123 results about "Stereoscopic imaging" patented technology

The invention discloses a polarization spectrum modulation type multispectral stereo imaging method which solves the problem that in the prior art, an existing polarization spectrum imaging scheme does not achieve three-dimensional reconstruction of a target and achieves the purpose that the three-dimensional reconstruction of the target is not achieved under the condition that active illumination or special marks are not needed. Synchronous high-precision reconstruction of physical attributes and three-dimensional geometry of the surface of the target is realized; the method comprises the following steps: uniformly modulating polarization information and spectral information of incident light of a target through a three-way optical filter and a polaroid to obtain modulated incident light information; performing aliasing acquisition of a plurality of polarization spectrum components on the modulated incident light information through a multi-color detector combination to obtain aliasing light intensity; performing linear solution on the aliasing light intensity to obtain each polarization spectrum component vector, calculating the polarization degree and the polarization angle of each channel, and further deriving a surface zenith angle and an azimuth angle; reconstructing the three-dimensional morphology of each spectrum channel through normal gradient field frequency domain integration; and finally, fusing the multi-spectral three-dimensional data to obtain a multi-spectral three-dimensional imaging result.

Embodiments of the present disclosure relate to surface estimation using stereo imaging and surface disparities. For example, a surface disparity field representing a surface in the environment (e.g., the ground) may be estimated from stereo image data and used for various downstream tasks. For example, the difference between a stereo disparity field and a ground disparity field may be used to detect objects, a representation of a navigable space may be generated by radially casting 2D rays in the ground disparity field, the ground disparity field may be used to compensate ego-motion for high dynamic attitude changes, and / or the ground disparity field may be lifted to 3D and used to fit a surface profile to points sampled from the lifted point cloud.

The invention relates to a method for determining the position and / or orientation of tools of construction machines in a construction area, comprising the steps of: attaching at least one stereo camera to at least one construction machine or to a movable carrier, such that the stereo camera can detect at least one detection region within the construction area, preferably a working region of the construction machine, providing at least one reference point, the position of which is known relative to a predefined 3D world coordinate system and which can be recognised in the images of the stereo camera, in the detection region of the at least one stereo camera, calibrating the at least one stereo camera on the basis of the detection of the at least one reference point and triangulation in order to ascertain a transformation between the 3D world coordinate system and a 2D image coordinate system of the at least one stereo camera, preparing a virtual digital 3D terrain model of the construction area by means of digital image processing, in particular stereoscopy, and image recognition on the basis of the detection of the construction area by means of the at least one stereo camera, and representing predetermined working positions and detected actual tool positions and / or actual tool inclinations of the tool of the at least one construction machine in the virtual digital 3D terrain model.

A system for imaging an eye of a subject during a medical procedure includes: at least two image capture units for stereoscopic imaging of the eye of the subject configured to sense light at least in infrared (IR) and visible spectra, at least one IR light source, and at least one visible light source for illuminating the eye of the subject with light in the IR and visible spectra. The system is configured to output imagery data emanating from the at least two image capture units for displaying thereof. The system is configured to balance between visible and IR illumination from the visible and IR light sources by controlling their intensity.

The invention relates to the technical field of biomedical imaging, and discloses a photoacoustic-ultrasonic volume imaging method and system based on an annular ultrasonic array, and the method comprises the steps: reconstructing a two-dimensional photoacoustic image and a two-dimensional ultrasonic image; after photoacoustic imaging and ultrasonic synthetic aperture imaging of one imaging plane are completed, the annular ultrasonic array is moved in the direction perpendicular to the imaging plane, photoacoustic images and ultrasonic images of all the imaging planes are repeatedly executed on the next imaging plane, rebuilt and stacked, and a three-dimensional photoacoustic volume image and a three-dimensional ultrasonic volume image are formed; performing spatial pulse response deconvolution processing on the three-dimensional photoacoustic volume image; and fusing the processed three-dimensional photoacoustic volume image and the three-dimensional ultrasonic volume image to generate a three-dimensional bimodal volume image. According to the invention, high-time-resolution opto-acoustic-ultrasonic bimodal three-dimensional imaging is realized by using an annular ultrasonic array and motion scanning, and the high spatial resolution of the image is further ensured through a series of technologies.

Embodiments of the present disclosure relate to surface estimation using stereo imaging and surface disparities. For example, a three-dimensional (3D) surface structure may be modeled as a disparity field, and a surface disparity field representing a surface in the environment (e.g., the ground) may be generated using a constrained nonlinear hierarchical optimization to process stereo image data and iteratively refine estimated surface disparity values based on weights that guide the optimization to expected surface values (e.g., ground, road). The resulting surface (e.g., ground) disparity field may be used for a variety of downstream tasks, such as obstacle detection, segmentation of a navigable space, ego-motion refinement, and / or generation of an estimated surface profile.

A tomographic imaging system, methods to visualize tomographic images, and a ‎stereoscopic calibration procedure for obtaining two-dimensional cross-sectional ‎and three-dimensional volumetric images over the entire anterior eye. The optical ‎system combines stereoscopic imaging with patterned illumination (e.g., slit-‎scanning or array of slits). The captured cross-sectional images can be viewed ‎individually or as a fly-through video. The calibration and reconstruction methods ‎determine the true spatial location of imaged features and record a 3D volumetric ‎representation of the anterior eye. The system can image the entire anterior ‎chamber and contiguous structures, including the corneal limbus, sclera and ‎eyelids. Furthermore, the system can obtain corneal topography. ‎

Examples relate to a system, to a method and to a computer program for an optical imaging system, such as a microscope, and to an optical imaging system comprising such a system. The system is configured to obtain stereoscopic image data of a scene from a stereoscopic imaging device of the optical imaging system. The system is configured to determine depth information on at least a portion of the scene. The system is configured to determine a scaling factor of an information overlay to be overlaid over the stereoscopic image data based on the depth information. The system is configured to generate a stereoscopic composite view of the stereoscopic image data and the information overlay, with the information overlay being scaled according to the scaling factor. The system is configured to provide a display signal comprising the stereoscopic composite view to a stereoscopic display device.

This invention discloses a design method for a deep-sea in-situ fine-scale detection framework based on acoustic-optical remote sensing and VR technology. The main steps include: (1) studying the structure of the photon-counting lidar scanning system and the dynamic geometric relationship between the mother ship and the submersible, and constructing a calculation model for the lidar bathymetry point coordinates in the WGS84 spatial rectangular coordinate system; (2) considering the submersible's attitude, and based on the ray-tracking model and the geometric relationship between the mother ship and the submersible, constructing a calculation model for the multibeam bathymetry point coordinates in the WGS84 spatial rectangular coordinate system; (3) fusing the lidar and multibeam bathymetry points to construct a seabed topographic map; (4) proposing a development scheme and detection method for a deep-sea functional imaging spectrometer; and (5) constructing a VR environment for the deep-sea target survey area using a three-dimensional seabed topography model, rendering technology, and binocular stereo imaging technology. Through these steps, deep-sea in-situ fine-scale detection based on acoustic-optical remote sensing technology and the construction of a VR environment for the survey area can be achieved.

Systems and methods for calibrating a stereo imaging device are disclosed herein. An example implementation includes receiving, at a processor, a plurality of image pairs from a stereo imaging device, and for each image pair of the plurality of image pairs, computing a respective line delta value indicative of a deviation along a horizontal axis between a first image captured by a first sensor and a second image captured by a second sensor. The implementation also includes determining a median line delta value based on each respective line delta value and subsequently determining a respective set of disparities in one or more features in the first image and the second image based on the median line delta value. The method also includes computing a column delta value and calibrating the stereo imaging device using the median line delta value and the column delta value.

This disclosure provides a novel stereoscopic imaging technique that enables extremely large field-of-view data sets that can be displayed in stereo, such as over 270° horizontal and 180° vertical fields of view. Therefore, it is possible to record data that is larger than the user can visualize. In this way, the user can select which subset of the data set they wish to view. Head and eye tracking then provide a natural viewing experience for the user, allowing them to view and inspect the scene as if they were naturally present and viewing it in real time.

Light projection systems and methods may comprise combining light from two or more projectors. Each projector may be controlled so that the combined light output of the projectors matches a target for the projected light. In some embodiments optimization is performed to generate image data and control signals for each of the projectors. Embodiments may be applied in image projecting applications, lighting applications, and 3D stereoscopic imaging.

An intraoperative stereovision system has a stereo imager configured to provide stereo images at first and second time (iSV0, iSV(n)) to an image processor configured with a computerized mechanical model of a spinal column, the computerized mechanical model configured to model vertebrae as rigid, displaceable, bodies. The image processor is configured to extract an iSV0 surface model from iSV0 and an iSV(n) surface model from the iSV(n); to register these surfaces, and identify differences therefrom. The image processor is configured to adjust the computerized mechanical model according to the identified differences thereby causing the adjusted computerized mechanical model to track the iSV(n) surface model at each of multiple timepoints.

The invention relates to an imaging device (10; 110; 210), in particular an endoscope device, comprising a shaft (12; 112; 212) that defines a longitudinal axis (14; 114; 214), and comprising a stereoscopy unit (16; 116; 216) for stereoscopic image generation. It is proposed that the stereoscopy unit (16; 116; 216) comprises a movement unit (20; 120; 220) for a mechanically effected change to a selection region (22, 22'; 122, 122'; 222, 222') from a field of view (24; 124; 224) of the stereoscopy unit (16; 116; 216) for image capture, wherein the stereoscopy unit (16; 116; 216) is configured to define the selection region (22, 22'; 122, 122'; 222, 222') for image capture for use in stereoscopic image generation as a function of a rotation parameter with respect to the longitudinal axis (14; 114; 214). Fig. 2

The application discloses a non-blind area panoramic annular stereoscopic imaging lens, which comprises lenses L1, a panoramic annular lens L2 and a rear lens group G3 arranged in sequence along an optical path direction and arranged along an optical axis; the L2 comprises a front transmission surface R3 and a front reflection surface R4 on a subject side; and the L2 comprises a central transmission surface R5 and a polarization light splitting half-reflection half-transmission surface R6 on an image side; the L1, the L2 and the G3 form three channels; a field of view range of a front channel is 0~alpha, and light rays pass through the L1, the R3, the R5 and the G3 in sequence to reach an image plane; a field of view range of a panoramic channel is alpha~beta, and light rays pass through the R3, the R6, the R4, the R5 and the G3 in sequence to reach the image plane; a field of view range of a stereoscopic imaging channel is gamma~theta, and 0<gamma<theta<beta, light rays pass through the R3, the R6 and the G3 in sequence to reach the image plane to form a stereoscopic vision image. The application has no central blind area, has a large stereoscopic imaging field of view, can realize single-lens stereoscopic imaging in a visible light range and has a simple head structure.

The invention provides an electronic device, a display device and a stereo imaging method thereof. The electronic device comprises a display unit, an input unit, an artificial intelligence frame filling model, a detection unit and an imaging unit. The input unit is used for obtaining a first original image and a second original image. The first original image is shot at a first angle, and the second original image is shot at a second angle. The first angle is different from the second angle. The artificial intelligence frame filling model is used for generating a plurality of frames of intermediate generation images. The detection unit is used for detecting a viewing angle of a user relative to the display unit. The imaging unit is used for displaying one of the first original image, the plurality of intermediate generated images and the second original image on the display unit according to the viewing angle.

The invention provides a stereoscopic display method for a video conference and a video conference system. The stereoscopic display method of the video conference comprises the following steps. A first electronic device generates an image. The first electronic device encodes a hidden watermark into an image. The first electronic device transmits an image to a second electronic device. The second electronic device displays the image on a window of a display picture. The second electronic device searches a rectangular frame on the display picture; the second electronic device determines whether the hidden watermark is decoded in the rectangular frame. If the hidden watermark is decoded in the rectangular frame, the second electronic device performs stereo imaging on the content of the rectangular frame.

The application is suitable for the field of optical imaging technology, and provides a stereo imaging optical system for civil small unmanned aerial vehicle, which is composed of a spherical positive lens, two groups of double cemented spherical lenses, an aperture, a convex spherical mirror and a concave parabolic mirror, wherein the two groups of double cemented spherical lenses include a first double cemented spherical lens and a second double cemented spherical lens; the application can realize high-resolution imaging at multiple wavelengths, provide rich spectral information for users, and help to more accurately analyze and judge the target area. The compact design makes the system small in size and light in weight, and is very suitable for being mounted on low-altitude civil small unmanned aerial vehicle, thereby expanding the application range and operation ability of the civil unmanned aerial vehicle. The stereo imaging function can obtain three-dimensional information of the target area, and has important application value in the fields of geographic mapping and city planning, and can provide more comprehensive and accurate data compared with the traditional imaging mode.

A personal eyewear device comprises: a frame for supporting one or more lenses in front of a left eye and a right eye of a wearer when the personal eyewear device is worn by the wearer and an electronics module. The electronics module includes: a processor, a memory, a power source for powering the electronics module, and an eye tracking subsystem, wherein the processor and the memory are communicatively coupled with the eye tracking subsystem and wherein the eye tracking subsystem comprises: a first pair of imaging sensors forming a first stereo imaging sensor configured to capture images of a left eye of the wearer; and a second pair of imaging sensors forming a second stereo imaging sensor configured to capture images of a right eye of the wearer. The device further includes at least one additional sensor subsystem and a scheduling module.

Systems and methods for self-calibration of a stereo system without prior knowledge of the scene are disclosed herein. For example, a method for calibrating a stereo imaging system may comprise extracting a set of feature points from a first image captured from a first view of a stereo image and a second image captured from a second view and matching the set of feature points between the two images to form a list of matched points. The method may also comprise iteratively adjusting a tilt calibration value (Rx) and a roll calibration value (Rz) based on a y-dimension parallax value in the list of matched points, determining a set of x-dimension parallax values for the set of feature points, and adjusting a convergence calibration value (Ry) of the stereo imaging system. The method may be performed while the system is in operation without the need for a special calibration setup.

This invention discloses a portable binocular stereoscopic imaging device based on a single camera, applicable to the field of medical aesthetics. The device comprises an image acquisition component, a supplementary lighting component, and a laser locator. The image acquisition component receives images of the subject reflected from optical paths in two directions, thereby performing 3D modeling. The supplementary lighting component has a mirror angle identical to that of the image acquisition component, ensuring the supplementary lighting angle matches the shooting angle, allowing for uniform illumination of the subject, enhancing lighting, and eliminating shadows. The laser locator allows for adjusting the angle of the laser emitter to set different shooting distances for different subjects. This invention achieves single-camera binocular stereoscopic imaging while not only providing more uniform supplementary lighting but also enabling more convenient adjustment of the shooting distance.

To provide a stereo imaging system which remotely obtains an imaging range and an imaging distance, and can precisely and accurately perform stereo imaging, at a position away from an operator operating a stereo camera in a narrow space such as the top of a steel tower.SOLUTION: An operator A carries a stereo imaging device 50 which includes a center unit 80 having digital cameras (90, 100) at right and left sides, and a center digital camera 81 and distance sensors (82, 84) at the center. An operator B at a remote position carries a tablet 200 so as to perform shutter photographing with the tablet 200.SELECTED DRAWING: Figure 1

The invention relates to ground surface estimation using stereoscopic imaging for autonomous and semi-autonomous systems and applications. Embodiments of the present disclosure relate to surface estimation with stereoscopic imaging and surface disparity. For example, a three-dimensional (3D) surface structure may be modeled as a disparity field, and a surface disparity field representing a surface (e.g., ground) in an environment may be generated using a constrained non-linear hierarchical optimization that is used to process stereoscopic image data, such as stereoscopic image data. And iteratively refining the estimated surface disparity values based on weights that guide the optimization to expected surface values (e.g., ground, road). The resulting surface (e.g., ground) disparity field may be used for various downstream tasks, such as obstacle detection, airworthiness space segmentation, self-motion refinement, and / or generation of an estimated surface profile.

The invention discloses a three-dimensional endoscope system and an endoscope system. The three-dimensional endoscope system comprises a light source device, a light transmitting bundle, an endoscope, a camera host and a display device, the light source device comprises a light source assembly and a light output end connected with the light source assembly. The light source assembly comprises a visible light source, a first laser light source and a second laser light source. The endoscope comprises an illumination channel and a binocular imaging channel; the input end of the illumination channel is connected with the light output end through a light guide bundle, and the output end of the illumination channel is used for transmitting light emitted by the light source assembly to a to-be-observed part; each imaging channel comprises an image sensor for receiving an optical signal from a to-be-observed part; the camera host is used for receiving the left and right light signals of the to-be-observed part through the image sensor to generate image signals, and generating at least one three-dimensional endoscope image according to the left and right image signals; the display device is used for displaying at least one stereoscopic endoscope image; and multispectral stereo imaging can be realized.

The present invention belongs to the field of medical imaging technology, and specifically relates to a method and system for stereoscopic imaging of anterior mediastinal surgery based on big data. The invention performs parallel preprocessing of multimodal medical imaging data through a distributed computing framework, effectively improving the speed and efficiency of data processing. By comparing and analyzing different baseline image data, overlapping areas and independent areas can be determined, and the overlapping areas can be partitioned accordingly. In the three-dimensional reconstruction stage, the independent areas and overlapping sub-partitions are reconstructed in three dimensions, generating a three-dimensional image model of the independent area and a fused three-dimensional image model of the overlapping sub-partition. The spatial topological structure and surface geometric features of the image data are fully considered to ensure the accuracy of the reconstructed image. In the image reconstruction stage, the three-dimensional image model of the independent area is combined with the three-dimensional image model of the overlapping sub-partition to generate a complete stereoscopic image of the anterior mediastinal surgery, providing a strong guarantee for the precise implementation of the surgery.

The application discloses a percutaneous needle type ultrasonic probe, which comprises a handle (1), an outer sleeve (2), a puncture tip (21) formed at the front end of the outer sleeve (2), an ultrasonic window (22) arranged at the side of the outer sleeve (2) close to the puncture tip (21), the outer sleeve (2) being provided with a first cavity (23) arranged along the axial direction, a rotating shaft (3) arranged in the first cavity (23), an ultrasonic assembly (4) arranged at the front end of the rotating shaft (3) and corresponding to the position of the ultrasonic window (22) when arranged in the first cavity (23), and a rotating mechanism (5) for driving the rotating shaft (3) to rotate and thus driving the ultrasonic assembly (4) to rotate, wherein the rotating mechanism (5) is arranged in the handle (1). The percutaneous needle type ultrasonic probe can directly penetrate into tissues through skin, obtain high-resolution ultrasonic images, and generate two-dimensional and real-time three-dimensional stereoscopic images through multi-angle rotation, thereby providing accurate ultrasonic guidance for diagnosis and interventional treatment, and being suitable for precise treatment operations such as tumor ablation, drug delivery and energy delivery.

The invention discloses a naked eye stereo imaging intelligent photo frame, and relates to the technical field of intelligent photo frames, the naked eye stereo imaging intelligent photo frame comprises a shell, one side of the shell is provided with a front shell, and the other side of the shell is provided with a rear shell; the display module is mounted in the shell; the adjusting assembly is installed in the shell and located on the periphery of the display module; the adjusting frame is fixed on the adjusting assembly; and the stereo imaging module is fixed in the adjusting frame and is arranged corresponding to the display module.

The application discloses a kind of corrosion methods for revealing alloy sample metallographic structure, comprising: step S1, preparation electrolytic etchant: using oxalic acid, sodium bicarbonate and concentrated nitric acid preparation final concentration is 0.25-0.5mol / L sodium oxalate and 0.15-0.3mol / L nitric acid mixed aqueous solution;Step S2, electrolytic etching of corrosion piece: electrolytic etchant is poured into electrolytic etching instrument, and the alloy sample to be corroded is placed in electrolytic etching liquid and electrolytic etching is carried out.The electrolytic etchant of the application uses oxalic acid, sodium bicarbonate and concentrated nitric acid as reactant, and is prepared by chemical ion reaction.After the preparation of etchant is finished, a small amount of carbonate ions and hydrogen ions are still stored in the etchant, so that a small amount of carbonate ions and hydrogen ions will continue to react when the alloy sample is electrolyzed, and micro-bubbles are attached to the alloy sample, so that the metallographic photo taken has stereoscopic imaging effect, and the grain boundary is clear and identifiable.

The application discloses a modular multi-channel ultrafast framing camera and a multi-pulse laser combined imaging system, and relates to the technical field of ultrafast imaging and photoelectric measurement. The camera comprises a common-aperture framing optical assembly, a double-camera assembly and a total electronic control assembly, can be combined to realize single-view four-channel eight-framing imaging, can be split to realize double-view four-framing stereoscopic PIV imaging, and the double assemblies share a total electronic control unit. The laser system comprises two multi-pulse lasers, a synchronous control module and a beam combination unit, can be combined to form eight-pulse illumination, or independently output adaptive double-view illumination. The imaging system takes laser as a time sequence main source, is synchronized with the camera at the nanosecond level, and a single-frame ultra-short exposure can freeze a high-speed transient process. The application is convenient to switch between double modes, efficient to deploy, does not need to repeatedly purchase hardware, has a high cost performance, and is suitable for high-precision measurement of high-speed supersonic flow and other transient processes.

A three-dimensional display method for video conference and the video conference system are provided. The three-dimensional display method includes the following steps. A first electronic device generates an image. The first electronic device encodes a hidden watermark in the image. The first electronic device transmits the image to a second electronic device. The second electronic device displays the image in a window of a display frame. The second electronic device searches for a rectangular box on the display frame. The second electronic device determines whether the hidden watermark is decoded in the rectangular box. If the hidden watermark is decoded in the rectangular box, the second electronic device performs a stereoscopic imaging process for the content of the rectangular box.