112 results about "Optical density" patented technology

The invention discloses an edge spraying compensation control method based on intelligent visual feedback. The method comprises the following steps: performing space scanning on a to-be-sprayed workpiece to obtain spraying image data, and establishing a space corresponding relation between a spray gun motion coordinate and a workpiece surface coordinate; registering the real-time spraying image by using the corresponding relation, identifying a geometric boundary line, brightness gradient change and a coating adhesion area of the edge of the workpiece, and generating edge feature data; according to the difference between the edge feature data and the target spraying image, the spraying coverage deviation and the boundary overlapping error are calculated, the coating thickness change trend, the optical density change rate and the boundary direction offset are extracted, and the spraying gun posture adjustment amount, the spraying distance correction amount, the spraying pressure correction amount and the path speed correction amount are generated; the angle, the spraying distance, the pressure and the movement speed of the spray gun are dynamically adjusted according to the parameters; according to the method, real-time visual feedback and self-adaptive compensation control in the spraying process are achieved, and the uniformity and consistency of the coating on the edge of the workpiece are effectively improved.

The invention relates to the technical field of workpiece alignment, in particular to a machined workpiece automatic alignment method and system based on image measurement, and the method comprises the following steps: collecting a workpiece image, analyzing a local curvature change rate, adjusting sampling density, reconstructing surface features, generating micro-topography data, calculating a stability score, and outputting an attitude correction parameter. And tracking a time sequence deviation derivation instruction response deviation track, fitting a deviation curve to invert delay mapping to generate an error correction table, and mapping a control signal to adjust a step length to generate an adaptive driving instruction. According to the method, the morphological stability score is calculated through the ratio of the boundary curvature continuity to the area compactness of the equal-optical-density region, accurate judgment on the boundary contour under different image conditions is achieved, the response offset function is constructed with the help of the least square method, the execution error correction table is mapped, the response precision and execution consistency of the alignment instruction are improved, and the accuracy of the alignment instruction is improved. And the alignment efficiency and the posture stability of the workpiece under the complex morphology condition are improved.

The invention discloses a hand motion FNIRS signal classification method based on t distribution optimization feature extraction, and the method specifically comprises the steps: employing a portable functional near-infrared collection device to collect an optical density signal of a forehead cortex brain region during the motion execution period during the operation of the device; after pretreatment, the concentration of oxyhemoglobin HBO and the concentration of deoxidized hemoglobin HBR are calculated according to the corrected Beer-Lambert law; according to motion execution and resting state segmentation data, time domain features and time-frequency domain features of oxyhemoglobin concentration data signals of each channel of each experiment test are extracted, and a first feature matrix is formed; performing kernel density estimation and kurtosis and skewness test on the first feature matrix to obtain a second feature matrix, performing t distribution on each corresponding feature satisfying normal distribution in the second feature matrix of the motion execution and resting states, and optimizing feature selection on the basis to obtain an optimized third feature matrix; the optimized third feature matrix is used as classifier input, a brain-computer interface system model training result is obtained, and effective feature selection and extraction are achieved; according to the method, the brain-computer interface system feature extraction of the hand motion FNIRS signals can be optimized, so that the classification performance is improved.

Disclosed techniques evaluate the visual field of a patient's eye using deep learning techniques. A computer system obtains a plurality of cross-sectional scan images of a retina captured by an optical coherence tomography (OCT) device. The retina has an inner retinal layer. A retinal optical texture analysis (ROTA) map of the inner retinal layer is generated from the plurality of cross-sectional scan images. The ROTA map includes a plurality of pixels, and each pixel of the ROTA map corresponds to a respective optical texture signature value S providing information about tissue composition and optical density of the inner retinal layer at a respective retinal location. The computer system applies a machine learning model to process the ROTA map of the inner retinal layer to determine visual field sensitivity of the retina.

The invention relates to the technical field of microorganism co-culture fermentation, and discloses a method for producing L-carnitine soybean meal by applying a neural network to optimize fermentation conditions, and the method comprises the following steps: establishing a double-bacterium single-culture control group, collecting a double-bacterium dual-wavelength response data set, and constructing a two-dimensional geometric feature space to obtain a strain feature fingerprint slope; establishing a double-bacterium co-culture fermentation group, decomposing the real-time mixed optical density value to obtain double-bacterium estimated concentration, and constructing an enhanced input data set; then building a bimodal prediction model to output a predicted value of the L-carnitine content; and finally, setting an optimization objective function containing a yield deviation item, a phase regression item and a control smoothing item, and solving to obtain an optimal control input sequence. According to the invention, precise decoupling of the growth state of double bacteria and metabolic phase cooperative regulation and control are realized, information dimension limitation of traditional mixed optical density signals is broken through, and time sequence matching and yield stability of L-carnitine synthesis are guaranteed.

This invention discloses an infrared narrow-band passband and wide-cutoff-band high-optical-density filter based on a CaF2 substrate. It comprises a front film system and a back film system designed on both sides of the CaF2 substrate, with each film system consisting of alternating deposits of Ge and ZnS. The front film system is: 0.762(0.5HL0.5H)^M1 + 1.246(0.5LH.5L)^M2; the back film system is: 0.56(0.5HL0.5H)^M3 + 0.39(0.5HL0.5H)^M4 + 0.28(0.5HL0.5H)^M5 + 0.2(0.5HL0.5H)^M6L. The resulting filter, when tested with a spectrometer, achieves a cutoff bandwidth of 1000nm-7100nm and 8500nm-20000nm, with an average cutoff optical density reaching OD4; the transmission band of 7669±120nm has an average transmittance of 98.85%, and a half-wavelength of 470nm±30nm.

Embodiments of a deadfront article are provided. The deadfront article includes a substrate having a first surface and a second surface. The deadfront article also includes a semi-transparent layer disposed onto the second surface of the substrate. The semi-transparent layer has a region of a solid color or of a design of two or more colors, and the semi-transparent layer has a first optical density. Further, the deadfront article includes a contrast layer disposed onto the region. The contrast layer is configured to enhance visibility of the color(s) of the semi-transparent layer.

The invention provides a light source device and a projector, which have a rectangle extending in one direction and generate illumination light with suppressed optical density. This light source device is provided with: a light source unit that emits light including a first light beam; a light amplification optical system that generates amplified light obtained by amplifying light along a first axis; an overlapping optical system that overlaps the amplified light emitted from the light amplifying optical system with a region to be illuminated; and a light scanning unit that scans the amplified light incident from the light amplification optical system in a direction along a second axis orthogonal to the first axis in the region to be illuminated, a cross-section of the first light beam based on a surface orthogonal to the optical axis of the light amplification optical system having a shape having a long side and a short side, the short side of the first light beam being along the first axis.

An optical filter has an average optical transmission of greater than about 50% in a visible wavelength range (e.g., wavelengths from about 420 nm to about 550 nm) and an optical density greater than about 1.5 in an infrared wavelength range (e.g., wavelengths from about 650 nm to about 800 nm). The optical filter can have a sharp band edge between the visible and infrared ranges. For example, a change in percent transmission of at least about 30% can occur over a wavelength range not greater than about 10 nm wide and / or the slope of the band edge can be greater than about 5% / nm. An optical system includes the optical filter disposed between an emissive display and an optical sensor.

According to the blood vessel blood oxygen saturation degree calculation method based on the multispectral eye fundus image, blood vessel skeleton extraction and blood vessel topological graph construction are introduced in the method, and refined description of a blood vessel structure is achieved. The blood vessel radius self-adaptive calculation is carried out based on the blood vessel topological graph, the blood vessel positioning precision is improved, and a more accurate pixel value basis is provided for subsequent blood vessel internal and external pixel value calculation. According to the method, a light intensity ratio compensation mechanism is introduced, in 548nm light density calculation, a 605nm extravascular pixel value is converted into equivalent 548nm incident light intensity through a pre-calibrated light intensity ratio, the difference of reflection characteristics of tissues to different wavelengths is eliminated, the accuracy of a light density calculation result is improved, and then the accuracy of a blood oxygen saturation degree calculation result is improved.

The application provides a display panel and a manufacturing method thereof. The display panel comprises a functional additional area, an array substrate, a light-emitting functional layer, a thin film packaging layer and a color film layer are arranged in the functional additional area in a stacked manner, the color film layer comprises a first black matrix and color resistance units between the first black matrix; wherein the first black matrix comprises a first main body part and first lap parts on both sides of the first main body part, the first lap parts and the color resistance units have overlapping parts, by making the thickness of the first main body part less than the thickness of the first lap parts, the optical density of the first black matrix in the fingerprint identification optical path is reduced, thereby increasing the optical transmittance of the functional additional area, and meanwhile, the first black matrix can also consider the screen color of the display panel.

An image is rendered based a neural radiance field (NeRF) volumetric representation of a scene, where the NeRF representation is based on captured frames of video data, each frame including a color image, a widefield IR image, and a plurality of depth IR images of the scene. Each depth IR image is captured when the scene is illuminated by a different pattern of points of IR light, and the illumination by the patterns occurs at different times. The NeRF representation provides a mapping between positions and viewing directions to a color and optical density at each position in the scene, where the color and optical density at each position enables a viewing of the scene from a new perspective, and the NeRF representation provides a mapping between positions and viewing directions to IR values for each of the different patterns of points of IR light from the new perspective.

The utility model discloses a kind of fluorescent electronic quality control card and quality control card system, fluorescent electronic quality control card includes attenuating sheet and light source, the light source is arranged towards the attenuating sheet, the attenuating sheet can make the light intensity of light passing through the attenuating sheet fixed proportion attenuation.Quality control card system includes multiple fluorescent electronic quality control cards, the light source of each fluorescent electronic quality control card is same, the optical density of the attenuating sheet of each fluorescent electronic quality control card is different from each other.Compared with prior art, quality control card system provided by the utility model emits same light by same light source, after attenuation by different attenuating sheets, different fixed light intensity signals are formed respectively, cover the detection range of dry immunization analyzer, can be used for the accurate calibration of equipment, reduce the measurement error between different equipment, improve the stability and reliability of detection result.

The present invention relates to a glass-ceramic material for coating a glass or glass-ceramic pane and to the pane coated with the material. The pane has high optical density, a high breaking strength and a high bending strength.

A light-shielding film wherein front and back thereof can be distinguished visually. A glossiness degree against a light having an incident angle of 60° is (A), reflectance against a light having a wavelength of 550 nm is (B) and an L value in CIELAB color space system by the SCE method is (C). A light-shielding film is for obtaining a light-shielding member includes at least a first and a second light-shielding layer in which an outermost surface of each of the layers have the (A), (B) and (C) of 2% or less, 4.5% or less and 26 or less, respectively. Between the outermost surface of the first light-shielding layer and the outermost surface of the second light-shielding layer, a difference of (C) is 4 or more and a difference of optical densities are 0.5 or more and 1.5 or less.

A printing apparatus includes: a printing unit configured to eject a color material ink and a reaction liquid; a controller configured to control the printing unit such that the printing unit prints a first test pattern in which a plurality of patches are arranged; a first obtaining unit configured to obtain an optical density for each of the plurality of patches; a second obtaining unit configured to obtain a specular reflection intensity for each of the plurality of patches; and a first generation unit configured to generate correction information based on the optical density obtained by the first obtaining unit, the specular reflection intensity obtained by the second obtaining unit, a first target value of the optical density for a first input value of the color material ink, and a second target value of the specular reflection intensity for a second input value of the reaction liquid.

The present invention provides an optical element that enables a gas sensor with high tolerance to fluctuations while increasing the effective light-receiving or light-emitting surface area without increasing the chip size. [Solution] The optical element has an internal wiring section (30) that electrically connects a first contact electrode section (24) of one unit element and a second contact electrode section (25) of another unit element, and a second region (212), an active layer (22), and a second conductivity semiconductor layer (23) that constitute a mesa structure, and a pad electrode (40) that is arranged to cover a plurality of unit elements (20) and electrically connected to at least one of the first contact electrode section (24) and the second contact electrode section (25), and a first insulating section (50) that is arranged between the pad electrode (40) and the side surface of the mesa structure and the first region (211) of the first conductivity semiconductor layer (21), and the diameter of the circle that circumscribes the region in contact with the pad electrode and the connection section is 15% or more of the length of the short side of the substrate.

The application relates to the technical field of medical image database, and discloses a standardized cervical cancer pathological image database construction method, which comprises the following steps: step 1, specimen number is hashed to obtain pseudo-anonymous specimen number, unique slice identification and cell-level unique identification are generated; step 2, a unified reference system is established, the reference layer pixel spacing, the down-sampling multiple and the coordinate mapping are determined; step 3, the image is converted into an optical density space and normalized according to a target staining base to obtain a standardized image; step 4, cross-modal anchor point lists are established by manually comparing cytological and histological images; step 5, a hierarchical label set is generated by synthesizing multi-level unique labels according to the severity full sequence; step 6, the intersection-over-union index and the kappa consistency value are calculated according to the combination key, and a review to-do list is generated; step 7, point review and rule revision are carried out, and a data dictionary, a consistency report and an anchor point snapshot are output. The application realizes the standardized database construction and traceable quality control of cervical cancer cytological and histological pathological images.

The invention relates to the technical field of semiconductors, and discloses a chromium coating for a photomask substrate, a preparation method of the chromium coating, a photomask and a semiconductor element, the chromium coating is a pure chromium coating and has a single microstructure or a composite microstructure; wherein the single microstructure comprises any one of an amorphous state, a polycrystalline state and an amorphous-nanocrystalline mixed state; the composite microstructure comprises at least two of an amorphous state, a polycrystalline state and a mixed state; and the mixed state is a transition state microstructure of amorphous polycrystalline transformation. By regulating and controlling the microstructure of the pure chromium target, the chromium coating for the photomask substrate can meet the design target of optical density of unit thickness at the wavelength of 193nm under the condition of ultra-thin thickness, so that the three-dimensional mask effect caused by a thick chromium layer is avoided, and the contradiction of insufficient shading of the thin chromium layer is solved. Meanwhile, the mode based on the pure chromium material assisted by magnetron sputtering current regulation and control does not need a complex reaction gas system, the process window is wide, the reproducibility is good, and the method is suitable for industrial batch production.

The application provides a light-shielding flexible copper-clad plate, a preparation method and application thereof. The light-shielding flexible copper-clad plate comprises a copper foil layer and a polyimide film layer, and further comprises a light-shielding adhesive layer arranged between the copper foil layer and the polyimide film layer. The light-shielding adhesive layer comprises a composite light-shielding filler, the composite light-shielding filler comprises modified flaky light-shielding pigment, carbon black and auxiliary filler, and the weight ratio of the modified flaky light-shielding pigment, the carbon black and the auxiliary filler is (3-6):(2-5):(1-3). The modified flaky light-shielding pigment comprises flaky light-shielding pigment and an inorganic oxide layer coated on the surface of the flaky light-shielding pigment. Based on a ternary composite light-shielding system, the combination of black pigment with a flaky structure and nanoscale carbon black is adopted, and the auxiliary filler is supplemented, so that a multi-dimensional light-shielding network is constructed, thereby realizing high optical density under a lower filler content and ensuring excellent light-shielding effect.

The present invention relates to a glass-ceramic material for coating a glass or glass-ceramic disc and to the disc coated with the material. It has high optical density, high fracture strength, and high flexural strength.

The present invention relates to a heat-sensitive recording material comprising: a support substrate having a first side and a second side facing away from the first side; and a heat-sensitive color-forming layer arranged on the first side of the support substrate, wherein the heat-sensitive color-forming layer comprises at least one color former, at least one color developer, and at least one stabilizer; wherein the at least one stabilizer is selected as a compound of formula (1), Ar 1 -SO2-NH-C6H4-SO2-C6H4-NH-CO-NH-Ar 2 , where Ar 1 and Ar 2 independently of each other are an unsubstituted or substituted phenyl residue, and / or wherein at least one stabilizer is selected as a compound of formula (2), Ar 1 -NH-CO-NH-C6H4-SO2-O-C6H4-NH-CO-NH-Ar 2 , where Ar 1 and Ar 2independently of one another are an unsubstituted or substituted phenyl, naphthyl and / or heteroaryl residue; wherein the weight ratio of stabilizer to color developer in the heat-sensitive color-forming layer is selected such that, according to stability test 1 defined in the description, after a storage period of 7 days under dry storage conditions, the remaining optical density of the heat-sensitive color-forming layer is at least 85% of the original optical density of the heat-sensitive color-forming layer before storage, and / or that, according to stability test 2 defined in the description, after a storage period of 7 days under humid storage conditions, the remaining optical density of the heat-sensitive color-forming layer is at least 80% of the original optical density of the heat-sensitive color-forming layer before storage;and / or that, according to the stability test 3 defined in the description, after a storage period of 7 days, the remaining optical density of the heat-sensitive color-forming layer is at least 70% of the original optical density of the heat-sensitive color-forming layer before storage.

An integral optical construction includes an optical film, a lens layer disposed on a first side of the optical film and having microlenses arranged two-dimensionally across the lens layer, and an optically opaque mask layer on a second side of the optical film defining a plurality of through openings. The openings have a one-to-one correspondence with the microlenses, such that, for a collimated incident light, for at least one polarization state, and for at least one of a blue wavelength range, a green wavelength range, and a red wavelength range, the optical film has an average transmittance T1 for an incident angle less than 10 degrees and an average transmittance T2 for an incident angle greater than 35 degrees, such that T1 / T2≥1.5, and regions of the mask layer between openings have an average optical density of greater than about 2 in the blue, green, and red wavelength ranges.

An automotive decorative panel includes a decorative film, a touch icon component, and a light source system. The decorative film has an optical density between 0.2 and 2.0 and includes a substrate and a decorative layer disposed on the substrate. The touch icon component is disposed under the decorative film and includes a light-shielding pattern layer having an optical density between 3.5 and 6.0, a light diffusion layer disposed under the light-shielding pattern layer, and a touch layer. The light-shielding pattern layer has a pattern area that is light-permeable and a peripheral area that is light-impermeable. The touch layer is disposed on a side of the light-shielding pattern layer or between the decorative film and the light-shielding pattern layer. The light source system is disposed on a side of the touch icon component and configured to emit light toward the touch icon component.

The application discloses a macular pigment optical density analysis method and system based on multispectral imaging and deep learning and a storage medium. The method comprises the following steps: collecting multispectral fundus images of a human eye retina under narrow-band wavelengths and performing registration; automatically segmenting a macular region and a foveal region by using a pre-trained deep learning segmentation model; extracting multispectral features from the segmented region; inputting the features into a deep regression model with physical information constraints to output the macular pigment optical density values of each position; and finally generating an MPOD spatial distribution map and performing visualization. The application innovatively introduces a physical information constraint neural network, integrates the Beer-Lambert law as a physical loss term into model training, significantly improves the accuracy, robustness, interpretability and device independence of MPOD quantification, overcomes the technical defects of existing subjective methods and traditional optical imaging methods, and can provide a powerful tool for ophthalmic disease screening and monitoring.

An optical construction includes a lens film having outermost first and second major surfaces. The first major surface includes a plurality of microlenses. A multilayer mask having an average thickness of less than about 0.5 times an average focal length of the microlenses and an optical density of greater than about 2 is disposed on the second major surface. The multilayer mask includes polymeric first and second mask layers where each of the first and second mask layers has an optical density of greater than about 0.3. The multilayer mask defines a plurality of laser-ablated through openings therein that are aligned to the microlenses in a one-to-one correspondence. An optical transmittance of the optical construction as a function of the incident angle has a transmitted peak having a peak transmittance T1 and a corresponding full width at 20 percent of maximum W1, where T1 / W1≥2.4% / degree.

The embodiment of the specification provides a blood vessel blood oxygen saturation calculation method based on a multispectral fundus image. The method introduces blood vessel skeleton extraction and blood vessel topology graph construction, and realizes fine description of the blood vessel structure. Based on the blood vessel topology graph, the blood vessel radius is adaptively calculated, the positioning accuracy of the blood vessel is improved, and a more accurate pixel value basis is provided for subsequent blood vessel inside and outside pixel value calculation. The method introduces a light intensity ratio compensation mechanism. In the 548nm optical density calculation, the 605nm blood vessel outside pixel value is converted into equivalent 548nm incident light intensity through the pre-calibrated light intensity ratio, the difference in reflection characteristics of different wavelengths of the tissue is eliminated, the accuracy of the optical density calculation result is improved, and the accuracy of the blood oxygen saturation calculation result is improved.

An optical construction includes a lens film having an outermost first major surface and a second major surface. The first major surface includes a plurality of microlenses. A multilayer mask having an average thickness less than about 0.5 times an average focal length of the microlenses and having an optical density greater than about 2 is disposed on the second major surface. The multilayer mask includes first and second mask layers of a polymer, where each of the first and second mask layers has an optical density greater than about 0.3. The multilayer mask defines a plurality of laser-ablated through openings therein in a one-to-one correspondence with the microlenses. An optical transmittance of the optical construction as a function of angle of incidence has a transmittance peak having a peak transmittance T1 and a corresponding 20% extreme full-width W1, where T1 / W1 ≥ 2.4% / degree.

The present application relates to the technical field of near-infrared brain function imaging enhancement, in particular to a data classification method for near-infrared brain function imaging based on deep learning. The method acquires brain blood oxygen data through fNIRS and obtains an activation distribution map of a task; according to the position and optical density change value of the light source detector under each task, the emission signal intensity data of the light source emitter, the overall scattering interference degree of each light source detector under each task is obtained, and then the reference interference value of each pixel point in the activation distribution map is determined, the filter weight of each pixel point in the pixel point convolution kernel is corrected to obtain the corrected filter weight, and then the optimized activation distribution map is obtained, the near-infrared brain function imaging data classification model is trained, and the data classification of near-infrared brain function imaging is realized. The present application accurately obtains the corrected filter weight, accurately filters the activation distribution map, and effectively improves the accuracy of the near-infrared brain function imaging data classification.

An AI image processing system is provided. The system is configured to receive latent parameters defining representations of attributes of an object in an image. The latent parameters include subsets of latent parameters, and each latent parameter subset corresponds to one attribute. The system is configured to produce a joint encoding of the latent parameters and produce an implicit 3D model of the object based on the joint encoding. The implicit 3D model defines a volumetric representation for each 3D location in the scene with respect to an input viewing direction. The volumetric representation defines a signed distance value and / or an optical density, and a color and / or a feature vector. The system is configured to render a 2D image of the scene including the object viewed from the input viewing direction based on the produced volumetric representations for different 3D locations in the scene.