73 results about "Interferometric imaging" patented technology

This invention relates to the field of optical imaging and detection technology, specifically providing a broadband snapshot-type polarization interferometry imaging detection system and method for breast tumors. A broadband light source illuminates a breast tumor tissue sample. The reflected signal light is collected and collimated by a pre-optical system, then sequentially passes through a first and a second ray shaping unit for two shearing and two polarization state transformations, resulting in two beams of linearly polarized light and two beams of circularly polarized light. These beams are imaged by an imaging lens to an area array detector to obtain a polarization interferogram, which is then demodulated to obtain all Stokes parameters of the breast tumor tissue sample. This invention achieves broadband snapshot imaging of breast tumors with all Stokes parameters without using an analyzer, doubling the light throughput compared to traditional polarization imaging instruments using analyzers. Furthermore, this invention has advantages such as compact structure, no moving parts, easy assembly and adjustment, and no need for image registration.

The invention relates to the technical field of film defect detection, and discloses a film defect detection system based on differential interference imaging technology, comprising: a frame provided with a transmission module for transmitting a film to be detected; the visual detection module is arranged in the rack and is used for carrying out defect detection on the thin film in the conveying process; the visual detection module comprises a differential interference visual detection unit, a lighting unit and an adjusting unit. According to the thin film defect detection system based on the differential interference imaging technology, the angles of the differential interference visual detection unit and the illumination unit can be synchronously adjusted, illumination treatment can be performed on a thin film in real time, and bending treatment can be performed on the thin film to be detected; further, defects on the surface of the thin film are deformed or displaced under the action of bending stress, and the defect exposure effect is enhanced; and real-time detection of the film in different bending states is carried out in cooperation with the differential interference visual detection unit.

The application relates to an online monitoring device and method for microelectrodes, and belongs to the technical field of special machining.The online monitoring device is composed of a coaxial holographic imaging module, an LED backlight imaging module, a motion control module, an image acquisition card, a laser power controller and an LED brightness controller.The LED backlight imaging module is used for positioning the microelectrode image; the coaxial holographic imaging module is used for holographic interference imaging of the microelectrode; based on a holographic reconstruction algorithm, electrode profile information is obtained, and the electrode loss degree is judged.The coaxial holographic imaging module and the LED backlight imaging module switch the positions of the reflecting mirrors through the motion control module to realize control of different imaging modes; the collected images are input into a PC through the image acquisition card, image algorithm analysis is carried out, and the microelectrode loss degree is judged.The application realizes online monitoring of the microelectrode loss.

The invention relates to an interference imaging device for phase feedback compensation quasi-real-time calibration, and belongs to the technical field of interference imaging. The calibration device comprises an X / Y direction light path, a controller and a linear displacement table. The X-direction light path structure and the Y-direction light path structure are the same, and each of the X-direction light path structure and the Y-direction light path structure comprises two parallel coupling lenses, an interference assembly and a photoelectric detection assembly which are sequentially arranged in the light incidence direction; the linear displacement table is cross-shaped; four paths of coupling lenses of the X-direction light path and the Y-direction light path are fixed through a linear displacement table and are uniformly arranged around the central point of the cross-shaped linear displacement table; the interference assembly receives the light beams output by the two parallel coupling lenses, performs phase modulation on the light beams, enables the two light beams to perform interference, and outputs an interference light signal to the photoelectric detection assembly; the photoelectric detection assembly converts the interference optical signal into an interference electric signal; the controller is used for sending a control signal to the interference assembly to control phase modulation of the interference assembly and receiving an interference electric signal output by the photoelectric detection assembly.

A composite material gas cylinder layering defect displacement prediction method based on deep learning and laser shearing speckle interference comprises the following steps: constructing a training data set combining simulation data and experimental data, generating the simulation data based on a shearing speckle interference imaging principle, and combining the experimental data acquired by an experiment to predict the layering defect displacement of a composite material gas cylinder. Constructing a mixed data set containing a wrapped phase diagram and an out-of-plane displacement diagram; constructing a deep convolutional neural network fused with an attention mechanism, and extracting displacement features from high-frequency stripes: starting from an input layer, sequentially connecting an encoder path, a bottleneck layer, a decoder path and an output layer; constructing a composite loss function and training the network, and constructing a composite loss function comprising a pixel-level error constraint and a gradient consistency constraint; and utilizing the trained deep learning neural network to predict out-of-plane displacement response at the layering defect of the gas cylinder. According to the method, the problems of image distortion, data missing and the like caused by a traditional phase unwrapping algorithm are effectively solved, and the out-of-plane displacement field can be accurately, smoothly and continuously reconstructed.

The invention discloses a digital differential interference imaging method, and belongs to the technical field of optical imaging and microscopic imaging. The method comprises the steps that bright field illumination is used, a first image and a second image are collected at defocus positions which are vertically symmetrical on a sample focal plane respectively, and the defocus distance is larger than the physical depth of field of an objective lens; and carrying out pixel-level gray value subtraction on the two images to obtain a digital differential phase image. Digital image processing is adopted to replace optical shearing and interference of a traditional DIC, a polarized optical element and a special DIC prism are not needed, the system cost and complexity are remarkably reduced, the system can be compatible with non-standard optical material sample containers such as a plastic culture dish, and the directional shadow problem of the traditional DIC is solved. Meanwhile, by providing two specific implementation modes, namely accurate positioning acquisition and automatic focusing fusion acquisition, the imaging efficiency and the system robustness are further improved on the basis of ensuring the high contrast and the pseudo three-dimensional relief imaging effect.

The application discloses a spaceborne near-space horizontal two-dimensional wind field interferometer based on a ring-shaped field of view and a full-link simulation method, the imaging instrument comprises an optical system, a detector and a data processing unit, the optical system comprises, in sequence along an optical path, a front cone mirror, a field of view diaphragm, a collimating lens group, a Fabry-Perot interferometer, a narrow-band filter assembly and an imaging lens; and the application improves the time-space resolution of instrument detection.

This invention discloses a deep-ultraviolet nanosecond-gated Raman and LIBS detection system and method for suspended soil particulate matter nutrients, belonging to the field of optical and smart agriculture sensor technology. The system includes: a laser ejection sampling unit for in-situ soil ablation to generate aerosols; an optical tweezers unit for capturing and suspending individual soil particles; a deep-ultraviolet laser excitation unit for emitting nanosecond dual-pulse lasers to excite the same particle to generate Raman and LIBS signals; a spatial heterodyne spectral interferometry imaging unit for slitless, high-throughput coaxial signal collection and the formation of interference fringes; and a timing control unit for time-division multiplexing detection of Raman and LIBS signals through nanosecond gating. This invention eliminates matrix effects and achieves highly sensitive in-situ, non-destructive, and synergistic detection of atomic and molecular information in single soil particles. Furthermore, Raman and LIBS are used to distinguish the organic content and total composition of nitrogen, phosphorus, and potassium, enabling precise quantification of soil nutrients.

This invention relates to the field of safety monitoring and disaster early warning technology for deep underground engineering, and discloses an intelligent rockburst dynamic risk prediction method integrating real-time microseismic data. This method first constructs a high-precision medium model reflecting the real-time stress and attenuation characteristics of the rock mass based on background noise interferometric imaging and the adjoint state method inversion. Then, it reconstructs a four-dimensional energy density field, defines and calculates the waveguide locking index to accurately screen key energy localization regions. Subsequently, it extracts the energy residual sequence of the key regions, calculates the lag first-order autocorrelation coefficient and time-domain variance, and uses the critical slowing theory to determine the precursors of system dynamic instability and trigger graded early warnings. This invention corrects imaging biases caused by energy dissipation through physics-driven medium parameter inversion, and combined with data-driven nonlinear dynamic analysis, achieves accurate spatiotemporal positioning of the rockburst incubation core area and early identification of disaster risks.

This invention relates to the field of remote sensing satellite orbit control technology, and discloses a satellite autonomous pipeline control method based on differential interferometric SAR imaging missions. The method includes: acquiring initial satellite orbit parameters; employing a multi-objective optimization algorithm for orbit optimization under a high-order gravity field; sampling and constructing a reference orbit point set; calculating orbit control deviations based on the actual orbit and the reference orbit; generating orbit control triggering rules and avoidance strategies through ground system simulation; executing orbit control strategy generation and control onboard system; and evaluating orbit control effectiveness and the evolution trend of orbit control deviations through the ground system. Existing technologies mainly rely on ground command injection, making it difficult for satellites to achieve efficient autonomous orbit control when performing heavy-orbit differential interferometric SAR imaging missions, and hindering the decoupling of orbit control and imaging tasks. This invention improves the efficiency and autonomy of orbit control, the execution efficiency of imaging missions, and the safety of on-orbit operation by constructing a closed-loop control system encompassing satellite-ground collaboration, strategy formulation, command execution, and effect evaluation.

The invention discloses a sea surface height inspection equipment layout method based on an interference imaging altimeter, which belongs to the technical field of altimeter inspection, is used for sea surface height inspection equipment layout, and comprises the following steps: obtaining position data of a Glider buoy and temperature-salinity-depth data of a profile observed by the Glider buoy, putting the Glider buoy and a GNSS buoy in the same area at the same time before a satellite passes, and putting the GNSS buoy in the same area at the same time; the synchronous observation of the GNSS and the Glider buoy is realized; and carrying out position positioning when the Glider buoy descends and ascends to outcrop, carrying out matching with a grid position in a swath range observed by a satellite, and carrying out sea surface height inversion according to temperature-salinity-depth data of a section obtained through observation of the Glider buoy. The method adapts to data characteristics of different resolutions of the interference imaging altimeter, sea surface height synchronous observation of satellite data with different spatial resolutions under satellite transit is realized, and calibration inspection of the altimeter satellite is accurately completed.

The invention belongs to the field of airborne interference imaging altimeter error correction, and particularly relates to a platform and baseline error correction method based on an airborne interference imaging altimeter, which comprises the following steps of: acquiring a height measurement data sequence X1 continuously acquired along a flight path; preprocessing the X1 to obtain a preprocessed data matrix X2; performing empirical orthogonal function decomposition on the X2 along the rail direction, and extracting a spatial mode, a time coefficient and a characteristic value; determining a main characteristic mode according to a variance contribution rate corresponding to the characteristic value; identifying and separating a platform error component, a baseline error component and a real height signal component by combining distribution characteristics of a space mode and a time coefficient; and reconstructing a real height signal based on a separation result to realize comprehensive correction of a platform error and a baseline error. According to the method, the platform error and the baseline error which are different from real signals in space-time characteristics are effectively separated through EOF decomposition, and the height measurement precision of the airborne interference imaging altimeter is remarkably improved.

The application discloses a phase-adjustable nulling interference system and relates to the field of photoelectric measurement, which comprises a first telescope and a second telescope, a first collimating lens, a second collimating lens, a phase adjusting device, multiple plane mirrors, a beam splitter, a convex lens, a detector and a control device. Incident light passes through the first and second telescopes and is converted into parallel light beams by the first and second collimating lenses. One of the light beams is subjected to phase adjustment by the phase adjusting device, and then the two light beams continue to transmit through the multiple plane mirrors. At the beam splitter, the two light beams are coherently superposed to generate an interference pattern. The pattern is focused on the plane of the detector by the convex lens to form an interference image available for analysis. The detector receives the image and transmits it to the control device, the control device processes and analyzes the image and controls the phase adjusting device to adjust the phase difference between the two light beams, so that the movement of the interference fringes is realized.

The invention discloses a test method for rapidly measuring PCB (Printed Circuit Board) back drilling, which comprises the following steps of: S1, manufacturing mask plates containing drilling information and mark points of a PCB based on a PCBGerber file, and accurately attaching the mask plates to the upper surface and the lower surface of the PCB; s2, building a large-view optical interference measurement system, imaging the PCB attached with the mask plate through a parallel light lens in the large-view optical interference measurement system, scanning the PCB and recording all drilling position information; and S3, performing interference with the reference plane, and calculating the back drilling depth by using an optical path difference formula sigma = 2 * lambda * delta n according to the recorded drilling position information and the phase of interference imaging. According to the method, the measurement efficiency is remarkably improved, and the problem that a traditional measurement mode cannot meet online full inspection is solved. Through a large-view optical interference scheme, measurement of tens of thousands of holes can be completed within seconds, and compared with traditional modes such as single-point manual measurement and fixed point laser measurement, the efficiency is obviously improved, and the rhythm requirement of online production is completely met.

The invention discloses a satellite-borne FPI wind measurement interferometer device with temperature control, which comprises an external telescope system and an FPI interference imaging system, and is characterized in that the external telescope system receives radiation light and introduces the radiation light into the interference imaging system; the interference imaging system sequentially comprises a collimation system, an optical filter system, an etalon system and an imaging system in the light propagation direction. The collimation system receives radiation light introduced by the external telescope; the etalon system comprises a temperature control structure; the temperature control structure comprises a heat conduction ring wrapping the outer side of an etalon inner cylinder of the etalon system; and a plurality of annular heat pipes for circumferential heat conduction are embedded in the outer surface of the heat conduction ring. The device also comprises a sliding support structure which enables the lens barrel to freely slide along the optical axis direction. The temperature control system has the advantages that optical errors caused by thermal stress are effectively eliminated, thermal stability and thermal field uniformity are remarkably improved, and the temperature control system is simple in structure and high in reliability.

The invention provides a phase amplification microscopic imaging method with sub-angstrom level measurement precision. The method comprises the following steps: providing a phase cavity implementation method and connecting the phase cavity with an interference imaging system so as to effectively amplify a weak phase signal of a target sample; modeling the resonance effect in the phase cavity; and optimizing parameters of the phase cavity, such as a material of the phase cavity, a thickness of each layer of the phase cavity, and an illumination wavelength, to maximize amplification of the phase signal of the target sample. The phase cavity is arranged on the sample side of the interference imaging system. The method may further include obtaining a phase diagram through an interference imaging system based on laser illumination, and executing a transmission matrix-based model on the measured phase diagram to reconstruct a thickness mapping result, enabling effective detection of deep sub-wavelength size defects in the three-dimensional stacked sample. The measurement precision of the interference imaging system can reach 0.1 angstrom.

The application discloses a sea surface height inspection equipment layout method based on an interferometric imaging altimeter, belongs to the technical field of altimeter inspection, and is used for sea surface height inspection equipment layout, and comprises the following steps: obtaining position data of a Glider buoy and temperature-salinity-depth data of a profile observed by the Glider buoy; before a satellite passes, the Glider buoy and a GNSS buoy are simultaneously and regionally launched, and synchronous observation of the GNSS and the Glider buoy is realized; the Glider buoy is positioned when descending and ascending to the outcrop, is matched with a grid position in a swath range observed by the satellite, and sea surface height is inverted by using the temperature-salinity-depth data of the profile observed by the Glider buoy. The application is suitable for data characteristics of different resolutions of the interferometric imaging altimeter, realizes synchronous observation of sea surface height under satellite passing by using satellite data of different spatial resolutions, and accurately completes calibration inspection of the altimeter satellite.

The application relates to a method for in-situ measuring the dissolution rate of an optically measurable solute in an organic matter environment, and relates to the technical field of solute dissolution rate measurement. The method comprises steps S1 to S5. S1: obtaining a sample to be measured, and coating an inert film on a non-test surface of the sample to be measured to obtain a coated sample. S2: obtaining an initial three-dimensional image of the coated sample by coherent light interference imaging technology, and extracting an initial surface height at the test surface. S3: obtaining an organic matter solution, and continuously flushing the surface of the coated sample with the organic matter solution. S4: obtaining a three-dimensional image of the coated sample after flushing by coherent light interference imaging technology, and extracting a dissolution surface height at the test surface. S5: combining the molar volume of the sample to be measured, and calculating the dissolution rate according to the change rate of the surface height of the initial surface height and the dissolution surface height.

The invention discloses a compact shear speckle interference system, which is suitable for detection scenes with large view field and small view field in narrow space, and a replaceable front lens is arranged between an object to be detected and an interference imaging optical system and comprises a wide-angle lens, a standard lens, a micro-focus lens, an endoscopic lens and the like; the interference imaging optical system comprises a beam splitter prism, double interference arms and hyperboloid reflectors, and the two hyperboloid reflectors are tightly attached to the beam splitter prism; diffuse reflection speckle light of an object to be measured is divided into transmission light beams and reflection light beams by the beam splitter prism, the transmission light beams and the reflection light beams are transmitted through the double interference arms, reflected and focused through the curved reflector and then return along the same path, and interference fringe patterns carrying object deformation information are formed through beam combination interference. The PZT assembly drives the single curved-surface reflector to perform nanoscale micro-movement along the optical axis to realize phase modulation, and the two-dimensional precision displacement table drives the curved-surface reflector to perform micro-movement perpendicular to the optical axis to regulate and control the imaging shear amount. The optical system is compact in structure, excellent in dynamic response, flexible and adjustable in view field and high in optical stability.

The present application relates to a kind of non-contact measurement cell Young's modulus method, including quantitative phase microscopy system measurement cell phase diagram, by off-axis interference quantitative microscopic imaging system, phase delay caused by cell thickness, cell internal dry matter distribution is obtained by shooting;Further by the derivative and fluctuation of phase delay, qualitative contrast different cell Young's modulus size.The off-axis interference imaging system is composed of reference light path and sample light path, sample light path passes through transparent biological sample, reference light path and sample light path have a certain offset angle, and are coupled with sample light path to obtain the final interference figure;The present application can not only realize non-contact measurement cell demonstration modulus, but also still maintain good effect under low resolution low power lens, provide solution train of thought for large field of view parallel cell cluster Young's modulus measurement.

An imaging method includes: (I) simultaneously illuminating a scene with a first (second) diverging wave originating from a first (second) location and modulated with a first (second) shift-and-add-qualifying-code. A scatterer that scatters the first (second) diverging wave as a first (second) speckle. (II) Detecting, with a receiver, an interference signal, produced from interference between the speckle fields, and including a code temporally shifted with respect to the first SAA-code by a large-scale time-shift. (III) Circulantly correlating the interference signal with a reference SAA-code to generate a correlation signal. (IV) Determining the time-difference-of-arrival from the large-scale time-shift. (V) Determining a location of the scatterer by: determining, from the time-difference-of-arrival, a hyperbolic contour that locates the scatterer angularly; and determining, from one of (i) a small-scale time-shift of a peak of the correlation signal and (ii) a ranging delay, an elliptical contour that locates a range of the scatterer from the receiver.

This invention discloses a spaceborne near-space horizontal two-dimensional wind field interferometric imager based on a ring field of view and a full-link simulation method. The imager includes an optical system, a detector, and a data processing unit. The optical system includes a front conical mirror, a field stop, a collimating lens group, a Fabry-Perot interferometer, a narrowband filter assembly, and an imaging lens arranged sequentially along the optical path. This invention improves the spatiotemporal resolution of the instrument's detection.

The application provides a metal plate surface defect detection method and device, electronic equipment and storage medium, wherein the method comprises the steps of: irradiating the metal plate surface with at least two different direction interference systems to generate at least two interference images containing interference fringes extending along a preset direction; wherein the interference fringes of each interference image are independent of each other; dividing the interference images into several detection areas; wherein the extension direction of the detection area is perpendicular to the corresponding interference fringe direction; performing gray value analysis on the detection area to determine the surface defect condition of the metal plate; the detection area includes all detection areas of at least one interference image. The application generates interference fringe images extending in different directions through multi-directional interference imaging technology, and divides detection areas perpendicular to the interference fringe direction to form a detection grid that is orthogonally covered, so as to realize rapid detection of surface defects.

The invention relates to the technical field of defect detection, in particular to a full-field optical coherence tomography three-dimensional industrial defect detection system and method suitable for a large-size sample, and interference fringes generated by a full-field interference imaging system illuminate the sample; the three-dimensional displacement platform is controlled to transversely move the sample for multiple times according to a preset track, and the wavelength tunable laser is synchronously controlled to complete wavelength scanning within the exposure time of the area-array camera after each time of movement of the sample is completed; the area-array camera transmits three-dimensional data collected at each position of the sample to the controller; and the controller performs image reconstruction, splicing fusion and rendering display on the three-dimensional original data. According to the method, the full-field OCT technology of surface scanning and the laser frequency sweeping technology are integrated, local three-dimensional structure information of a large-size sample is obtained according to the principle of full-field frequency sweeping OCT, local reconstruction results of adjacent areas are spliced and fused by means of an image splicing algorithm, a complete three-dimensional imaging result is presented, and the three-dimensional imaging precision is improved. Therefore, defects on the upper surface, the lower surface and the interior of the whole large-size sample can be detected.

The invention relates to the technical field of optics, in particular to a nondestructive flaw detection device applied to a groove bottom of a sunken area of a vane crown of a guide vane, which comprises a loading support, a clamp for clamping the guide vane to be detected is arranged on the loading support, and the clamp is used for keeping the guide vane to be detected horizontally and transversely; the to-be-detected guide vane is provided with a vane crown, and the sunken part of the vane crown points to the front; the inner wall of the light absorption cylinder is provided with a black frosted surface; the outer contour of the light absorption cylinder is matched with the inner contour of the sunken part of the blade crown, and the light absorption cylinder is inserted into the sunken part; the groove bottom of the sunken part of the blade crown is exposed from an opening in the bottom of the light absorption cylinder; a laser interferometer is arranged on the front side of the loading support. A measuring light beam and a reference light beam of the laser interferometer are projected to the surface of the groove bottom of the blade crown sunken part without hindrance, the light absorption cylinder eliminates light interference caused by secondary reflection, clearer interference imaging is obtained, and the groove bottom of the blade crown sunken part is measured completely and accurately.

This invention discloses a method for three-dimensional tomographic imaging detection of interplanetary shock waves in satellite formations. The method includes the following steps: 1) Designing a satellite formation configuration with uniformly distributed interferometric baselines using an optimization algorithm based on observation requirements and satellite engineering constraints; 2) Measuring the baseline between any two satellites in the formation; 3) Combining all inter-satellite baselines to obtain three-dimensional spatial frequency sampling points for each frequency, forming a spatial transfer function; 4) Setting M observation frequencies for the interferometric imaging spectrometer, and obtaining tomographic surfaces corresponding to different heliocentric distances for each frequency point through inter-satellite interference; 5) Based on the principle of interferometric imaging, using a transformation algorithm from the spatial frequency domain to the spatial domain, sequentially performing two-dimensional imaging inversion on tomographic surfaces at different heliocentric distances, and then synthesizing a three-dimensional tomographic image; 6) Repeating steps 2) to 5) to achieve continuous observation and imaging, forming a three-dimensional tomographic image that evolves over time.

This invention discloses a method and system for interferometric imaging detection of satellite formations flying in the same direction in space. The method includes: setting initial parameters for a central satellite or virtual central satellite and N accompanying satellites in a formation; calculating the relative orbital elements of the N accompanying satellites; calculating the absolute orbital elements based on the relative orbital elements; predicting the position of each accompanying satellite based on the absolute orbital elements, and calculating the detection baseline formed by every two accompanying satellites; calculating the baseline distribution uniformity measurement function based on the detection baseline, using it as the objective function, and exploring optimization using an optimization algorithm to obtain the optimal solution; repeating the above steps based on the optimal solution to obtain a detection baseline with continuity and uniformity in both the radial and circumferential directions; and performing imaging inversion based on the detection baseline and the principle of interferometric imaging. This invention effectively improves the density of baseline coverage and reduces the deployment difficulty compared to deploying multiple satellites in a circle.

The application relates to the technical field of industrial robots, in particular to an intelligent control system and method for an industrial robot based on machine vision, which comprises a polarization interference imaging module, a dielectric characteristic analysis module, a dynamic clamping force field generation module, a multi-view field fusion module, a sub-pixel compensation module and an electromagnetic shielding cooperation module; wherein: the polarization interference imaging module is used for acquiring a polarization characteristic spectrum of a workpiece surface; the dielectric characteristic analysis module is used for calculating a surface dielectric constant distribution; the dynamic clamping force field generation module is used for generating a vacuum adsorption force field distribution graph with a pressure gradient; and the multi-view field fusion module generates an anti-slip three-dimensional grabbing track through a parallax compensation algorithm. Through the combination of the polarization interference imaging, dielectric characteristic analysis, sub-pixel compensation and electromagnetic shielding technologies, the grabbing precision and stability of the industrial robot in a complex environment are significantly improved, and external interference is effectively inhibited through electromagnetic shielding.

The invention discloses an abnormal pixel identification method for an interference image, and solves the technical problem of abnormal pixel misjudgment caused by a cross-pixel phenomenon in an existing interference image processing method. Acquiring three-dimensional interference image data, and extracting a breadth dimension data sequence frame by frame and line by line; polynomial fitting is carried out on the sequence to construct a trend curve, and the trend deviation degree of original data and the fitting curve is calculated; preliminarily judging abnormal pixels based on a dynamic threshold value and constructing a three-dimensional abnormal distribution matrix; through space-time consistency verification, counting abnormal frequencies of each spatial position in all frames, discriminating fixed anomalies and temporary noise, and finally obtaining real abnormal pixel spatial distribution; in addition, the method can overcome inter-frame abnormal fluctuation caused by factors such as environment, remarkably improves the accuracy and reliability of abnormal pixel identification of the interference image, and is suitable for image preprocessing of equipment such as an interference imaging spectrometer.