99 results about "Spectral transmittance" patented technology

The invention provides an underwater image enhancement method based on a water diffusion physical model, and relates to the technical field of underwater image enhancement, and the method comprises the steps: S101, inputting a local block of an underwater image to a convolutional neural network, and predicting an attenuation coefficient matrix and a diffusion matrix of a water body; s102, constructing a water diffusion control equation based on the attenuation coefficient matrix and the diffusion matrix of the water body; s103, performing multi-scale diffusion on the underwater image in a frequency domain based on a water diffusion control equation to obtain a reconstructed image; s104, recovering a color channel of the reconstructed image through a spectral transmittance model to obtain an enhanced image; and S105, outputting an enhanced image. According to the method, by estimating the attenuation and scattering coefficients of the light underwater, image enhancement which better conforms to the physical diffusion characteristics of the light underwater is achieved, color distortion and image blurring are effectively avoided, and the physical interpretability and reliability of an enhancement result are improved.

The invention discloses a printing color closed-loop control system based on spectral analysis, and relates to the technical field of computer processing, and the system comprises the following steps: S01, collecting the spectral reflectivity data of a plurality of key color blocks on a printed matter measurement and control strip in real time through an online high-speed spectrometer at the frequency of not less than 100 color blocks per second; s02, constructing a color prediction model, wherein the model receives the spectral reflectivity data and outputs absorption scattering characteristics, the spectral transmittance of ink and dot expansion, trapping and overprinting effects in the printing process; s03, setting a dynamic tolerance threshold value delta Et based on a chromatic aberration formula according to the color precision requirement of the printed matter, and judging the absorption and scattering characteristics, the spectral transmittance of the ink and a grading tolerance interval in which the dot expansion, trapping and overprinting effects in the printing process are consistent with visual perception; and S04, converting the spectral reflectivity data acquired in real time into a CIELAB color space irrelevant to equipment, and comparing the spectral reflectivity data with a preset standard color target value. According to the method, the problems of different standards and color drift caused by artificial experience difference and visual fatigue are solved.

The noise performance of the image sensor is improved by using hundreds of pixel-to-pixel comparisons that all contribute to information about a given pixel. This allows accurate determination of image chromaticity even at extremely low signal-to-noise ratios. In other embodiments, filters of a non-conventional spectral transmittance function are employed to reduce metamerism, enabling resolution of scene information that is not visible to the human eye. Yet other embodiments relate to manufacturing a sparse matrix of transparent pedestals on an array of image photosensors. When a color resist is applied thereafter, these pedestals produce a change in thickness of the resulting resist layer, resulting in the pixels having a different spectral response despite the use of the same color resist. Yet other embodiments relate to image sensor arrangements that enable generation of red, green, blue, and NIR output data using only four conventional (red, green, blue, cyan, magenta, yellow) color resists. Numerous other novel features and arrangements are also detailed.

The invention is suitable for the technical field of ceramic materials, and relates to lanthanum calcium sulfide transparent ceramic powder with wide spectrum transmittance and a preparation method of the lanthanum calcium sulfide transparent ceramic powder. The preparation method specifically comprises the following steps: weighing nitrate containing La and Ca according to a specific molar ratio, respectively dissolving the nitrate containing La and Ca into deionized water, and fully mixing to obtain a solution A; adding a thiourea solution into the solution A, and stirring to obtain a mixed solution; heating and continuously stirring the mixed solution, and carrying out hydrolysis and polymerization reaction to form white sol; then, the sol is placed in a drying oven to be subjected to dehydration treatment until the sol is converted into dry gel; and heating the dried gel at high temperature to obtain lanthanum calcium sulfide precursor powder. And putting the lanthanum-calcium sulfide precursor powder into an atmosphere furnace, and carrying out vulcanization reaction in a sulfur-containing atmosphere to prepare the lanthanum-calcium sulfide powder. The preparation method has the advantages that the operation process is simple, the prepared powder is uniform in particle size, high in purity and excellent in dispersity, and the optical performance of the transparent ceramic can be improved.

An optical laminate having an optical functional layer on at least one surface of a substrate, the optical functional layer containing a colorant containing a plurality of pigments and a binder resin, the optical laminate having an average spectral transmittance of 25% or less at a wavelength of 350 nm to 750 nm, an average spectral transmittance of 85% or more at a wavelength of 850 nm to 2500 nm, and an average spectral transmittance of 25% or less at a wavelength of 850 nm to 2500 nm. When the maximum spectral transmittance at a wavelength of 350 nm or more and less than 460 nm is set as T1, the maximum spectral transmittance at a wavelength of 460 nm or more and less than 570 nm is set as T2, and the maximum spectral transmittance at a wavelength of 570 nm or more and 750 nm or less is set as T3, at least one of the following formulae (1A) and (2A) is satisfied, where T1 is the maximum spectral transmittance at a wavelength of 350 nm or more and less than 460 nm, T2 is the maximum spectral transmittance at a wavelength of 460 nm or more and less than 570 nm, and T3 is the maximum spectral transmittance at a wavelength of 570 nm or more and less than 750 nm. 0.1 < = T1 / T2 < = 10 (1A) 1 < = T3 / T2 < = 20 (2A)

Calibrating a spectral imaging device includesproviding first calibration light, with first calibration spectrum (IMPBF),coupling the first calibration light to the device,obtaining a first measured profile of the first calibration light by recording first detector pixel signals during scanning a control parameter of a Fabry-Perot interferometer of the device,obtaining a second measured profile of the first calibration light by recording second detector pixel signals during scanning,determining a first simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of first detector pixels, previously measured spectral transmittance function, and first calibration data,determining a second simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of second detector pixels, previously measured spectral transmittance function, and the first calibration data, andmodifying first calibration data until simulated profiles match with corresponding measured profiles.

The present invention relates to an optical laminate and an image display device comprising same, the optical laminate comprising: a thin film glass; a first hard coating layer formed on one surface or both surfaces of the thin film glass; and a second hard coating layer formed on the first hard coating layer, wherein the first hard coating layer includes a thermosetting resin and a UV absorber, and the second hard coating layer includes a light-transmitting resin, and can provide the optical laminate and the image display device comprising same, the first hard coating layer having sufficient impact resistance, including the UV absorber so as to able to block 95% or more of ultraviolet rays with a wavelength of 300-380 nm, having excellent spectral transmittance of 80% or higher in the 440 nm wavelength region, and having excellent hardness, scratch resistance, adhesiveness and flexibility.

A covering sheet according to the present invention is used for covering an adherend. The covering sheet includes a first surface and a second surface. The first surface faces the side opposite the adherend. The total light transmittance is 70% or more. The image clarity in a transmission method using an optical frequency comb having a width of 2.0 mm is 5.0% or more. The specular gloss on the first surface with an incident angle of 60° is 30 or less. The maximum spectral transmittance at a wavelength of 300-350 nm is 1.0% or less.

This invention proposes a rapid verification method for the imaging performance of an aperture-coded infrared hyperspectral imaging system. This method uses an N×M filter array as the indoor imaging target. This array includes a central infrared window and multiple filters with different center wavelengths surrounding the infrared window, containing rich spectral feature information and geometric and spatial positional information of the filters. Utilizing a large-area blackbody and a collimator with a large focal plane, the system can capture all the necessary information from the filter array. After image reconstruction, using the data from the central window as a reference, the spectral transmittance curves of each filter can be calculated quickly and accurately, thereby verifying the system's ability to acquire spectral information. The system's ability to acquire geometric information can also be verified by observing the geometry and relative positions of the filters in each spectral channel. This invention provides an efficient, reliable, and rapid verification method for aperture-coded infrared hyperspectral imaging systems.

The invention discloses a method and a system for measuring and calculating a signal-to-noise ratio of an uncooled infrared detection system, relates to the technical field of infrared target detection, and solves the problems that parameters of an uncooled detector are lost during research and development of a low-cost infrared system and detection effects of different view field angles of a large-view-field system are different. The radiance at the entrance pupil is calculated through the target radiance and the atmospheric transmittance, the irradiance and the illuminance from the pupil to the center of an image plane are derived based on optical system parameters, the irradiance related to a field angle is obtained according to a geometrical relationship for large-field edge illuminance attenuation, and the irradiance related to the field angle is obtained according to a geometrical relationship for a point target which is not filled with a photosensitive element. Calculating the projection on the photosensitive element and the signal radiation quantity received by the pixel; the noise equivalent temperature difference is tested by adopting a collimation method, and the value is obtained by combining a collimator and the spectral transmittance of an optical system so as to calculate the noise power; and the signal-to-noise ratio is calculated by combining the signal amplitude-flux. The method solves the problem of parameter loss through actually measured noise equivalent temperature difference value estimation, considers view field energy attenuation in the evaluation process, and is suitable for fine evaluation of a large view field system.

To reduce an error accompanying the generation of images of a plurality of wavelength bands.SOLUTION: A method includes: acquiring first information indicating a relative position between an encoding element including a plurality of regions having spectral transmittance different from each other and an image sensor that detects light transmitted through the encoding element; and correcting data including second information about the spatial distribution of the spectral transmittance on the basis of the first information. The data is used for processing of generating four or more spectral images on the basis of an image acquired by causing the image sensor to detect the light transmitted through the encoding element. Each of the four or more spectral images indicates an image corresponding to one wavelength band of the four or more wavelength bands.SELECTED DRAWING: Figure 1A

The present application relates to an optical filter having a substrate and a dielectric multilayer film laminated on at least one main surface side of the substrate and as an outermost layer, wherein the substrate contains a resin film containing a resin and a pigment (A) which is a near-infrared absorbing pigment, for which, in a spectral transmittance curve of a coating film obtained by dissolving the pigment (A) in the resin and coating on an alkali glass plate, specific spectral properties are satisfied.

The invention belongs to the technical field of solar cells, and particularly relates to a multi-junction solar cell anti-reflection film layer and a preparation method thereof. The multi-junction solar cell anti-reflection film layer provided by the invention comprises a low-refractive-index amorphous carbon layer, a medium-refractive-index amorphous carbon layer and a high-refractive-index amorphous carbon layer which are stacked in sequence, the refractive index of the low-refractive-index amorphous carbon layer is 1.7-1.9, the optical thickness is 1 / 4 of the wavelength of 500nm, and the layer thickness is 60-80nm; the refractive index of the medium-refractive-index amorphous carbon layer is 2.0-2.2, the optical thickness of the medium-refractive-index amorphous carbon layer is 1 / 4 of the wavelength of 700 nm, and the thickness of the medium-refractive-index amorphous carbon layer is 70-90 nm; the refractive index of the high-refractive-index amorphous carbon layer is 2.3-2.5, the optical thickness of the high-refractive-index amorphous carbon layer is 1 / 4 of the wavelength of 1100 nm, and the layer thickness is 110-120 nm. The anti-reflection film layer provided by the invention has the advantages of wide spectrum, high transmittance, excellent environmental stability and flexible refractive index adjustability.

The invention belongs to the field of environmental protection and micro-plastic identification, and discloses a micro-plastic infrared characteristic spectrum extraction and efficient and accurate identification method, which comprises the following steps of: 1, acquiring infrared spectrum data of a micro-plastic sample, and constructing a micro-plastic spectrum database; 2, extracting a characteristic spectrum from the infrared spectrum data in the step 1 by adopting a progressive two-step method combining equal-interval sampling and a competitive self-adaptive reweighted sampling algorithm; step 3, performing standard normal transformation on the transmittance of the characteristic spectrum in the step 2; and 4, constructing a feature training set and a feature test set by taking the transmittance of the infrared spectrum transformed in the step 3 as input and the micro-plastic type as output. Training the artificial neural network model by adopting the feature training set, and optimizing hyper-parameters in the model through the feature test set by applying a genetic algorithm to form a final micro-plastic identification artificial neural network model; and step 5, for micro-plastics to be identified, obtaining the characteristic transmittance of the micro-plastics to be identified through the spectral data obtained in the step 1 and the characteristic wave number extracted in the step 2, performing standard normal transformation on the micro-plastics to be identified through the step 3, inputting the transformed infrared spectral transmittance into the micro-plastic identification artificial neural network model, and giving the type of the micro-plastics. And identification of the micro-plastic is realized. According to the method, traversal sampling of the whole spectrum data set is effectively avoided, the extraction efficiency of the characteristic spectrum is improved, hyper-parameter optimization is performed on the artificial neural network model by adopting the genetic algorithm, overfitting of the model is effectively prevented, and the generalization ability of the model is improved.

Provided are a method and a device for rapidly and stably quantifying the spectral intensity of fluorescent emissions by increasing the number of fluorescent dyes that can be used simultaneously. The device comprises a filter control unit 2, a filter (spectral modulator) 3, a sensor array 4, a storage unit 5, and a regression model 6. The filter control unit 2 controls the spectral modulator 3. The spectral modulator 3 modulates spectral transmittance, and includes a first polarizer 32a, a liquid crystal variable retarder 31, and a second polarizer 32b. The sensor array 4 observes an observed object 8 including a plurality of fluorescent dyes through the spectral modulator 3. The storage unit 5 stores the luminance values of camera pixels captured under N types of modulation, as N-dimensional feature vectors. The regression model 6 is trained using the feature vectors under the modulation of each fluorescent dye, and quantifies the fluorescent dyes to reconstruct the intensity image 9 of each fluorescence.

The present invention relates to a method for determining at least one filter for a visual device intended to be placed in front of a user's eye, the at least one filter being capable of improving the user's visual comfort and / or visual performance, the method comprising the following steps: ‑ determining the spectral transmittance of the ocular medium of at least one eye of the user; and ‑ determining at least one filter based on the determined spectral transmittance of the user's ocular medium, such that the filter has a spectral transmittance distribution comprising: o a first portion having a maximum transmittance value between 380 nm and a predetermined wavelength threshold, o a second portion with decreasing transmittance values ​​between the predetermined wavelength threshold and 670 nm. The present invention also relates to a filter whose spectral transmittance is calculated based on the spectral transmittance of the user's ocular medium. The present invention further relates to a set of filters, wherein each filter in the set has a spectral transmittance based on the spectral transmittance of the ocular medium of users of different ages.

The application discloses a spectral imaging method based on an RGB camera and a broadband filter coding. According to a camera spectral response function, an optimized parameter of a broadband filter and a spectral reconstruction network construction design stage, an end-to-end optimization framework is constructed. Then, the end-to-end optimization framework is trained according to a hyperspectral dataset to obtain a trained end-to-end optimization framework of the design stage and obtain a theoretical design parameter of the broadband filter. Then, an actual spectral transmittance function of the combined broadband filter and a final spectral reconstruction network are obtained. Finally, an RGB imaging system is built and a scene image is obtained, which is input into the final spectral reconstruction network to obtain a hyperspectral image. The application is based on the wavelength coding spectral imaging principle, a specially designed broadband filter is added in the imaging light path, and the input image of the reconstruction algorithm is increased from 3 channels to multiple channels through multiple imaging, so that the spectral accuracy of the reconstruction result can be effectively improved.

A device used in a system for generating spectral images corresponding to four or more wavelength bands includes optical filters different in spectral transmittance and an image sensor that detects light through the optical filters, in which when the wavelength bands are given numbers in an ascending or descending order of a central wavelength, the image sensor outputs i-th mask data by detecting only light corresponding to an i-th wavelength band and outputs j-th mask data by detecting only light corresponding to a j-th wavelength band among the wavelength bands, a correlation coefficient between the i-th and j-th mask data is greater than or equal to 0.8 in a combination where |i−j| is 1, and is equal to or less than 0.8 in at least one combination where |i−j| is greater than or equal to 2 and less than or equal to N−1.

The invention relates to the technical field of camera supports used during driving, in particular to a high-adaptability camera which comprises a lens storage box, a camera body is installed on one side of the lens storage box, a lens seat groove is formed in one side of the lens storage box, and a lens installation seat sliding in the longitudinal direction of the lens seat groove is arranged in the lens seat groove. The lens storage box is internally provided with a lens placing seat which moves along the vertical direction of the plane where the lens mounting seat is located, a plurality of lenses are placed on the lens placing seat, the lens storage box is internally provided with a lifting assembly and a positioning assembly, the lifting assembly drives the lens mounting seat to lift, and the positioning assembly drives the lenses to rotate; an arc-shaped groove is formed in the top of the inner side of the lens mounting seat, and the lens is sleeved with a lens seat. The technical problems that it is difficult for an existing camera to intelligently switch lenses according to the external environment, automatically adjust the spectrum transmittance according to the weather by adopting a switchable optical filter, and adapt to the imaging requirements of different weather conditions such as foggy days and rainy days are solved.

This invention discloses a rapid calculation method for the rearward infrared radiation intensity of an S-curve nozzle, belonging to the field of infrared radiation characteristic simulation of aero-engine exhaust systems. The method comprises the following steps: determining the design parameters of the S-curve nozzle and exhaust mixer components; establishing projection models of the key shielding sections of the exhaust mixer and S-curve nozzle; calculating the projected area of ​​each component after shielding by the S-curve nozzle using an image method; calculating the flow field parameter distribution and component surface temperature of the S-curve nozzle; calculating the axial length and volume of the visible region of the exhaust gas in the S-curve nozzle; calculating the spectral transmittance and spectral radiance of the exhaust gas along the nozzle outlet centerline within the visible region of the exhaust gas, as well as the spectral radiance intensity of the exhaust gas; calculating the infrared spectral radiance intensity of the wall surface; and integrating the spectral radiance to obtain the total infrared radiation intensity. This method solves the problems of existing technologies where the simulation calculation of the infrared radiation characteristics of S-curve nozzles is complex and time-consuming, and rapid calculation methods are only applicable to axisymmetric nozzles and cannot simulate the shielding structural characteristics of S-curve nozzles.

The invention relates to the technical field of optical measurement, and provides a large-aperture optical lens spectrum transmittance two-dimensional distribution test device and method, and the device comprises a light source module, and a monochromator module, a light beam modulation module, a test sample table and a detection module which are sequentially arranged along the light beam output direction of the light source module; the test sample table is a two-dimensional adjusting table, is used for arranging a tested optical lens, comprises a vertical optical axis direction horizontal translation device and an optical axis direction rotating device, and realizes two-dimensional position adjustment when the tested optical lens is measured; the detection module comprises a two-dimensional displacement table and a detector arranged on the two-dimensional displacement table, and the two-dimensional displacement table comprises a first translation device translating back and forth in the optical axis direction and a second translation device translating horizontally in the direction perpendicular to the optical axis. According to the invention, the positioning of the lens on a two-dimensional plane can be accurately controlled, and the test of the spectrum transmittance of different areas of the optical lens is realized.

The present invention provides an eyeglasses lens supply system and a technique related thereto, the eyeglasses lens supply system comprising a display unit that displays a relationship selected on the basis of at least one of relationships 1-3, the colors of the glasses lens corresponding to a plurality of spectral transmittances respectively are set according to the solar radiation intensity of a region where the glasses lens is used and the spectral transmittances of eyes of a wearer of the glasses lens.

The invention provides a light source selection method, device and equipment based on color painting pigment transmittance and a medium, which can be applied to the technical field of cultural relic protection and spectral analysis. The light source selection method based on the color painting pigment transmittance comprises the steps that spectral power distribution of a plurality of candidate light sources used for providing illumination for a color painting cultural relic, various pigment types of a target color painting part on the color painting cultural relic and the thicknesses of pigment layers corresponding to the various pigment types are obtained; according to the identifiers of the various pigment types, selecting respective target spectrum transmittance models of the various pigment types; inputting the spectral power distribution and the thickness of the pigment layer into a target spectral transmittance model of each pigment type, and outputting the spectral transmittance of each pigment type to the candidate light source; according to the spectral transmittance of each pigment type and the spectral power distribution of the candidate light source, predicting the transmission power of the candidate light source penetrating through the pigment layer; and selecting a target light source according to the transmission power.

The application discloses a kind of symmetric narrow-band spectral image driven multi-primary color display method and device, it is related to color image display technical field, method includes: based on the spectral reflectivity of target to be photographed calculation three stimulus value;Based on the spectral transmittance of any channel in the narrow-band spectral camera to be used, the spectral emission power of corresponding primary color channel in the multi-primary color display screen to be used and the spectral reflectivity of target to be photographed, the three stimulus value of color output by the multi-primary color display screen to be used is calculated;According to the three stimulus value of target to be photographed and the three stimulus value of color output by the multi-primary color display screen to be used, color difference data is calculated;Based on color difference data, the center wavelength and bandwidth of any channel in the narrow-band spectral camera to be used are adjusted;Image shooting is carried out to target to be photographed by the adjusted narrow-band spectral camera to be used, and the image obtained by shooting is used as the driving image of the multi-primary color display screen to be used, to obtain target color display image.The application improves the accuracy of color reproduction of color target scene.

To solve the problem of the conventional technology that the expected heating effect cannot be obtained when an existing heated cigarette is directly applied to an infrared heated smoking device. The present invention discloses an aerosol-generating article for an infrared-heated smoking device, comprising a sheet and an aerosol-generating matrix enclosed within the sheet. The sheet has a thickness of ln(TS a ) × D / D0>-2.00 and / or ln(TS b )×D / D0>-0.30, where TS a The infrared spectrum transmittance curve of the sheet is 3500~3000cm -1 Valley bottom permeability coefficient, TS b is the infrared spectral transmittance curve of the sheet from 1750 to 1550 cm -1 where D is the thickness of the sheet, and D0 is 0.01 mm. By selecting a sheet of an appropriate thickness depending on the thickness of the sheet, the aerosol-generating article can make the most of the thermal radiation characteristics of the infrared-heated smoking device.

This invention relates to a filter having a substrate and a dielectric multilayer film laminated on at least one main surface of the substrate as the outermost layer, wherein the substrate comprises a resin film comprising resin and a pigment (A), the pigment (A) being a near-infrared absorbing pigment, and the pigment (A) satisfies specific spectral characteristics in the spectral transmittance curve of a coated film obtained by dissolving the pigment (A) in the resin and coating it onto an alkali glass plate.

This invention discloses a method and system for online determination of the surface processing status of silicon carbide wafers, belonging to the field of silicon carbide processing technology. The method provided by this invention includes the following steps: providing a silicon carbide wafer to be tested, the wafer having completed at least one polishing process; measuring the online spectral transmittance data T of the silicon carbide wafer at a predetermined visible light wavelength in a non-contact manner at a detection station; comparing the online spectral transmittance data T with a judgment threshold pre-stored in a database in real time, the judgment threshold being associated with different surface processing statuses of the silicon carbide wafer; based on the comparison result, outputting the surface processing status determination result of the silicon carbide wafer to be tested in real time, and generating corresponding production flow control instructions. This invention, by measuring the spectral transmittance in the visible light band and directly associating it with a pre-stored process status judgment threshold, achieves online, rapid, non-destructive determination and automatic sorting of the processing status of silicon carbide wafers on the polishing production line.

An optical filter (1a) has a thickness of 120 μm or less and satisfies the following requirements (i), (ii), (iii), and (iv): (i) an average transmittance in a wavelength range of 450 nm to 600 nm is 74% or more; (ii) a maximum transmittance in a wavelength range of 750 nm to 1080 nm is 1% or less; (iii) an infrared cut-off wavelength being a wavelength which lies in a wavelength range of 550 nm to 700 nm and at which a spectral transmittance is 50% is in a range of 600 nm to 680 nm; and (iv) an ultraviolet cut-off wavelength being a wavelength which lies in a wavelength range of 350 nm to 500 nm and at which a spectral transmittance is 50% is in a range of 350 nm to 420 nm.

To provide a hard coat film which is capable of blocking ultraviolet rays and causes less loss of color and brightness of a display device, a polarizing plate using the hard coat film, and a display device.SOLUTION: A hard coat film is provided, having a hard coat layer containing an ultraviolet absorber laminated on one surface of a substrate made of triacetyl cellulose. The hard coat film exhibits a spectral transmittance of less than 0.1% at 380 nm wavelength, less than 0.1% at 390 nm wavelength, 0.1% to 1%, inclusive, at 400 nm wavelength, 2% to 10%, inclusive, at 410 nm wavelength, 25% to 40%, inclusive, at 420 nm wavelength, 65% or greater at 430 nm wavelength, 80% or greater at 440 nm wavelength, 85% or greater at 450 nm wavelength, and 85% or greater at 460 nm wavelength.SELECTED DRAWING: Figure 1

The application provides an underwater image enhancement method based on a water diffusion physical model, and relates to the technical field of underwater image enhancement. The method comprises the following steps: S101, inputting a local block of an underwater image into a convolutional neural network to predict an attenuation coefficient matrix and a diffusion matrix of water; S102, constructing a water diffusion control equation based on the attenuation coefficient matrix and the diffusion matrix of water; S103, performing multi-scale diffusion on the underwater image in a frequency domain based on the water diffusion control equation to obtain a reconstructed image; S104, restoring a color channel of the reconstructed image through a spectral transmittance model to obtain an enhanced image; and S105, outputting the enhanced image. The method estimates the attenuation and scattering coefficients of light underwater, realizes image enhancement that is more in line with the physical diffusion characteristics of light underwater, effectively avoids color distortion and image blurring, and improves the physical interpretability and reliability of the enhanced result.