313 results about "Fluoroscopic image" patented technology

An apparatus includes a base having a platform configured for placement of one or more items on a surface of the platform, a frame coupled to the base, and a plurality of camera units coupled to the frame. Each camera unit is configured to capture images of at least a portion of the platform and the plurality of camera units includes a plurality of side-view camera units arranged above the platform along a horizontal plane, wherein each camera unit of the side-view camera units comprises two vertically stacked cameras and is configured to capture perspective images of at least a portion of the platform. An overhead-view camera unit is positioned over the platform, wherein the overhead-view camera unit comprises two cameras and is configured to capture top view images of the platform.

The invention is a delivery catheter, e.g., a guide catheter, having an imaging element in proximity to the distal end of the catheter. Catheters of the invention are able to placement of the catheter in proximity to an ostium, thereby increasing the efficiency of contrast delivery while reducing the risk of ischemia due to blocked blood supply. The invention additionally assists in maintaining catheter position during delivery of a fluid from the catheter, resulting in better performance with less fluid. For example, a catheter of the invention can be used to produce improved fluoroscopic images with less overall contrast. This improvement reduces the risk of an allergic reaction to the contrast while decreasing the length of time for a procedure, i.e., because of a need to re-contrast.

A medical image processing device of an embodiment includes first and second image acquirers, a generator, and a calculator. The first image acquirer acquires a first fluoroscopic image of a patient. The second image acquirer acquires a second fluoroscopic image according to radiation of the patient at a time point different from that of acquisition of the first image using a detector. The generator generates a reconstructed image by reproducing the second image from the first image virtually arranged in a three-dimensional space on the basis of a position of the detector in the three-dimensional space. The calculator obtains a suitable position on the first image in the three-dimensional space on the basis of a degree of similarity between the second image and the reconstructed image. The generator generates the reconstructed image for use in the calculator and has a range larger than a range corresponding to the second image.

Particular embodiments are directed to passthrough image generation for a mixed-reality experience. A device may determine, using an eye-tracking system of a head-mounted device, eye-tracking data associated with a user of the head-mounted device. The device may determine, based on the eye-tracking data, a desired scene depth for the user. The device may instruct a first autofocus camera of the head-mounted device to adjust a first focus distance based on the desired scene depth and capture a first image of a real-world environment of the user. The device may generate a first passthrough image based on the first image. The device may display the first passthrough image to a first eye of the user via a first display of the head-mounted device.

A route planning method includes displaying a perspective switching control and a current perspective display area on a route planning interface. The perspective switching control is configured to switch a current perspective image in the current perspective display area from a first perspective image to a second perspective image in response to a perspective switching instruction. The first perspective image is one of a plurality of perspective images including a first-person perspective image and a third-person perspective image. The second perspective image is another one of the plurality of perspective images. The method further includes, in response to a waypoint creation instruction, creating a waypoint based on a position of a movable platform in the current perspective image.

An apparatus includes a memory and processing circuitry in communication with the memory. The processing circuitry is configured to apply, based on a positional encoding model, a first feature conditioning module to a set of bird's eye view (BEV) position data features corresponding to position data to generate a set of conditioned BEV position data features, and apply, based on the position encoding model, a second feature conditioning module to a set of perspective image data features corresponding to image data to generate a set of conditioned perspective image data features. The processing circuitry is also configured to generate, based on the positional encoding model, the set of conditioned BEV position data features, and the set of conditioned perspective image data features, a weighted summation. Additionally, the processing circuitry is configured to generate, based on the weighted summation, a set of BEV image data features.

The invention provides a target positioning method and device based on a medical perspective. The method is applied to medical image processing. The method comprises the following steps: selecting a two-dimensional medical perspective image under any two visual angles, and obtaining two-dimensional pixel coordinates and image parameters of a target point on the perspective image; a target coordinate conversion matrix is calculated according to the image parameters, the target coordinate conversion matrix is used for converting two-dimensional pixel coordinates of the target point into three-dimensional world coordinates, and the target coordinate conversion matrix is composed of conversion parameters of a two-dimensional pixel coordinate system, a two-dimensional image coordinate system, a three-dimensional camera coordinate system and a three-dimensional world coordinate system; substituting the two-dimensional pixel coordinates of the target points of the double viewing angles into the target coordinate conversion matrix, and calculating to obtain the three-dimensional world coordinates of the initial target points of the double viewing angles; and processing and calculating according to the dual-view initial target point and the three-dimensional world coordinate to obtain the three-dimensional world coordinate of the target point. According to the invention, the target point can be quickly and accurately positioned.

The invention provides an HDI circuit board and method for an intelligent mobile communication terminal, and relates to the technical field of circuit board detection. According to the method, image distortion feature extraction and spatial feature enhancement are carried out on a blind hole stack perspective reference image extracted from a database and a blind hole stack perspective image obtained through perspective of an X-ray detector by adopting an image detection and analysis technology based on computer vision; and intelligently obtaining a distortion correction coefficient according to a semantic metric value between the enhanced blind hole stacking perspective reference feature and the blind hole stacking perspective detection feature. Therefore, the accuracy of offset measurement can be improved. And by adopting an image processing technology based on computer vision, not only is the detection precision improved, but also the intelligence of offset measurement is realized, so that the blind hole offset detection in a complex environment is more reliable and efficient.

Disclosed are approaches that may provide image-guidance to interventionalists by providing true 3D visualization and quantitative feedback in real-time. A guidance system may allow a physician to manipulate a medical device and see a 3D rendering with quantitative feedback floating in mixed reality, next to standard monitors. Image tracking may detect and co-register the medical device's 3D position using, for example, bi-plane C-arm X-ray fluoroscopy and provide a 3D trajectory as quantitative feedback. Patterns in a fluoroscopic image may be used to accurately determine an object's z-position from a single angle projection.

The invention provides a target positioning method and device based on image parameter optimization. The method is applied to medical image processing. The method comprises the following steps: selecting a two-dimensional medical perspective image under any two visual angles, and obtaining two-dimensional pixel coordinates and image parameters of a target point on the perspective image; obtaining a three-dimensional world coordinate of the target point according to the two-dimensional medical perspective image under any two visual angles; updating image parameters of the medical perspective according to the three-dimensional world coordinates; calculating a target coordinate conversion matrix according to the updated image parameters, wherein the target coordinate conversion matrix is used for converting a two-dimensional pixel coordinate of the target point into a three-dimensional world coordinate; substituting the two-dimensional pixel coordinates of the dual-view target point into the target coordinate conversion matrix to obtain the three-dimensional world coordinates of the dual-view updated target point; and performing processing and calculation according to the updated target point of the double visual angles and the three-dimensional world coordinate to obtain the three-dimensional world coordinate of the actual target point. According to the invention, the accuracy of the three-dimensional coordinate of the actual target point is improved.

Various methods and systems are provided for x-ray imaging. In one embodiment, a method includes acquiring a plurality of fluoroscopic images depicting an interventional tool positioned relative to an anatomy of interest of a patient, segmenting the interventional tool in the plurality of fluoroscopic images, measuring motion of the patient in the plurality of fluoroscopic images, correcting the plurality of fluoroscopic images to remove the motion of the patient, registering the segmented interventional tool to the anatomy of interest in the corrected plurality of fluoroscopic images, and displaying images with the segmented interventional tool registered to the anatomy of interest. In this way, a practitioner may view the position and movement of an interventional tool located within a patient relative to static images of the anatomy without motion artifacts or errors induced by patient motion such as respiratory motion or cardiac motion.

Methods and systems for X-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a handheld X-ray emitter operative to capture non-invasive images of a target; a stage operative to capture static X-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the X-ray emission to improve safety of obtaining X-ray images as well as improve the quality of X-ray images. Where the devices can automatically limit the field of the X-ray emission.

Systems and methods for view-conditioned diffusion for real-world vehicle gaussian splatting. A single perspective image can be transformed using image transformation techniques to generate a training dataset that addresses a domain gap between synthetic data and real-world data in a traffic scene. A pre-trained diffusion model can be finetuned with the training dataset to obtain a fine-tuned diffusion model. Perspective-aware images having different perspective views of an entity from the single perspective image can be generated using the fine-tuned diffusion model. A large generative model (LGM) can be trained using the perspective-aware images to generate a gaussian splatting model for the entity. View-conditioned simulations from the single perspective image can be generated by using the gaussian splatting model for downstream tasks.

Methods and systems for x-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a hand-held x-ray emitter operative to capture digital or thermal images of a target; a stage operative to capture static x-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the x-ray emission; a device to automatically limit the field of the x-ray emission; and methods of use and use of such systems to register a virtual model of an anatomic structure to the corresponding anatomic structure.

Methods and systems for x-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a hand-held x-ray emitter operative to capture digital or thermal images of a target; a stage operative to capture static x-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the x-ray emission; a device to automatically limit the field of the x-ray emission; and methods of use and use of such systems to register a virtual model of an anatomic structure to the corresponding anatomic structure.

Methods and systems for X-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a handheld X-ray emitter operative to capture non-invasive images of a target; a stage operative to capture static X-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the X-ray emission to improve safety of obtaining X-ray images as well as improve the quality of X-ray images. Where the devices can automatically limit the field of the X-ray emission.

Methods and systems for x-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a hand-held x-ray emitter operative to capture digital or thermal images of a target; a stage operative to capture static x-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the x-ray emission; a device to automatically limit the field of the x-ray emission; and methods of use and use of such systems to register a virtual model of an anatomic structure to the corresponding anatomic structure.

Methods and systems for X-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a handheld X-ray emitter operative to capture non-invasive images of a target; a stage operative to capture static X-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the X-ray emission to improve safety of obtaining X-ray images as well as improve the quality of X-ray images. Where the devices can automatically limit the field of the X-ray emission.

A method includes obtaining multiple see-through image frames of an environment around an augmented reality (AR) device using multiple imaging sensors of the AR device. The method also includes generating a depth map based on the see-through image frames and generating a three-dimensional (3D) representation of the environment based on the depth map. The method further includes projecting the 3D representation onto a curved surface, mapping points of the projected 3D representation to multiple virtual view images, and presenting the virtual view images on one or more displays of the AR device. Generating the depth map may include generating an initial depth map using a trained machine learning model and modifying the initial depth map to provide both spatial consistency and temporal consistency in order to generate a refined depth map. The curved surface may include a portion of a cylindrical, spherical, or conical surface.

The invention provides an empty box detection method and device, a storage medium and a program product. The empty box detection method comprises the following steps: acquiring a perspective image of a vehicle declared as an empty box; segmenting the perspective image to obtain a carriage image of the vehicle; detecting whether the to-be-detected article is a suspected article or not under the condition that the compartment image is identified to comprise the to-be-detected article; under the condition that the to-be-detected article is not the suspected article, identifying whether the to-be-detected article is a white list article or not by utilizing a machine learning model; and outputting risk indication information according to an identification result of the machine learning model.

The gas-phase welding equipment comprises a liquid storage tank, a preheating device, a heating cavity and a perspective imaging system, the liquid storage tank is used for storing gas-phase liquid, the preheating device is connected to the liquid storage tank and heats the gas-phase liquid to a first temperature, and the heating cavity is connected to the preheating device and heats the gas-phase liquid to a second temperature. The perspective imaging system is used for heating the gas-phase liquid until the gas-phase liquid is evaporated so as to heat a workpiece, the perspective imaging system comprises a ray imaging assembly, a servo driving mechanism and a digital imaging device, the ray imaging assembly is arranged above the heating cavity through the servo driving mechanism, and the ray imaging assembly can be located in the heating cavity through the servo driving mechanism to carry out horizontal moving scanning; the digital imaging device is arranged below the heating cavity and used for receiving rays of the ray imaging assembly to form a perspective image, and specific defect factors can be analyzed according to the perspective image of a workpiece welding spot, so that the specific defect factors are fed back to gas-phase welding equipment to adjust corresponding working parameters such as pressure, temperature, constant-temperature time and cooling slope.

According to the present invention, at least one image pair, consisting of a fluoroscopic image and an angiographic image taken from the same viewing position of the imaging device relative to the patient at the time of capturing the respective image, is acquired. This is referred to as the acquisition phase. This is followed by a live phase, in which a live fluoroscopic image is registered individually with the fluoroscopic image of at least one image pair, such that the spatial relationship between the live fluoroscopic image and the fluoroscopic image, and thus with the angiographic image and the image pair in general, becomes known. Angiographic information representing the vascular structure can then be taken from the part(s) of the angiographic image(s) within the image pair(s) which overlap with the live fluoroscopic image and be overlayed over the live fluoroscopic image. The present invention focusses on the acquisition phase, in which the fluoroscopic image and / or the angiographic image of at least one of the at least one image pair is displayed after acquisition of said fluoroscopic or angiographic image, respectively. The position at which the image is displayed depends on the viewing position of the imaging device relative to the patient when capturing the respective image.

A computer implemented method of generating angulation information for a fluoroscopic imager based on a 3D image, comprising: (a) identifying one or more features in a fluoroscopic image acquired with known angulation information; (b) identifying an angulation of projection of the 3D image which would produce a similar feature arrangement; and (c) generating an instruction or an alert to an operator based on a difference between said identified angulation and an angulation used to acquire the fluoroscopic image.

The invention provides an interventional medical needle three-dimensional modeling method and device based on a medical perspective. The method is applied to medical imaging field. The method comprises the following steps: acquiring a two-dimensional medical perspective image of a target interventional medical needle; respectively acquiring two-dimensional pixel coordinates of a needle tip and a needle tail on the two-dimensional medical perspective image; coordinate transformation is carried out according to the two-dimensional pixel coordinates of the needle tip and the needle tail, and the three-dimensional world coordinates of the needle tip and the three-dimensional world coordinates of the needle tail are obtained; generating a needle passage three-dimensional center line of the target interventional medical needle according to the three-dimensional world coordinates of the needle tip and the three-dimensional world coordinates of the needle tail; obtaining radius information of the target interventional medical needle; determining a direction vector according to coordinates of two adjacent points on the three-dimensional center line of the needle passage; generating a spatial circular surface according to coordinate points and radius information on the three-dimensional center line of the needle passage; and constructing a three-dimensional body model of the target interventional medical needle according to the spatial circular surface and the direction vector. According to the invention, the accuracy and efficiency of three-dimensional modeling of the target interventional medical needle are improved.

The invention relates to the technical field of industrial vision, in particular to an intelligent fruit quality grading method and system based on computer vision. According to the method, a fruit digital twinborn tensor is constructed by aligning visible light and perspective images, and semantic association and weighted fusion of internal and external features are realized by using a cross-dimensional semantic bridging matrix. Furthermore, heterogeneity-quality feature decoupling flow is adopted, the feature space is forcibly split into safety and quality feature vectors under the orthogonal loss constraint, and a safety and taste double-effect atlas is generated based on the safety and quality feature vectors so as to output a grading instruction. The method effectively solves the problems that the moldy core and the physical damage are difficult to distinguish and the sugar degree prediction is interfered by rotting fermentation, and realizes the accurate elimination of the pathological defects of the fruits and the lossless grading of the flavor quality.

The invention provides a multi-level domain adaptive pedestrian detection method and system based on a teacher model, and the method comprises the steps: training a target detector through employing source domain perspective image data with a pedestrian label, and obtaining an initial target detector; constructing a target domain teacher model and a cross-domain student model; and performing multi-level domain adaptive adversarial training by using the cross-domain student model, updating parameters of the target domain teacher model through index moving average of the weight of the cross-domain student model, generating a pseudo label to supervise the multi-level domain adaptive adversarial training of the cross-domain student model, and optimizing the cross-domain student model in combination with a designed loss function. Obtaining a final cross-domain student model; and detecting pedestrians in the overlooking fisheye image to be detected based on the final cross-domain student model. According to the technical scheme of the invention, the requirements of people flow statistics, safety monitoring and people flow guidance on rapid and accurate detection of pedestrians in a scene can be met.

The invention provides an image segmentation method and device, a storage medium and a program product. The image segmentation method comprises the steps of collecting a perspective image of a vehicle; extracting a feature map of the perspective image; processing the feature map by using a detection branch model in a machine learning model, and generating a plurality of mask confidence coefficients of each target object in the perspective image; processing the feature map by using a segmentation branch model in a machine learning model to generate a plurality of mask prototype maps in one-to-one correspondence with the plurality of mask confidence coefficients; generating a target mask by using the plurality of mask confidence coefficients and the plurality of mask prototype graphs; and obtaining an instance segmentation result of each target object according to the target mask.

The invention discloses a method, a system, a medium and equipment for panoramic display of underground facilities, and belongs to the technical field of augmented reality visualization. The method comprises the following steps: real picture data of a real camera in a target area is acquired in real time, and the real picture data of the real camera are acquired based on pose data of the real camera; synchronously adjusting the pose state of a virtual camera configured in the fused three-dimensional model; wherein the fused three-dimensional model is obtained by performing space alignment based on an underground facility three-dimensional model and a ground three-dimensional model; according to the pose state, performing perspective projection rendering and image matting processing on the fused three-dimensional model to obtain an underground facility image only containing a view angle corresponding to the current pose state; and carrying out picture fusion on the real picture data and the underground facility image to obtain a virtual-real fused perspective image, and displaying the virtual-real fused perspective image. By implementing the method and the device, the problem that the underground facility shielded by the ground cannot be accurately and stably displayed in a real-time picture of a common camera in the prior art can be solved.

To provide a radiation inspection device that can acquire a transparent image with high image quality regardless of the level of skill of a user by automatically adjusting the thickness or material of a filter.SOLUTION: A radiation inspection device comprises: a radiation source 2 that emits a radiation beam; a detector 3 that is provided opposite to the radiation source 2 and receives input of the radiation beam; a filter adjustment unit 4 that adjusts the attenuation factor of a filter F provided between the radiation source 2 and the detector 3 so as to attenuate the signal quantity I0 of radiation beam input to the detector 3; and a determination unit 942 that compares the signal quantity I0 of the radiation beam with a predetermined signal quantity Is. The filter adjustment unit 4 adjusts the attenuation factor of the filter F so that the signal quantity I0 of the radiation beam becomes equal to or less than the predetermined signal quantity Is.SELECTED DRAWING: Figure 1

To provide a head-mounted display (HMD) for use in a virtual reality (VR) environment in which a user can view the real world without removing the head-mounted display.SOLUTION: The HMD104 includes a display 108 for providing virtual content and / or images to the user 100 and image capture devices, such as the first camera 110 and / or the second camera 112. The first camera 110 and / or the second camera 112 are disposed in or near the front of the MD104 to capture images of the surroundings 102 and pass through the images of the surroundings to the user for viewing on the display. The environment 102 includes a computer 150 that communicatively couples to the HMD, the controller 106, the tracking system 122, and / or the remote computing resources 142 via a network 124 and / or wired technologies.SELECTED DRAWING: Figure 1