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613 results about "Object distance" patented technology

Object-film distance. About. Object-film distance (OFD) is the distance between the object (i.e. patient, phantom) and the film; the shorter the distance the sharper the image and the less the magnification.

Wiring terminal full appearance detection system and method based on annular track platform

The invention discloses a wiring terminal full appearance detection system and method based on an annular track platform, and the system comprises a track which is provided with a transparent material conveying chain plate segment and is used for the uniform motion transmission of a wiring terminal; the multi-station visual detection device comprises a plurality of visual camera groups and an object distance adjusting assembly, the plurality of visual camera groups are respectively arranged at different stations of the track and are used for carrying out image acquisition on six front-view main surfaces and a set surface of the wiring terminal, and the object distance adjusting assembly is connected with the visual camera groups and is used for carrying out image acquisition on the set surface of the wiring terminal. The object distance adjusting assembly is used for adjusting the object distance or / and the position of the linear scanning camera; the AI visual inspection module comprises an image marking unit used for carrying out defect classification and marking on the collected images; the model training unit is used for carrying out iterative training on the marked image based on a small sample learning algorithm to generate a multi-station detection model; and the real-time detection unit is used for deploying a multi-station detection model to execute component statistics, defect detection and defective product rejection.
Owner:杭州映图智能科技有限公司

Correlation light measuring device based on inclined plane mirror and control method

The invention relates to a related light measuring device based on a bevel mirror and a control method, and solves the problem that the existing three-dimensional detection technology is insufficient in comprehensive adaptability and cannot meet the requirements of precision detection for stability, precision and data collaboration, and the related light measuring device comprises a laser emission head, a double-bevel mirror, a light path receiving module, a zoom camera and a circuit processing unit. The first bevel mirror is provided with a through hole for laser to directly irradiate a target; the light path receiving module receives and reflects the laser-to-electric signal; the second bevel mirror reflects the target and the light spot light to the camera to obtain visual information; and the circuit processing unit controls all the components, integrates laser and visual information, and realizes three-dimensional detection of the target. The method has the following effects: through the light path collaborative design of the double-bevel mirror, precise and synchronous acquisition of laser ranging signals and visual contour / light spot information is realized, so that high-precision three-dimensional detection of the distance, the flatness and the segment difference of a target object is efficiently completed.
Owner:NINGBO WANDE HI TECH INTELLIGENT TECH CO LTD

Automatic focusing method, electronic device, and readable storage medium

PCT designated stageWO2025261246A1Imaging equipmentElectric devices
The present invention provides an automatic focusing method, an electronic device, and a readable storage medium. The automatic focusing method comprises: using a target detection model to detect a target object in an image frame acquired at an initial focal length by an optical imaging device to be focused, so as to acquire a target object detection result; on the basis of the target object detection result, determining whether a target object is present in the image frame; if yes, determining an actual object distance on the basis of the target object detection result and the initial focal length, and on the basis of the actual object distance and a mapping relationship between the object distance and an optimal imaging focal length, determining the optimal imaging focal length; and if not, using a preset search algorithm to search for a focal length until an image having the highest definition value is found, and using a focal length corresponding to the image having the highest definition value as the optimal imaging focal length. The present invention primarily employs a deep learning-based automatic focusing method, supplemented by an image definition evaluation method. Compared with traditional passive focusing methods, the present invention greatly improves the focusing efficiency. Compared with traditional active focusing methods, the present invention eliminates a need for adding an additional optical ranging component, ensuring that the imaging device has a simple structure and a low cost.
Owner:MICROPORT UROCARE(SHANGHAI) CO LTD

Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system

A variable magnification optical system comprising a first lens group, a second lens group, a third lens group, and a rear group in order from object side is configured so that at varying magnification the distances between adjacent lens groups are varied; at a predetermined object distance the variable magnification optical system has focused states with different amounts of aberration; the rear group includes a first focusing lens group and a second focusing lens group disposed closer to an image side than the first focusing lens group, the first and second focusing lens groups moving along different trajectories at focusing; at the object distance the first and second focusing lens groups move at transition from a first focused state to a second focused state; and the following conditional expression is satisfied:−6.80<f1 / f2<−0.05where f1 and f2 are the focal lengths of the first and second lens groups, respectively.
Owner:NIKON CORP

Teleoperation robot auxiliary control method based on safety margin theory

The invention relates to the technical field of teleoperation, in particular to a teleoperation robot auxiliary control method based on a safety margin theory. The method comprises the following steps: establishing a three-dimensional digital twinborn model according to an image acquisition device, and obtaining a target object distance, a communication time delay size and a motion tracking error; based on the three factors, a fuzzy control theory is adopted to calculate a teleoperation safety margin value, and the safety of the current teleoperation is quantitatively evaluated. And calculating a master-slave motion mapping ratio and an end view display ratio according to the safety margin value. And constructing virtual force guidance according to the safety margin value, feeding back the virtual force guidance to an operator through force feedback equipment, and guiding the operator to complete a teleoperation task in combination with visual interaction equipment. Compared with a traditional teleoperation method, the method can effectively improve teleoperation efficiency and safety, and can better adapt to a complex long-distance working environment.
Owner:BEIJING UNIV OF POSTS & TELECOMM +1

Real-time automatic focusing hyperspectral acquisition method and device

The invention discloses a real-time automatic focusing hyperspectral acquisition method and a real-time automatic focusing hyperspectral acquisition device. The real-time automatic focusing hyperspectral acquisition method comprises the following steps: step 1, acquiring dark background pixel signals; 2, automatic focusing is carried out; 3, repeating the step 2 until the requirement is met, recording automatic focusing data, and performing spectrum acquisition to obtain original spectrum data; step 4, calculating a full-width object distance matrix of the original spectral data based on the phase difference finally obtained in the step 3; 5, correcting the original spectral data based on the full-width object distance matrix to obtain corrected spectral data; and step 6, calculating the corrected reference plate spectral data based on the corrected spectral data and the dark background pixel signal, calculating the reflectivity of the target object to be measured, and realizing real-time automatic focusing hyperspectral acquisition. The method innovates a phase difference analysis method, and efficiently processes light change and target offset in a dynamic scene; the combination of the two improves the focusing precision and stability, effectively solves the problem that the scanning target in the dynamic scene is liable to defocus, and achieves the efficient adaptation of the dynamic scene.
Owner:HANGZHOU HYPERSPECTRAL IMAGING TECH CO LTD

Reading and writing table device with defocused periphery and unshielded visual field

The read-write table device comprises a shell, a spectroscope, an eyepiece and an object distance adjusting panel, the shell is of a closed frame structure with an opening in the front side wall, the eyepiece is embedded in the rear side wall of the shell, and the eyepiece comprises a concave mirror and a retroreflection lens tightly surrounding the peripheral side of the concave mirror; a spectroscope is obliquely arranged in the shell between the opening of the shell and the eyepiece, an object distance adjusting panel is embedded in the lower side wall of the shell, and the size of the object distance adjusting panel is matched with that of the retroreflection lens, so that the middle area of a picture seen by human eyes through the read-write table device is a virtual image, the peripheral area is a real image, and the myopia prevention and control effect can be achieved. The included angle between the side wall of the shell and the eyepiece meets a certain relational expression, so that the included angle between the side wall of the shell and the eyepiece can be determined according to the emergent angle of the edge light, the viewing effect that the visual field is not shielded by the shell is achieved, and the use experience and the visual effect are improved.
Owner:BAIHE OPTOELECTRONICS (BEIJING) CO LTD

Read-write table for realizing peripheral myopia type defocus

The invention relates to a read-write table for realizing peripheral myopia type defocus, which comprises a totally-closed hollow rectangular shell, a spectroscope, a concave mirror, a retroreflection multi-structure combined mirror and an object distance matching light-transmitting panel, and is characterized in that the spectroscope is obliquely arranged in the middle of the shell, the concave mirror is embedded into the rear side wall of the shell, and the front side wall of the shell corresponding to the concave mirror is open; a retroreflection multi-structure combined mirror is embedded into the upper side wall of the shell, the retroreflection multi-structure combined mirror comprises a central hollow area I and a combined mirror area I, and the combined mirror area I comprises retroreflection lenses and concave lenses which are alternately arranged from inside to outside; an object distance matching light-transmitting panel is embedded into the lower side wall of the shell, the object distance matching light-transmitting panel comprises a second central hollow area and a second combined lens area, and the second combined lens area comprises convex lenses and plane lenses which are alternately arranged from inside to outside; according to the invention, the middle area of a picture seen by the human eyes through the read-write table is a virtual image, and virtual images and real images in the peripheral area are alternately distributed, so that the myopia prevention and control effect is realized, and the visual continuity and definition are ensured.
Owner:BAIHE OPTOELECTRONICS (BEIJING) CO LTD

High-precision detection device and method for liquid meniscus contour in capillary tube

The invention belongs to the field of image spectrum detection, and particularly relates to a high-precision detection device and method for a liquid meniscus contour in a capillary tube. Comprising a telecentric lens, an industrial camera, a displacement platform, a light source, a capillary tube and a culture dish, the industrial camera, the capillary tube and the culture dish are installed on different displacement platforms respectively, the light source is provided with a rotary telescopic rod and can move in all directions, when the liquid meniscus contour in the capillary tube is shot, the light source, the meniscus of the capillary tube and the industrial camera are adjusted to be aligned to the same horizontal plane, and on the basis of the telecentric imaging principle, according to the light refraction principle, the liquid meniscus contour in the capillary tube is obtained. And deriving a distortion correction function of the meniscus contour in the capillary tube. According to the invention, the industrial camera and the telecentric lens are matched for use, the problem of shape distortion caused by object distance change is avoided, and the difficulty of image distortion correction is reduced. The meniscus contour distortion correction function derived based on the telecentric imaging principle can accurately calculate the actual value of the meniscus contour and restore the actual meniscus contour.
Owner:CHINA UNIV OF MINING & TECH

Dual-light registration and infrared camera calibration method

The invention discloses a dual-light registration and infrared camera calibration method, which comprises the following steps of: synchronously acquiring a visible light image and an infrared image, and acquiring multiple groups of dual-light image pairs under different distances within a preset object distance range; cross-modal feature key points are extracted, a matching corresponding relation is established, registration parameters under object distances are generated, and a dynamic compensation database is constructed; lead arrays are embedded in a plurality of horizontal edges and a plurality of vertical edges of a traditional checkerboard calibration plate, and leads are driven to generate uniform heat radiation; checkerboard corner coordinates are accurately extracted based on developed heating side lines in the infrared image, a real-time target detection model software deep learning model is utilized to construct a multi-scale feature fusion network, and combined geometric fitting is carried out on checkerboards in the bimodal image; and carrying out adaptive region segmentation on the fitted checkerboard, and reconstructing a black and white alternate state of the visible light checkerboard. The technical problem of registration failure in a complex environment can be solved, and the stability and repeatability of calibration are improved.
Owner:HEBEI UNIV OF ENG

Tunnel crack image identification method and tunnel wall uniform image detection system

The invention relates to the technical field of tunnel crack detection, and discloses a tunnel crack image identification method and a tunnel wall uniform image detection system. The method comprises the steps that tunnel images are collected, images belonging to cracks are calibrated to form an image set, and a crack target sample library is constructed; performing target detection identification on the collected tunnel image set, optimizing a target identification method according to an identification result, and outputting multiple tunnel crack disease detection images; extracting crack features from the collected tunnel image set; and based on the multiple tunnel crack disease detection images, performing pixel-level segmentation on the tunnel crack disease to complete tunnel crack identification. According to the invention, the traditional layout is broken, the requirements of closer shooting object distance and depth of field are met, and the detection requirement of smaller width of the welding seam is met; according to the algorithm level, a front image preprocessing part of deep learning training is optimized, especially contrast enhancement, multi-level fusion and the like are added, and the recognition accuracy of a tiny target can be further improved.
Owner:CHENGDU SHENGKAI CO LTD

Multi-object-distance low-distortion lens and camera device for machine vision

According to the multi-object-distance and low-distortion lens for machine vision and the camera device, the lens comprises an optical system, the optical system comprises a first lens group, an aperture diaphragm and a second lens group, the first lens group comprises a first lens, a second lens and a third lens, and the second lens comprises a second lens and a third lens. The second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are arranged on the same optical axis from the object space to the image space; the first lens is a biconvex lens with positive focal power, the second lens is a biconvex lens with positive focal power, the third lens is a biconcave lens with negative focal power, the fourth lens is a biconvex lens with positive focal power, the fifth lens is a biconcave lens with negative focal power, the sixth lens is a meniscus lens with negative focal power, and the seventh lens is a meniscus lens with positive focal power. And the eighth lens is a biconvex lens with positive focal power. The lens provided by the invention has the advantages of large object distance range, low distortion and high resolution.
Owner:AZURE PHOTONICS

Dynamic tumor tracking method and device, computer equipment and storage medium

The invention relates to a dynamic tumor tracking method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring 4DCT image data of a patient, and performing mixed data enhancement on the 4DCT image data to generate a 3DCT image representing each respiratory stage of the lung; based on the 3D CT image, generating an X-ray image in a respiratory cycle of a simulated patient by adopting a mathematical simulation method; registering the X-ray image and the 4DCT image data to generate a tumor tracking model of the patient; and inputting an X-ray image of a patient in a radiotherapy process into the tumor tracking model, and outputting a tumor tracking result through the tumor tracking model. According to the invention, real-time three-dimensional tracking of the tumor can be realized by using a single low-dose X-ray image under any geometric condition, high-precision tumor positioning can be provided on the premise of ensuring low radiation dose, the method is suitable for any projection angle and source-object distance change conditions, and various geometric relationship changes in the treatment process can be flexibly coped with.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI

Multi-object-distance, low-distortion and high-definition machine vision lens and camera device

ActiveCN119414572AReduce overall chromatic aberrationreduce aberrationOptical elementsLow distortionMachine vision
According to the multi-object-distance, low-distortion and high-definition machine vision lens and the camera device provided by the invention, the lens comprises an optical system, and the optical system comprises a first lens group, an aperture diaphragm and a second lens group which are arranged on the same optical axis from an object space to an image space; the first lens group comprises a first lens, a second lens, a third lens and a fourth lens which are arranged on the same optical axis from the object side to the image side, and the second lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are arranged on the same optical axis from the object side to the image side. According to the invention, the imaging effects of high image quality, high accuracy and low distortion can be presented under the condition of satisfying multiple object distances.
Owner:AZURE PHOTONICS

Industrial lens

The utility model relates to an industrial lens, which sequentially comprises a first lens group with positive focal power, a second lens group with negative focal power and a third lens group with positive focal power along an optical axis from an object side to an image side, the first lens group and the third lens group are fixed lens groups, and the second lens group is a focusing group; the first lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with positive focal power; the second lens group comprises a sixth lens with positive focal power and a seventh lens with negative focal power; the third lens group comprises an eighth lens and a ninth lens which are opposite in focal power, a tenth lens with positive focal power and an eleventh lens with negative focal power. The industrial lens provided by the utility model has at least one of the characteristics of low distortion, high illumination, high resolution, wide focusing object distance range, no virtual focus in a temperature range from-40 DEG C to 80 DEG C, and the like.
Owner:SUNNY OPTICS(ZHONGSHAN) CO LTD

Telephoto lens, camera module and electronic equipment

A telephoto lens (1), a camera module (10) and an electronic device (100). And when the telephoto lens (1) is focused at a distant view, the field angle FOV of the telephoto lens (1) is less than 60 degrees. The telephoto lens (1) includes a first lens group (G1) and a second lens group (G2) arranged from an object side to an image side, the first lens group (G1) having a positive refractive power, the second lens group (G2) having a negative refractive power, and a distance between the first lens group (G1) and the second lens group (G2) varies during a focusing process in which the telephoto lens (1) is switched between a distant view and a close view. The telephoto lens (1) not only can realize long-range shooting and high imaging quality, but also can have relatively strong close-range shooting capability, so that wide object distance imaging from long-range shooting to close-range shooting is realized.
Owner:HUAWEI TECH CO LTD

VR glasses tester

The utility model discloses a VR glasses tester, which comprises a cavity and a rectilinear motion control assembly arranged in the cavity, and is also provided with a lens assembly I, a reflector, a lens assembly II and a shooting camera in sequence, the lens assembly II can linearly move along an optical axis through the rectilinear motion control assembly, one end of the lens assembly faces an object to be tested, and the other end of the lens assembly faces the camera. One end of the second lens assembly faces the shooting camera, light transmitted out of the first lens assembly enters the second lens assembly after being refracted by the reflecting mirror, the second lens assembly is driven by the linear motion control assembly to move to change the simulant distance, and the effect of changing the simulant distance is achieved. According to the optical system, display states of different actual distances can be simulated within a very small distance, the size of the device is greatly reduced, the optical system has a large field angle of 70 degrees, and the problem that an existing device is small in field angle is solved.
Owner:ZHONGSHAN UVATA OPTICAL

Imaging systems and methods for dimension measurement independent of laser alignment

Disclosed are imaging systems and methods for dimension measurement independent of laser alignment. An example method includes: obtaining an image of the object captured underwater using an underwater imaging system comprising a camera and a laser source, wherein the image includes a representation of the object and a laser spot incident on the object; identifying, in the image, at least two points of interest on the object; determining an image-space distance between the at least two points as represented in the image; determining a location of the laser spot within the image; estimating a camera-to-object distance based on the location of the laser spot within the image and a calibrated spatial relationship between the camera and the laser source; and estimating the physical dimension of the object based on the image-space distance using the camera-to-object distance.
Owner:RGT UNIV OF CALIFORNIA

Movement lens motor out-of-step processing method and device, electronic equipment and storage medium

PendingCN119450209Amaintain claritykeep smoothInformation controlOphthalmology
The invention discloses a movement lens motor out-of-step processing method and device, electronic equipment and a storage medium. The method comprises the following steps: controlling a movement lens to zoom according to the position of a reference zoom motor under the current object distance; detecting an actual zoom motor position when the zoom of the movement lens is completed to trigger automatic focusing and enable a lens picture to meet the target focusing definition, wherein the actual zoom motor position is determined based on a field angle of the lens picture when the movement lens meets the target focusing definition; determining out-of-step state information of the zoom motor of the movement lens according to the actual zoom motor position and the reference zoom motor position; and controlling the zoom motor of the movement lens to perform out-of-step compensation according to the out-of-step state information of the zoom motor of the movement lens. According to the scheme, the problem that whether the movement lens is out of step or not cannot be rapidly detected and compensated can be solved on the premise that the definition and smoothness of a lens picture are kept and the user experience is not influenced.
Owner:ZHEJIANG UNIVIEW TECH CO LTD

Spore microscopic imaging automatic focusing method and system based on target recognition algorithm

The invention discloses a spore microscopic imaging automatic focusing method and system based on a target recognition algorithm, and the method comprises the steps: analyzing the image focusing effect of spore images collected under different object distances in the process of changing the object distance of a microscope, and determining the optimal positive focus object distance based on the object distance corresponding to the spore image with the optimal image focusing effect; the image focusing effect is cooperatively determined based on the number of spores which can be recognized by using a target recognition algorithm in the image and a focusing evaluation value obtained by analyzing the image by using a focusing evaluation function; the image focusing effects of different images are preferentially determined according to the number of the spores which can be recognized; and when the number of the spores is consistent and the image focusing effect difference cannot be determined, further determining the image focusing effects of different images based on the focusing evaluation values of the images. According to the method, the problem of focal plane misjudgment caused by complicated background interference of micro-particle impurities such as pollen and dust in a spore microscopic image is solved.
Owner:HEFEI ANJI YUNTONG TECHNOLOGY CO LTD +1

Ultraviolet visible light confocal object image double telecentric imaging optical system

The invention relates to the field of industrial visual inspection, and discloses an ultraviolet visible light confocal object image double telecentric imaging optical system which comprises a first lens, a second lens, a first gluing piece, a diaphragm, a second gluing piece, a third lens and a fourth lens which are sequentially arranged from an object plane to an image plane, and an optical axis serves as a rotation center. Wherein the object surface of the first lens is a convex spherical surface, the curvature radius of the first lens is 110.02 mm, the image surface of the first lens is a concave spherical surface, and the curvature radius of the first lens is 65.59 mm; the object surface of the second lens is a concave spherical surface, the curvature radius of the second lens is-200.11 mm, the image surface of the second lens is a convex spherical surface, and the curvature radius of the second lens is-130.80 mm. The system can be suitable for measuring an object with the object distance of 110 mm and an industrial camera with the imaging image surface diameter of 11 mm or below, the aperture of the system is F / 8, the system is also suitable for ultraviolet and visible light environments, it is ensured that lossless and high-contrast imaging can still be achieved in different light source environments, and therefore high-precision and high-reliability surface defect recognition and classification tasks are supported.
Owner:KUNSHAN DINGSIFU AUTOMATION TECH CO LTD

Shipborne water cannon platform adjusting method and device based on jet deviation prediction and ship attitude prediction

The invention provides a shipborne water cannon platform adjustment method and device based on jet deviation prediction and ship attitude prediction, and relates to the technical field of water cannon platform adjustments, the method comprises the following steps: obtaining a real-time video frame image, a real-time brightness value, a real-time wave height, a real-time wave frequency, real-time air humidity and real-time visibility; establishing an image segmentation model in which the brightness value, the wave height, the wave frequency, the air humidity and the visibility are introduced, and inputting the real-time data into the image segmentation model to segment a water column image, a striking drop point image and a target image to be struck; and determining a real object distance deviation and iteratively adjusting a yaw angle and a pitch angle of the water cannon platform until the target is completely hit. According to the method, during image segmentation, the image segmentation model in which the brightness value, the wave height, the wave frequency, the air humidity and the visibility are introduced is used for segmenting the image, the influence of external environment factors is fully considered, the segmented image is more accurate, and it is guaranteed that a follow-up water cannon platform is accurately adjusted to hit a target.
Owner:WUHAN UNIV OF SCI & TECH +3

Depth measurement method, camera calibration result evaluation method, equipment and storage medium

The invention discloses a depth measurement method, a camera calibration result evaluation method, equipment and a storage medium, and relates to the technical field of machine vision, and the method comprises the steps: obtaining an object distance and a collection image for a target feature point; calculating a sight line included angle according to the pixel coordinates of the target feature point in the acquired image; acquiring a principal point offset between the center and the optical center of the camera lens; and calculating depth information of the target feature point according to the triangle theorem in combination with the main point offset, the object distance and the sight line included angle. Therefore, the method can dynamically adapt to the spatial relationship between different feature points and the camera, corrects the measurement error caused by the fact that the attitude position of the feature point relative to the optical center is not considered in a traditional method, and improves the depth measurement precision of the camera.
Owner:SHENZHEN ZHUOJIAN INTELLIGENT MANUFACTURING CO LTD

System and Method for Estimating Object Distance And / or Angle From an Image Capture Device

A system and method for estimating object distance and / or angle from an image capture device may obtain an image including a fiducial marker captured by an image capture device; extract a pixel width and / or a pixel height of the fiducial marker in the image space of the image; determine, based on the pixel width and / or the pixel height, a known width and / or a known height, and one or more calibration parameters, a distance of the fiducial marker from the image capture device; estimate, based on the pixel width, the pixel height, the known width, and the known height, a yaw angle of the fiducial marker with respect to the image capture device; determine, based on a slope of a positional vector of the fiducial marker, a roll angle of the fiducial marker with respect to the image capture device; and / or provide the distance, the yaw angle, and / or the roll angle.
Owner:BECTON DICKINSON & CO

Optical waveguide combiner systems and methods

An optical display system has an optical waveguide combiner and one or more cameras. The one or more camera(s) is optically coupled to the optical waveguide combiner and have a field of view of at least one real object and at least one virtual object displayable by the optical display system. The one or more camera(s), which may be for example wafer level waveguide camera(s), may be disposed outside the usable field of view of an output coupler. The one or more camera(s) may be self-calibrated electronically using images captured by the cameras of one or more virtual object(s) displayable by the optical display system. AR / VR / MR registration of devices and / or displayed virtual objects with real objects may be implemented using the images captured by the one or more camera(s) of the displayed virtual objects and real world objects. Real object distance and / or spatial location relative to the optical waveguide combiners may be determined or estimated from the captured images.
Owner:SNAP INC

Target positioning method and system based on target height correction monocular distance measurement

The invention discloses a target positioning method and system based on target height correction monocular distance measurement, and the method comprises the steps: carrying out the calibration of a ship-borne camera through a data set, employing a YOLO target detection model, carrying out the detection of video data collected by the ship-borne camera, and obtaining the bounding box information of a target; and secondly, according to bounding box information, calculating a yaw angle of the target relative to a main point of the shipborne camera, and obtaining an azimuth angle by combining an orientation angle of the main point of the shipborne camera. And then height correction is carried out to measure the distance between the target ship and the shipborne camera. And finally, according to the azimuth angle and the distance, combining the latitude and longitude coordinates of the shipborne camera to obtain the actual geographic latitude and longitude coordinates of the target ship. According to the method, the goodness of fit between distance measurement and actual image geometry is improved, the actual object distance is reflected more accurately, and accurate and efficient target positioning is carried out.
Owner:HANGZHOU DIANZI UNIV

Microscopic imaging device and method with depth reconstruction effect

The invention discloses a microscopic imaging device and method with a depth reconstruction effect, and the method comprises the steps: carrying out the image collection of a to-be-detected object through an image collection part, and obtaining a first image and a second image of the to-be-detected object; according to inverse filters corresponding to a plurality of preset object distances of the first shooting component and the second shooting component and a transformation matrix between the first shooting component and the second shooting component under each object distance, obtaining an offset loss amount of any pixel point under the corresponding object distance; and the depth value of the pixel point is obtained according to the offset loss amount corresponding to all the object distances of any pixel point, so that depth reconstruction is completed, and an ultra-depth-of-field image and a depth map are obtained. By adding the specially designed phase mask sheet, the optical super depth-of-field effect is realized; multiple times of shooting or use of a displacement platform is not needed in the depth reconstruction process, the ultra-depth-of-field image and the depth image can be obtained only through one-time shooting of the double cameras, and the method is simpler, more efficient and easy to implement.
Owner:SHENZHEN HUAHAN WEIYE TECH

Endoscope working distance self-adaptive adjustable system, endoscope imaging system and application

The invention provides an endoscope working distance self-adaptive adjustable system, an endoscope imaging system and application. The endoscope working distance self-adaptive adjustable system comprises an image transmission lens sheath, a lens base, a protective lens sheath and a working distance auxiliary adjusting system arranged between the protective lens sheath and the lens base and / or arranged between the protective lens sheath and the image transmission lens sheath. The lens base protrudes in the axial direction to form a supporting part, and an imaging lens is arranged in the image transmitting lens sheath far away from the image side. The protective lens sheath comprises an outer sheath tube which axially extends out of the imaging lens, a sheath tube connecting part which partially sleeves the outer side of the supporting part and is connected with the outer sheath tube, and a protective lens which is arranged in the tail end of the object side of the outer sheath tube; the working distance auxiliary adjusting system is used for adjusting the relative axial position between the imaging lens and the protection lens and keeping the working distance between the protection lens and the imaging lens. By means of the working distance auxiliary adjusting system, the optimal object distance of the endoscope imaging system is achieved, and the microscopic imaging quality is ensured.
Owner:SHANGHAI DENDRITIC PRECISION INSTR CO LTD

Multi-scale scattered light field synchronous measurement method based on computational imaging

The invention relates to the technical field of optical measurement, in particular to a multi-scale scattering light field synchronous measurement method based on computational imaging, an overall measurement optical system comprises a hemispherical scattering dome, an aspheric reflector and a detection system, and the detection system comprises a detection optical assembly and a detector. Comprising the steps that multi-scale scattering light field information of a to-be-measured target body is collected, light field information interpretation processing is conducted on the collected multi-scale scattering light field information data, and an overall measurement optical system is a large-view-field and large-depth-of-field optical system for imaging of different object distances and belongs to an off-axis turn-back type optical system. A complex mechanical motion structure is replaced by an optical device, and synchronous'snapshot 'measurement of multi-scale scattered light fields on the surface of a to-be-measured target body without a motion mechanism is realized.
Owner:CHANGCHUN UNIV OF SCI & TECH