity, each CRA detector pixel generating an irradiance sensor signal, where the irradiance sensor signal is transmitted to the substrate (22). The irradiance sensor signals generated by the CRA detector pixels (30) are provided with parametric characteristics of the chief ray angle (CRA) for generating the irradiance of the CRA detector unit (14), should allow a specific compact and miniaturized package. According to the invention, this is achieved by providing an aperture element (32) disposed above the optical CRA sensor (26) with respect to the substrate (22), the aperture element (32) comprising a flat, laterally extending refractor element (34) defining a top surface (36) and a bottom surface (38) wherein the top and bottom surfaces (36, 38) are provided with a top aperture layer (40) and a bottom aperture layer (42), respectively, and wherein the top aperture layer (40) is provided with a top aperture (44) and the bottom aperture layer (46) is provided with a bottom aperture (46), the lateral dimension of which is at least the lateral dimension of the top aperture (44).

The present invention discloses a spectrum sensitivity enhancement method based on the correlation characteristics of nuclear magnetic resonance signals, comprising preprocessing multiple original NMR spectra to obtain an initial two-dimensional matrix; matching the initial two-dimensional matrix with correlation data blocks and obtaining a basic estimated spectrum using three-dimensional transformation, frequency domain hard threshold filtering, and first fusion weighting; matching the correlation data blocks with the basic estimated spectrum and guiding the initial two-dimensional matrix to re-match the correlation data blocks; obtaining a spatial three-dimensional correlation data group after Wiener collaborative filtering through three-dimensional transformation and Wiener collaborative filtering; and performing a second fusion weighting based on the spatial three-dimensional correlation data group after Wiener collaborative filtering to obtain a final NMR spectrum with enhanced sensitivity. The present invention can reduce pseudo-signal oscillations around the edges and avoid the classical ringing effect, while also effectively extracting and retaining the characteristic line shape of the nuclear magnetic resonance spectrum, thereby significantly improving the sensitivity of the NMR spectrum.

The photographing device (15) of the present application is provided with a camera (30), light sources (21-23), a band-pass filter (31), and a conversion unit (60). The camera (30) is provided with an image sensor (33) having a color filter of N bands (N is a natural number of 3 or more). The light sources (21-23) of M types (M is a natural number of 2≦M≦N) have emission spectrum characteristics each having a peak in a different wavelength region from each other within a visible light region and a near-infrared region. The conversion unit (60) performs matrix operation on a photographing signal (S1) of N bands obtained by the image sensor (33) when the camera (30) photographs an article (12), thereby generating image signals of M bands each having a spectral sensitivity in a different wavelength region from each other. The light directions and the emission intensities of the light sources (21-23) are selected respectively.