125 results about "Fluoroscopic image" patented technology

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 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 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 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

The invention discloses a quantitative detection method for anti-perspective performance of a textile in a complex light environment, and belongs to the technical field of new material detection, a micro gap is arranged between the textile to be detected and a variable-frequency gray scale target to simulate a non-clinging state when clothes are worn and excite Fresnel diffraction and subsurface scattering effects, and the anti-perspective performance of the textile is detected. Complex illumination conditions such as backlight and sidelight are simulated by adjusting the light intensity ratio, and after a target perspective image is acquired by using an image acquisition unit, the modulation transfer function attenuation rate of a to-be-detected textile to the target is calculated, so that the anti-perspective performance of the textile is quantitatively represented; the interference of glare on the surface of the high-gloss fabric is effectively eliminated by introducing an orthogonal polarization modulation technology, and a detection result is highly consistent with the visual perception of human eyes by adopting a specific light source spectrum simulating the skin color of a human body; compared with a traditional light transmittance method, the method has the advantages that the dimension crossing from luminous flux measurement to image information fidelity evaluation is realized, and the accuracy, reliability and practicability of detection are remarkably improved.

The invention relates to a front sight laser aiming auxiliary device which is used for guiding a kirschner wire to present a point-shaped perspective shadow on a C-arm screen in an orthopedic operation, and belongs to the technical field of medical instruments. The device aims at solving the problems that in traditional Kirschner wire perspective point forming operation, repeated perspective depends on the experience of an operator, radiation exposure is large, and operation precision is difficult to guarantee. The device mainly comprises a front sight base which can be fixed on the surface of a receiver of the C-arm machine, wherein a ball head base is arranged in the center of the front sight base; and the ball head laser indicator is arranged on the base and is adjustable in laser direction. When in use, the perspective image is adjusted to the central position of the front sight on the screen by moving the metal point on the operating table. Installing a laser lamp, adjusting the laser lamp to irradiate on a metal point on an operating table, and screwing a nut to fix the position of the laser lamp at the moment. Therefore, a visible laser guide line coinciding with the path of the target X-ray beam is established. And an operator only needs to adjust the guide needle along the laser ray and place the guide needle, so that the guide needle can be stably developed in a point shape in a perspective image, and accurate and rapid screw guide needle placement is realized. The device is simple in structure, low in cost, intuitive in operation, capable of remarkably reducing intraoperative radiation and reducing dependence on experience of operators, and suitable for being used in hospitals of all levels to carry out precise orthopedic surgery under perspective guidance.

The application provides a perspective image reconstruction method and a readable storage medium. The perspective image reconstruction method comprises the following steps: setting a plurality of calculation nodes in series based on a perspective image reconstruction process, and the plurality of calculation nodes work in parallel; inputting a view data to a first calculation node of the plurality of calculation nodes in a time period; and outputting a perspective image by a last calculation node of the plurality of calculation nodes. In this way, each calculation node operates independently and does not interfere with each other, and each calculation node processes one view data at a time, the data amount involved in each execution is small, the scheduling is convenient, the view data can be discarded immediately after being used, and the consumption of memory and display memory is reduced. Thus, the problem that the reconstruction method in the prior art has a long delay, a low refresh frequency and cannot meet the real-time requirement of the perspective image in special occasions is solved.

The present invention enables more accurate estimation of a three-dimensional structure including an internal structure of a target without requiring a large number of captured images. A three-dimensional structure estimation device (10) includes: an acquisition unit (111) that acquires a plurality of fluoroscopic images obtained by imaging a target from mutually different directions; a learning unit (112) that, using the plurality of fluoroscopic images, learns a learning model to which input data indicating three-dimensional coordinates of an arbitrary point inside the target is input and which outputs first output data indicating a signed distance of the arbitrary point with respect to a surface of an internal structure possessed by the target and second output data indicating a first attenuation coefficient at the arbitrary point; a calculation unit (113) that inputs, to the learning model, input data indicating respective points inside the target and, by correcting the first attenuation coefficient indicated by the second output data on the basis of the signed distance indicated by the first output data, calculates second attenuation coefficients at the respective points inside the target; and an estimation unit (114) that estimates a three-dimensional structure of the target on the basis of the second attenuation coefficients at the respective points inside the target.

Provided is an X-ray imaging apparatus that enables an operator to freely manually move an X-ray source along a rail installed on a ceiling or a floor, and can capture a fluoroscopic image. An X-ray control unit continuously emitting X-rays from an X-ray source and permits fluoroscopy only in a case in which one or more predetermined conditions, including a condition in which the X-ray source is stopped at a predetermined position on a rail corresponding to a position at which an X-ray detector is held, are satisfied. Specifically, the X-ray control unit enables an operation of a fluoroscopy switch, and continuously supplies a tube current and a tube voltage to the X-ray tube in a case in which the operator operates the fluoroscopy switch.

Embodiments of systems and methods for generating see-through images include a vision sensor configured to generate an image of an environmental scene surrounding a vehicle, and one or more processors operable to generate, using a pre-trained neural network, a depth map of the environmental scene based on the image, determine whether the environmental scene includes a blocking object by comparing the depth map with historical depth information of the environmental scene, in response to determining that the environmental scene includes the blocking object, update, using the pre-trained neural network, the depth map by replacing depth information of the blocking object with the historical depth information of the environmental scene at an area of the blocking object, and project the updated depth map into a see-through image of the environmental scene.

Provided are an information processing method and the like that appropriately associate an image captured by an image acquisition catheter with an image captured by angiography even for a bent blood vessel.　The information processing method causes a computer to execute a process for: acquiring cross-sectional image information related to a plurality of cross-sectional images (71) of a blood vessel; acquiring, in perspective images (61), sensor position information related to the positions of a sensor used for capturing the respective cross-sectional images (71); acquiring designation of the visual field direction; and outputting either the shape of the blood vessel seen through in the acquired visual field direction or the angle relating to the visual field direction on the basis of the cross-sectional image information and the sensor position information.

An image pair comprising angiographic image data and bone image data showing the same area of a patient and taken from the same viewing direction onto the patient is acquired and overlaid over a live fluoroscopic image. In order to increase the perceivability of information in the angiographic image and / or the live fluoroscopic image in the overlay, a part of the bone image data is altered, for example attenuated, when the overlay is calculated. (Fig. 1)

Embodiments of systems and methods for generating see-through images include a vision sensor configured to generate an image of an environmental scene surrounding a vehicle, and one or more processors operable to generate, using a pre-trained neural network, a depth map of the environmental scene based on the image, determine whether the environmental scene includes a blocking object by comparing the depth map with historical depth information of the environmental scene, in response to determining that the environmental scene includes the blocking object, update, using the pre-trained neural network, the depth map by replacing depth information of the blocking object with the historical depth information of the environmental scene at an area of the blocking object, and project the updated depth map into a see-through image of the environmental scene.

A method performed by a computing system comprises receiving a fluoroscopic image of a patient anatomy while a portion of a medical instrument is positioned within the patient anatomy. The fluoroscopic image has a fluoroscopic frame of reference. The portion has a sensed position in an anatomic model frame of reference. The method further comprises identifying the portion in the fluoroscopic image and identifying an extracted position of the portion in the fluoroscopic frame of reference using the identified portion in the fluoroscopic image. The method further comprises registering the fluoroscopic frame of reference to the anatomic model frame of reference based on the sensed position of the portion and the extracted position of the portion.

The invention discloses a connector internal defect detection method and device and a medium, and the method comprises the steps: obtaining first X-ray exposure time corresponding to different types of metals in a to-be-detected connector, and obtaining second X-ray exposure time corresponding to different types of plastics; performing X-ray shooting on a metal area in the to-be-detected connector by using the first X-ray exposure time to obtain a metal perspective image, and performing X-ray shooting on a plastic area in the to-be-detected connector by using the second X-ray exposure time to obtain a plastic perspective image; fusing the metal perspective image and the plastic perspective image to generate an X-ray feature image corresponding to the to-be-detected connector; and positioning a defect region in the X-ray feature image through edge detection and a morphological segmentation algorithm, and identifying a defect type of the positioning region based on a convolutional neural network model.

The present disclosure relates to an X-ray fluoroscopy image generation method and device, and an X-ray fluoroscopy system. The generation method comprises determining a target line-of-sight vector for a target organ according to an observation requirement and a target position of the target organ of a biological subject to be detected; determining a primary rotation angle and a secondary rotation angle of an imaging arm in an X-ray fluoroscopy device and determining a primary rotation matrix and a secondary rotation matrix based on the target line-of-sight vector; determining a target projection matrix that conforms to a target projection geometry based on the primary rotation matrix and the secondary rotation matrix; and performing volume rendering based on the target projection matrix and pre-acquired three-dimensional computed tomography (CT) data of the target organ to obtain a two-dimensional target X-ray fluoroscopy image under a target observation view angle. The X-ray fluoroscopy image generation method and device and the X-ray fluoroscopy system of the present disclosure can freely generate an X-ray fluoroscopy image under a desired observation view angle based on pre-acquired three-dimensional CT data.

The invention provides a self-adaptive viewpoint rendering method for a fixed display space, and belongs to the technical field of computer graphics and virtual reality. The method comprises the following steps: S1, performing hardware deployment and system preprocessing operation; s2, acquiring viewpoint position data of two eyes of an observer in the space in real time; s3, generating perspective image data corresponding to the display screen; s4, carrying out self-adaptive rendering image generation operation; and S5, synchronously outputting the display picture and dynamically updating the display picture. The method has the beneficial effects that radar and camera dual data sources and dual-confidence judgment can effectively cope with various complex scenes, and the accuracy under severe working conditions is ensured; weight correction can improve the adaptation degree of fusion data in different scenes; and due to the introduction of the resolution sensitivity coefficient, the resource investment can be reduced in a low-attention area, the cost is reduced, and the efficiency is improved.

To detect the body movement of a subject during photographing a fluoroscopic image.SOLUTION: An image of a subject is captured by a camera provided in the X-ray imaging apparatus. First, the skeleton of a human figure included in an image is detected, and the skeleton of a subject placed on the top plate of an X-ray imaging apparatus is extracted based on the detected skeleton. A movement amount (optical flow) of corresponding pixels is calculated between the captured image and an image acquired by the camera at a timing earlier than a timing at which the captured image is acquired by a predetermined time. A plurality of regions of interest are set in the image of the subject based on the position of the skeleton of the subject. The number of regions of interest in which the movement amount of the pixel of the subject in the region of interest is larger than a predetermined threshold is obtained, and when the obtained number of regions of interest is larger than a predetermined value, it is determined that the body movement occurs in the subject.SELECTED DRAWING: Figure 8

Imaging systems and methods compensate for wigwag movement of a C-arm fluoroscope to refine camera pose estimates. The methods involve computing a primary movement axis from samples of markers in fluoroscopic images of a fluoroscopic sweep of a structure of markers and processing the primary movement axis to obtain a secondary movement axis. The methods further involve aligning two-dimensional samples of each marker with the primary and secondary movement axes to obtain an aligned signal and determining a difference signal for a secondary component of the aligned signal. The difference signal is then converted to a rotation axis translation signal. The method further involves estimating a 3D position of the rotation axis. The estimated pose of the C-arm fluoroscope is then refined to compensate for the wigwag movement using the rotation axis translation signal and the estimated 3D position of the rotation axis.

The invention provides a method and system for reconstructing a three-dimensional CT according to a single two-dimensional X-ray perspective image through reinforcement learning, and belongs to the technical field of image reconstruction. Processing the obtained X-ray perspective image by using a pre-trained reconstruction model to obtain a reconstructed three-dimensional CT image; wherein the training set is used for training to obtain the reconstruction model, and each group of training data comprises a three-dimensional CT at a t1 moment, a three-dimensional CT at a t2 moment and an X-ray perspective image corresponding to the CT at the t2 moment. According to the method, the three-dimensional CT reconstruction precision and credibility are improved by utilizing strong modeling and solving capabilities of reinforcement learning; the method can further improve the reconstruction precision and speed of three-dimensional CT, and is of great significance in reducing the imaging dosage, improving the imaging quality and improving the cancer treatment level.

The invention provides a panoramic three-dimensional reconstruction method, device and equipment and a medium, and relates to the field of three-dimensional reconstruction. Comprising the following steps: performing panoramic image inner mapping and self-pairing on each panoramic image in a plurality of panoramic images of a target scene to obtain a first image pair set; performing mapping and cross-image pairing among the panoramic images for the plurality of panoramic images to obtain a second image pair set; for the first image pair set and the second image pair set, communicating the self-pairing and cross-image pairing relationship to obtain a third image pair set, and further completing the image pair set; inputting the complete image pair set into a pre-trained three-dimensional reconstruction model to obtain a local three-dimensional reconstruction result of each candidate perspective image in the complete image pair set; and carrying out pose prior driven global alignment on the local three-dimensional reconstruction result to obtain a panoramic three-dimensional reconstruction result of the target scene so as to realize accurate and efficient panoramic three-dimensional reconstruction on the basis of no training.

The present application relates to a kind of car perspective image sharing method, system, equipment and medium.The method includes real-time acquisition environment image in front and / or side of the car;Image processing is carried out to the environment image, and the image processing at least includes one or more of image repair processing, multi-path image splicing processing and target marking processing, obtains the environment image after processing;The processed environment image is displayed to the rear of the car, for the driver of the vehicle located in the rear of the car observation.The method is by obtaining the environment image in front and / or side of the car, and is shown to the vehicle in the rear, so that the driver of the rear vehicle can be in advance to judge the braking or steering intention of the front vehicle, effectively reduce the rear-end collision caused by sight obstruction, improve the overall safety of queue driving.

The invention provides an X-ray imaging device, which aims to optimize timing of body movement warning and prevent false alarm. This X-ray imaging device is provided with: a top plate on which a subject is mounted; an X-ray irradiation device that irradiates a subject with X-rays; an X-ray detector that detects the X-rays irradiated from the X-ray irradiation device and transmitted through the subject; an image generation unit that generates a fluoroscopic image on the basis of the output of the X-ray detector; a body movement detection unit that receives and processes an image from a camera that captures an image of the subject, and detects the occurrence of body movement of the subject; a notification unit that notifies the occurrence of body movement; and a processor that controls the notification unit. When the body movement detection unit detects the body movement and it is determined that a preset notification start condition is satisfied, the processor causes the notification unit to start notification of the occurrence of the body movement.

The program causes the computer to execute the following processes: acquiring a perspective image of a patient to be subjected to a process relating to the artificial hip joint; identifying an inner plate line in the pelvis of the patient in the acquired perspective image, the inner plate line representing a maximum cutting site when cutting the pelvis in order to configure an acetabular cup included in the artificial hip joint; identifying a bid line in the patient's pelvis, the bid line representing a minimum cutting site when cutting the pelvis in order to configure the acetabular cup; deriving the CE angle of the acetabular cup when the disposition of the acetabular cup is assumed in a state in which the pelvis of the patient is cut with a bone digging reamer for the treatment related to the artificial hip joint; displaying the identified inner plate line and the identified necessary line on the perspective image in an overlapping manner; and attaching the exported CE angle of the acetabular cup to the perspective image for displaying.

A system of the subject technology includes a number of external sensors placed on a body of a vehicle to provide first data and at least one internal sensor placed inside of the vehicle to provide second data. The system further includes a processor to process the first data and the second data to generate a through-view image including a three-dimensional (3-D) world representation from a perspective of a driver of the vehicle.

The invention discloses a cone-beam CT arterial phase automatic scanning method and system based on forward projection, and relates to the technical field of medical image.The method comprises the steps that low-dose cone-beam CT pre-scanning is conducted on a target area when a contrast agent is not injected, a three-dimensional image is reconstructed, a to-be-monitored anatomical structure is selected on the three-dimensional image to form a three-dimensional area of interest, and the three-dimensional area of interest is obtained; the method comprises the following steps of: performing forward projection on a three-dimensional region of interest based on cone beam CT geometric parameters to obtain a two-dimensional monitoring region template corresponding to each rack angle, acquiring a real-time perspective image sequence in a contrast agent injection process, calling the corresponding two-dimensional monitoring region template for each frame of image to calculate a monitoring signal, acquiring a baseline value before contrast, calculating a difference value, and acquiring a real-time perspective image sequence; when the difference value reaches a preset threshold value, a trigger signal is output to start arterial phase cone beam CT scanning. Through three-dimensional pre-scanning targeted forward projection and real-time threshold monitoring, the arrival of a target focus contrast agent is accurately judged, the accuracy of the imaging opportunity in the arterial phase is improved, and the radiation dose is reduced.

Systems and methods for visualizing navigation of a medical device with respect to a target using a live fluoroscopic view. The methods include determining a level of zoom of a fluoroscope when acquiring a reference frame. The methods further include determining whether the live fluoroscopic images evidence movement of the fluoroscope relative to its position when capturing a reference frame.

Various methods and systems for x-ray imaging are provided. In one embodiment, a method includes: acquiring a plurality of fluoroscopic images depicting an interventional tool positioned relative to an anatomical structure 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 anatomical structure of interest in the corrected plurality of fluoroscopic images; and displaying an image with the segmented interventional tool registered to the anatomical structure of interest. In this way, a physician can view the position and movement of an interventional tool located within a patient's body relative to a static image of the anatomical structure without motion artifacts or errors caused by patient motion such as respiratory motion or cardiac motion.