18 results about "Luminosity" patented technology

The invention discloses a multi-view camera splicing monitoring system based on a sky target, and relates to the technical field of visual intelligence. The multi-view camera splicing monitoring system based on the sky target comprises the following steps: a multi-view data acquisition module used for acquiring multiple types of data sets and carrying out time alignment and dimensionless normalization; the target detection and luminosity reference construction module is used for carrying out sky target detection and standard color block analysis and constructing a multi-view luminosity reference library; the deviation estimation and mapping construction module is used for constructing a cross-camera global luminosity mapping model; the adaptive control and real-time correction module is used for regional luminosity correction and illumination change detection; and the panoramic stitching and evaluation feedback module is used for constructing a joint area luminosity consistency evaluation index. According to the method, the multi-view splicing brightness color consistency and the target detection robustness under complex illumination are effectively improved, and the problems of seam brightness gradient and difficult color cast elimination caused by independent automatic exposure and white balance are solved.

The invention discloses a space-time multi-parameter cooperative computing method and system based on a universe model, and relates to the technical field of universe and celestial body physics computing. According to the method, an integral kernel function is constructed based on an FLRW degree gauge of a standard universe model, redshift and universe densitology parameters input by a user are received, a Friedemann equation is calculated by using a Gauss-Kronrod adaptive numerical integration algorithm, basic quantities such as co-movement distance and time are solved, and the cosmic movement is realized. And deriving derivative parameters such as co-dynamic volume, angular diameter distance, luminosity distance, universe age, light running time and the like according to universe curvature types (flatness, opening and closing). The system comprises a parameter input module, a core integral calculation engine, a geometric model judgment module, a multi-type distance and derivative parameter calculation module and a result output module. According to the method, the problems of low calculation precision and poor model adaptability in the prior art are solved, a high-precision (error is less than or equal to 10 <-7 >) self-adaptive universe calculation solution with comprehensive parameter coverage is provided, and a powerful calculation tool is provided for universe research and astronomical observation data analysis.

The invention discloses an astronomical experimental device for simulating the photometric change of double food stars, and the device comprises a fixing unit which comprises a supporting part located at the lower part, an angle display part disposed at the top end of the supporting part, and a length display part transversely disposed on the angle display part. The limiting component is arranged on the angle display component, and the angle display component and the length display component are connected in series through the limiting component; the limiting unit comprises a fixing part located on the length display part and an adjusting part arranged below the fixing part. The invention provides a device capable of meeting more use requirements, improving the use efficiency of the device, facilitating the smooth proceeding of experimental work, and providing a device capable of recording the luminosity change and simulating the luminosity change conditions of different stages of a food double-star experiment by controlling the movement and the shielding degree of a star, so that the experimental efficiency of the food double-star experiment is improved. And thus, a scientific research scheme in the aspect of eating double stars in astronomy can be better assisted for working personnel.

This invention discloses a method and system for space target detection and self-calibration photometry in spaceborne star field imaging. The method includes the following steps: acquiring the raw telemetry data stream from the satellite in spaceborne star field imaging mode, and reconstructing a two-dimensional raw image sequence; performing self-calibration radiometric correction, background noise modeling, multi-frame registration, source parameter extraction, and space target discrimination on the raw image sequence to obtain the corresponding stellar background, space targets, and single-frame artifacts; constructing a standard star candidate set and fitting a mapping model from standard star pixel coordinates to celestial coordinates; converting the pixel coordinates of the space target to the corresponding celestial coordinates; performing photometric zero-point fitting and space target photometry operations; and outputting structured space target observation results. This invention relates to the field of space target observation technology. By introducing multi-frame self-calibration radiometric correction, inter-frame geometric registration and multi-frame consistency discrimination, and robust photometric zero-point fitting, reliable observation of spaceborne space targets is achieved.

Method for operating a luminaire (10) by means of gesture control without contact, which is equipped with - a luminaire (10) comprising at least one light source (14) which emits a beam of light (26) along an optical light emission axis (28), - a sensor arrangement (18) for detecting (i) a movement of an object (20) into and / or out of the light beam (26) and / or within the light beam (26) and (ii) a standstill of an object (20) in the light beam (26), wherein the object (20) is in particular a hand, and - an evaluation and control unit (22) which receives signals from the sensor arrangement (18) representing a movement of the object (20) as well as a standstill of the object (20) and evaluates these to detect a movement or standstill of the object (20) and which controls the at least one light source, - wherein the luminaire, when switched on, is switchable into at least one setting mode for setting or changing at least one photometric operating parameter of the luminaire (10), such as the brightness of the light, the color of the light, the color saturation of the light, the degree of spread of the light beam and / or the orientation of the light beam (26) in space, wherein the method - by moving the object (20) into and / or out of the light beam (26) and / or through the light beam (26) switching between an off state and an on state of the luminaire (10), - by the object (20) coming to a standstill within the light beam (26) while the light (10) is switched on, the light (10) is switched from deactivation of at least one setting mode or of one of several setting modes to its activation, - wherein the activation and / or deactivation of the at least one setting mode or one of the several setting modes is visually indicated by the evaluation and control unit (22) controlling the at least one light source (14) to intermittently change at least one photometric operating parameter of the luminaire (10) that can be set or adjusted in the activated setting mode, such as brightness flickering, in particular reversible color change, in particular reversible color saturation change, in particular reversible widening or narrowing of the light beam or reversible swiveling of the light beam (26), and - by moving the object (20) after it has come to a standstill, the lighting operating parameter(s) that can be set and / or changed in the activated setting mode is set or changed.

The invention provides a centimeter-level space debris threat approaching research and judgment method based on space-based optics. The method mainly comprises the following steps: 1, calculating the angular position and luminosity of a space target optical image; 2, determining the relative angle change rate of the space target; 3, calculating a threat angular rate threshold value and primarily judging threats; 4, distance change rate inversion and threat luminosity threshold calculation; and 5, studying and judging threat approaching. According to the method, an angular position and a luminosity value of a space target are extracted from an optical image, a high-precision angular rate is fitted, a threat of space debris is preliminarily judged, relative distance change is inversed in combination with luminosity, and a threat approaching condition is quickly judged. According to the method, relative kinematics and a classical radiation theory are utilized, the obtained angular rate is high in precision, a threat threshold result is reliable, and rapid threat approaching research and judgment of centimeter-level space debris in a space-based optical observation scene can be realized.

The application belongs to the field of target optical detection, and discloses a target optical detection simulation method and system containing a star background, which simulates a scene containing a star background and a target by constructing an optical scene to be detected, establishes a detection model, converts star luminosity and target luminosity optical physical quantities into gray value DN in the field of digital images, and presents data collected by a detector in the form of an image, accurately identifies and removes star information from a complex image containing stars and targets, accurately obtains the position of the target and the miss distance, determines the deviation of the target relative to an ideal observation position, adjusts the observation angle in real time, continuously tracks the target, ensures that the target is always in the center or within the field of view, and obtains comprehensive and accurate detection information, solving the problem that existing target detection process simulation has relatively independent elements, does not have the capability of simultaneously constructing a target and a background and full-link modeling simulation, and lacks physical simulation modeling capability.

The application discloses a relative photometry improvement method for an oversaturated detection image, belongs to the technical field of astronomical image photometry, and aims at solving the problem that the nonlinear truncation of the observed light flux is caused by the oversaturation of the gray value of a star in an existing astronomical image, and the systematic deviation exists in a classical relative photometry model in a star apparent magnitude estimation method. The method comprises the following steps: based on a point spread function model of saturation truncation, a mathematical relationship between the total light flux of a star and the observed light flux of the star in an astronomical oversaturated detection image is established; according to the mathematical relationship, a relative photometry improvement model is established; based on the observed light fluxes of a plurality of known stars and corresponding reference apparent magnitudes, an iterative optimization algorithm is adopted to iteratively optimize the relative photometry improvement model, and the optimal model parameter in the model is solved; and based on the optimal model parameter and the observed light flux of a target to be measured, the apparent magnitude estimation value of the target in the astronomical oversaturated detection image is obtained through the relative photometry improvement model.

The invention relates to different variants of reflectors (220), which alone or together with a light unit (210) also described form a space-saving high-luminosity system.

Disclosed in the present invention is a luminosity compensation method for testing optical performance of a lamp. The method includes: S1: acquiring reference test data Data1 from a standard-compliant lamp; S2: acquiring actual test data Data2 of a lamp under test; S3: fitting and aligning the reference test data Data1 and the actual test data Data2 to acquire a preliminary data position in the reference test data Data1 that best matches the actual test data Data2; S4: performing position compensation on the preliminary data position to acquire a final data position; and S5: determining a final luminosity value of the lamp under test according to the final data position. The present invention can shorten the test time to improve the production line test efficiency and meet production requirements, and can also reduce the impact of heat accumulation on the test result to improve the accuracy of the test result.

To meet a request that one gas analyzer preferably be capable of covering a wide measurement range.SOLUTION: A first reference relationship between the wavelength of light emitted to a reference gas and a reference absorbance of the light by the reference gas is defined in advance. A gas analyzer includes: an acquisition unit that acquires a target relationship between the wavelength of light emitted to a target gas that is of the same type as the reference gas and a target absorbance of the light by the target gas; and a calculation unit that calculates the concentration of the target gas based on the first reference relationship and the target relationship in a wavelength range defined according to the magnitude of the target absorbance acquired by the acquisition unit.SELECTED DRAWING: Figure 4

The application discloses a high-precision space target orbit prediction method based on numerical fitting, and relates to the technical field of space target orbit prediction.The frequency domain decomposition of the application is combined with a harmonic compensation model to completely eliminate seasonal system drift caused by the gravitation of the sun and the moon; high-frequency components are stripped of attitude noise through light pressure parameterization and smooth difference to avoid the transmission of perturbation coupling error; a harmonic order adaptive mechanism captures the main disturbance term with the least amount of calculation; least square batch estimation realizes one-time solution of coefficients; template library preloading technology effectively compresses the time consumption of new target initialization; in addition, the application introduces a geomagnetic modulation factor to dynamically suppress compensation distortion during magnetic storms, and a sliding window mechanism guarantees real-time updating of coefficients, and stable prediction is still maintained under extreme events; photometric curve inversion is adopted instead of attitude measurement to make non-cooperative target prediction possible; tangential component directional compensation ensures the stability of the orbit plane and reduces satellite position fuel consumption.

Even a small change in the distance between the lens and the light source in the direction of light irradiation can alter the illumination range. [Solution] The light-emitting device 1 comprises a light-emitting element 10 that emits light from a light-emitting surface 11, and a lens 20 having an incident surface 21 into which the light emitted from the light-emitting element is incident and an outgoing surface 22 that emits light. The lens is movable a predetermined distance D relative to the light-emitting element in the direction of the center of luminosity of the light-emitting surface. The incident surface has a first region 211 formed on a substantially flat surface facing the center of luminosity, and a second region 212 provided around the first region where a plurality of reflective prisms 213 are formed. The ratio of the maximum width W2 of the first region to the maximum width W1 of the light-emitting surface is a predetermined ratio including equality.

The present application relates to a kind of space target luminosity micro change calculation amplification method, provide support for the space target characteristic parameter based on luminosity change inversion.The present application uses the mode of " first fitting, then extraction", regression analysis noisy luminosity micro change signal, obtain the regression curve of micro change signal;Subtract the regression signal of fitting from noisy luminosity micro change signal, obtain the luminosity micro change signal of mean removal, simply referred to as difference signal, the difference signal includes effective target luminosity micro change signal, also includes noise.Luminosity micro change extraction is converted into extracting effective micro change signal from difference signal;Based on the threshold value judgment rule of different modal component signal signal-to-noise ratio and permutation entropy estimated after decomposition, effective micro change signal is constructed from the decomposition of difference signal, effective micro change signal is added to fitting signal, based on the setting amplification multiple of addition result signal mean deviation value, output is luminosity micro change calculation amplification result.After luminosity micro change signal amplification, the mean of signal does not change, signal-to-noise ratio improves, highlights effective micro change signal feature, provides support for subsequent luminosity curve analysis.

The application discloses a method capable of extracting and calculating a target micro-variable signal in an amplified mixed signal, and comprises the following steps: expanding a two-dimensional sequence mixed signal into a plurality of sub-bands in a Poisson difference scale space; constructing a conjugate scale space of the two-dimensional sequence signal based on a Riesz transform of different spatial scale sub-bands, and jointly forming a mono-evolution scale space with the Poisson difference scale space; constructing a quaternion mono-evolution phase by using the direction and phase of the mono-evolution signal at each scale to replace the local phase, so as to eliminate the local phase sign uncertainty and the winding problem; processing two components of the quaternion phase of different scales through a time band-pass filter to obtain a phase difference of a micro-variable signal of interest, multiplying the two components of the filtered quaternion mono-evolution phase by an amplification factor of the current scale to calculate the phase of the target micro-variable signal extracted by amplification filtering; adaptively adjusting the amplification factor at the corresponding scale according to the wavelength of the scale filter during the calculation amplification process; and reconstructing the micro-variable signal of the calculation amplification by phase shift transformation of the micro-variable signal of the amplification. The application is suitable for micro-motion calculation amplification in optical measurement video, astronomical target luminosity micro-variable signal calculation amplification in astronomical photometry signal and the like, and has the characteristics of high calculation efficiency, low amplification distortion and wide application object.

The invention provides a light generating system (1000) comprising a first light generating device (110), a second light generating device (120), a third light generating device (130), a luminescent material (200), and a control system (300), wherein: (A) the first light generating device (110) comprises a first laser light source and is configured to generate first device light (111) having a first device peak wavelength (λ1) and having a first spectral power distribution; wherein the first device peak wavelength (λ1) is selected from the wavelength range of 445-475 nm; (B) the second light generating device (120) comprises a second laser light source and is configured to generate second device light (121) having a second device peak wavelength (λ2) and having a second spectral power distribution, different from the first spectral power distribution; wherein the second device peak wavelength (λ2) is selected from the range of 420-450 nm or from the range of 470-490 nm; (C) the luminescent material (200) is excitable by the first device light (111) and the second device light (121); wherein the luminescent material (200) is configured to convert at least part of one or more of the first device light (111) and / or the second device light (121) into luminescent material light (201) having a centroid wavelength λc,1 within the green-orange wavelength range; the luminescent material (200) has an absorbance band having a first absorbance E1 at the first device peak wavelength (λ1) and a second absorbance E2 at the second device peak wavelength (λ2), wherein E2 / E1<1; (D) the third light generating device (110) comprises a third laser light source and is configured to generate third device light (111) having a third device peak wavelength (23) selected from the wavelength range of 600-650 nm; (E) |λ1−λ2|≥20 nm; λ1 and λ2 are selected from the wavelength range of 420-490 nm; and |λc,1−λ3|≥20 nm; (F) the control system (300) is configured to control at least the first light generating device (110) and the second light generating device (120): (G) the light generating system (1000) is configured to provide in an operational mode white system light (1001).

The spectroscopic analysis apparatus (1) includes a light source (11) configured to emit light comprising at least a first wavelength and a second wavelength, a spectrometer (12) configured to separate the light emitted from the light source (11) into light of the first wavelength and light of the second wavelength, a detector (14) configured to detect light of the first wavelength and light of the second wavelength that are emitted from the spectrometer (12) and pass through a sample(S), and a controller (16) configured to calculate first absorbance of the sample corresponding to light of the first wavelength and second absorbance of the sample corresponding to light of the second wavelength on the basis of a detection result of the detector (14), wherein the controller (16) calculates post-correction absorbance of the sample(S) corresponding to light of the first wavelength by correcting the first absorbance using the second absorbance.

The embodiment of the present application relates to the technical field of space exploration, in particular to a method for quantitatively processing visible light image data of a space target. The method comprises: acquiring space target image data in a detection direction, the space target image data comprising a plurality of gray values; wherein the space target image data comprises a detection target and a plurality of stars; determining magnitude values of the stars according to the detection direction and a visible light star catalog file; selecting a first calibration star and a second calibration star from the plurality of stars, determining the luminosity of the first calibration star according to the magnitude value of the first calibration star, and determining the luminosity of the second calibration star according to the magnitude value of the second calibration star; determining the sum of the gray values of the first calibration star, the sum of the gray values of the second calibration star, and the sum of the gray values of the detection target; establishing a mapping relationship between the luminosity and the sum of the gray values according to the sum of the gray values of the first calibration star, the luminosity of the first calibration star, the sum of the gray values of the second calibration star, and the luminosity of the second calibration star; and determining the magnitude value of the detection target according to the mapping relationship and the sum of the gray values of the detection target.