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54 results about "Bone area" patented technology
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Methods and apparatus for repairing and/or replacing intervertebral disc components and promoting healing
InactiveUS20110034975A1Increase riskFacilitates reconstructionInternal osteosythesisBone implantHerniated discsSurgical department
Disclosed embodiments provide for treatment of the anulus fibrosus (AF) and intevertebral disc (IVD), including herniated discs, anular tears of the disc, or disc degeneration, while enabling surgeons to contain blood, fluid, proteins, or other materials that are placed into or migrate into or near defective regions of the spine. The invention also concentrates mesenchymal stem cells (MSCs) in the surgical area and increases the area of bone to be fused. Other aspects of the invention may be used to raise the temperature of tissues, including surgical tissues, to stimulate inflammation, thereby stimulating tissue healing. According to these embodiments, the invention places a heating element below the skin and adjacent to the tissue to stimulate the healing thereof.
Owner:FERREE BRET A
Extraction method of blood vessel centerline
The invention discloses an extraction method of a blood vessel centerline. The extraction method comprises the following steps of: on the basis of a medical image, extracting blood vessels and a plurality of connected domains; screening the plurality of connected domains, and obtaining n blood vessel connected domains; on the basis of the direction coordinate value of each blood vessel connected domain, marking the n blood vessel connected domains in a descending order; according to a descending order marking sequence, connecting centerlines between the (m+1)th connected domain and the mth connected domain in sequence, and enabling the centerlines to grow until a centerline among the n blood vessel connected domains finishes growing; and on the basis of the centerline, extracting the blood vessels. By use of the extraction method, which is provided by the invention, of the blood vessel centerline, the blood vessels which tightly cling to a bone area can be extracted, and an integral blood vessel tissue is obtained.
Owner:SHANGHAI UNITED IMAGING HEALTHCARE
Method and system for automatically segmenting bones from abdomen image data
ActiveCN102968783AAvoid incomplete extractionAvoid the phenomenon of wrongly extracting blood vesselsImage analysisBone areaImage segmentation
The invention is suitable for the field of medical image segmentation and provides a method and system for automatically segmenting bones from abdomen image data. The method comprises the steps of automatically extracting a first segmentation result comprising an abdomen aorta or part of an abdomen aorta area in the abdomen image data according to shape features of the abdomen aorta; according to the first segmentation result, modifying data comprising the abdomen aorta or part of the abdomen aorta area in the abdomen image data to obtain abdomen image modified data; automatically selecting at least one seed point of the bones from the abdomen image data; and according to the seed point and the abdomen image modified data, obtaining a second segmentation result of the bones by first threshold connection. Accordingly, bone areas can be segmented from an abdomen image automatically and accurately.
Owner:SHENZHEN YORATAL DMIT
Geometric deformation based skin deformation method for three-dimensional animated character model
ActiveCN103679783AOvercome the disadvantages of prone to distortionImprove production efficiencyAnimationDeformation effectBone area
The invention relates to a geometric deformation based skin deformation method for a three-dimensional animated character model. The method comprises the steps that according to the skeleton structure of an initial character model, the initial character model is divided into joint areas and bone areas, and deformation control points among the bone areas are calibrated manually; according to the body zoom parameters set by a user and the calibrated deformation control points, geometric deformation is implemented on the bone areas of the initial character model based on a free deformation technology; after the geometric deformation, influence of joints on apexes is adjusted; and according to the influence of the joints on the apexes of the joint and bone areas, the character model is driven to make translational and rotary movement via a dual-quaternion method to generate vivid and lifelike skin deformation effect. The skin deformation method of the invention can overcome the defects as collapse and shape explosion caused by large moving amplitude of the model, and obtains more real skin deformation while ensuring the instantaneity.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI +1
Repair of defects or lesions in cartilage and bone using a chondro-regulative matrix
InactiveUS20110184381A1Promote healingInduce the repair of lesions in cartilage and boneBiocidePowder deliveryProgenitorMatrix method
Methods and compositions are provided for the treatment and repair of defect in the cartilage in partial- or full-thickness defects in joints of animals, in particular humans. To induce cartilage formation, a defect in cartilage is filled with layers of thin flaps of synovium or of peritendineum, which contains chondro- and osteo-progenitor cells, with interposed layers of a matrix. The matrix contains a chondrogenic factor, which induces chondrogenesis of chondroprogenitor cells in the flaps, and an anti-hypertrophic agent, which arrest differentiation of chondrocytes in an early phase, in an appropriate delivery system. The matrix filling the bone area of a full-thickness defect may contain an osteogenic factor, which induces osteogenesis of osteoprogenitor cells. The layer of a flap between cartilage and bone areas may work as a barrier, which prevents blood vessels and associated cells from penetrating from the bone area into the cartilage area. To promote the induction of chondro- and osteo-genesis of the progenitor cells in the flaps of synovium or peritendineum effectively, the flaps may be treated with enzymes, e.g., matrix metalloproteinases or be punched by a needle before filling a defect.
Owner:UNIVERSITY OF BERN
Figure segmentation method based on depth map
InactiveCN105787938AEliminate noise interferenceEfficient removalImage enhancementImage analysisHuman bodyColor image
The present invention discloses a figure segmentation method based on a depth map. The method comprises the concrete steps: (1), collecting a skeleton graph, a color image and a depth map at the same time through adoption of a Kinect sensor, and finding out a human body bone area; (2) mapping node coordinates of the skeleton graph area into the depth map, finding out a minimum rectangular area including all the skeleton nodes, and determining the initial figure area in the depth map; (3) performing area iteration expansion of the initial figure area based on the depth information, and obtaining a final rectangular area including a complete figure object; and (4) taking the rectangular area including the complete figure object as a seed area, designing an energy function according to the depth information and the color information of the image pixels, and obtaining a final figure object segmentation result through adoption of a modulated GrabCut algorithm. The figure segmentation method based on a depth map is able to obtain a rectangular area including a whole figure object through adoption of depth information to obtain an accurate and complete figure object segmentation result.
Owner:SHANGHAI UNIV
Method for designing a bone morphology based hip system
A method of designing a group of femoral implants from three-dimensional images of femurs from a patient population greater than 100. A boundary between cortical and cancellous bone is defined in each of the images. A longitudinal axis of the femur is defined centered within the boundary. The width of the boundary is measured in a direction perpendicular to the axis at multiple cross-sections along the longitudinal axis spaced less than 20 mm. At least five (5) different size implants for implantation in a noncortical bone area of the femur are designed based on the measured widths. At least one area of the proximal femoral component boundary is designed where the implant outer surface is sized to be within 2 mm of the cortical bone. The proximal dimensions of the at least five implants are sized to provide the fit within 2 mm in 95% of the femurs from the population.
Owner:HOWMEDICA OSTEONICS CORP
Jawbone repair support and manufacture method thereof
The invention relates to a jawbone repair support and a manufacture method thereof, which can meet the demand of shape repair of large-area jawbone defect and the like. The jawbone repair support hasthe effects of shape repair and function repair, thereby meeting the individual demands of patients. The invention is characterized in that: the jawbone repair support comprises a jawbone shape support body which is provided with a condylar area, a mandibular ramus area, a mandibular angle area, a mandibular grafting bone area and a bone connecting area, wherein the mandibular angle area and the mandibular grafting bone area are respectively provided with a through hole array structure, and the bone connecting area is provided with a countersink array structure.
Owner:北京吉马飞科技发展有限公司
Method For Measuring Trabecular Bone Parameters From MRI Images
Disclosed is a method for measuring trabecular bone parameters from MRI images, including: scanning an experimental group with a 3D MRI scanner; segmenting the MRI images to extract bone area and perform skeletonization of the bone area; detecting end-point, joint and branch voxels in the skeleton to analyze bone structure; and measuring trabecular bone parameters based on the result of the structural analysis. The method enables diagnosing osteoporosis.
Owner:KOREA BASIC SCI INST
Image processing apparatus and image processing method
ActiveUS20090010520A1Easy to displayImprove directionReconstruction from projectionCharacter and pattern recognitionImaging processingBone area
An image processing apparatus characterized by including a device which recognizes, in a bone part unit, a bone area extracted from a medical image and including a bone region constituted of several bone parts, a device which is used to select the bone region to be displayed, a device which is used to determine the bone parts corresponding to the selected bone region, a device which is used to determine a viewpoint and a sight line direction for observing the selected bone region, a device which generates a volume rendering image which displays the bone area with the viewpoint and the sight line direction, based on the bone area of the medical image recognized in the bone part unit, and the determined viewpoint and sight line direction, and a device which is used to conduct control to display the generated volume rendering image.
Owner:FUJIFILM CORP
Method and device for determining medullary cavity anatomical axis based on deep learning
ActiveCN111652888AImprove accuracyReduce failure rateImage enhancementImage analysisBone areaBone marrow cavity
The invention discloses a method and device for determining a medullary cavity anatomical axis based on deep learning, and the method comprises the steps: carrying out the segmentation of a two-dimensional cross section image according to a preset segmentation neural network, and obtaining a bone region corresponding to a medullary cavity through segmentation; performing layer classification on the bone area according to a preset classification neural network, and separating out a medullary cavity layer; determining central points of all medullary cavity layers according to a central point calculation formula; carrying out straight line fitting on the center point, and determining the medullary cavity anatomical axis. The invention aims to provide a high-precision medullary cavity anatomical axis determination mode.
Owner:BEI JING LONGWOOD VALLEY MEDICAL TECH CO LTD
Method and system for obtaining value of bone mineral density of human body
ActiveCN103892856AReduce manufacturing costEasy to collectRadiation diagnosticsImaging processingBone area
The invention is suitable for the technical field of medical image processing and applying, and provides a method and system for obtaining the value of the bone mineral density of the human body. The method includes the following steps: obtaining the high-low-energy image X ray injection strength, obtaining calibration parameters, collecting low-energy X ray images and high-energy X ray images of the bone area, preprocessing the collected images, receiving an interested area which is selected by a user and requires calculation of the value of the bone mineral density, locating an accurate area of the interested area which requires the calculation of the value of the bone mineral density, and calculating the value of the bone mineral density according to the Beer-Lambert law. By means of the method and system, dependence on hardware of a bone mineral density instrument can be reduced while the value of the bone mineral density is calculated; on the basis of a common digital X ray machine, the scheme of the method and system is applied, measurement and calculation of the bone mineral density of the human body can be achieved, the problem in the hardware is not required to be considered, and the production cost of the bone mineral density instrument is reduced to a certain degree. In addition, when the scheme is adopted for collecting the bone images, a standard body is not required, and the image collecting process is accordingly simplified.
Owner:SHENZHEN INST OF ADVANCED TECH
Application of nanofiber membrane in preparation of rotator cuff injury treatment material
InactiveCN104841022AGood adhesionPromote regenerationSurgeryArtifical filament manufactureFiberSide effect
The present invention provides application of a nanofiber membrane in preparation of a rotator cuff injury treatment material, the nanofiber membrane is an electrospinning fiber membrane to promote cell growth, the nanofiber membrane optimization preferably includes cytokines, a pharmaceutical excipient and a biodegradable polymer material, the mass ratio of cytokines to pharmaceutical excipient is (0.05-0.5) : (1000-10000), and the mass ratio of cytokines to biodegradable polymer material is (0.5-0.9) : (500-10000). The present invention provides a new use of the nanofiber membrane, the nanofiber membrane is used for preparation of the rotator cuff injury treatment material, the nanofiber membrane has good biocompatibility and biodegradability, can promote cell adhesion and regeneration, accelerates the remodeling of tendon bone area, promotes the healing of the tendon bone, can effectively promote the regeneration of the injured rotator cuff, is non-toxic, non-immunogenicity, and small in side effects, and has great significance in clinic.
Owner:赵金忠 +2
Human body part segmentation method and system based on SPECT imaging
ActiveCN112950595AAchieve precise segmentationSmall amount of calculationImage enhancementImage analysisHuman bodyChest cavity
The invention relates to a human body part segmentation method and system based on SPECT imaging, based on a bone imaging data matrix, a human body region is extracted from a bone imaging image to obtain effective information of the bone imaging data matrix, the calculation amount is reduced, and the segmentation precision is improved. Then the human body area is divided into a head area, a chest area, a pelvic bone area and a leg area based on the data matrix corresponding to the human body area and human morphological characteristics, then the chest area is divided into a trunk area, a left upper limb and a right upper limb based on the data matrix corresponding to the chest area, and finally based on the data matrix corresponding to the leg area, the leg area is divided into the left lower limb and the right lower limb, so that the human body is divided into the head, the trunk, the four limbs, the pelvis and other parts, accurate segmentation of the human body parts is achieved, and accurate segmentation of the head, the trunk, the four limbs, the pelvis and other parts can be effectively conducted on any SPCET bone imaging image.
Owner:NORTHWEST UNIVERSITY FOR NATIONALITIES
Novel maintaining implant system for prosthesis of cranio-maxillo facial
The invention discloses a novel maintaining implant system for a prosthesis of a cranio-maxillo facial. The novel maintaining implant system comprises an implant, a connector, a base station and an armature; wherein screw threads are arranged outside the implant, and a screw hole is formed in an upper center of the implant; a hole is formed in the center of the connector, a groove is formed in the upper part of the connector, and screw holes are formed in ear blocks on two sides of the groove; a bulge matched with the groove of the connector is arranged in the lower part of the base station, a hole is formed in the bulge, and a screw hole is formed in the upper center of the base station; the armature is of a cylindrical shape, a screw stem is arranged in the lower center, and the screw stem is matched with the screw hole in the upper part of the base station; and the connector is connected with the implant and the base station through screws, and the armature is arranged on the base station through the screw stem. The novel maintaining implant system can be obliquely planted into a bone area with an abundant bone amount in vicinity, thus the planting length of the implant can be increased, the maintenance of the implant is enabled to be more stable, and the dropping of the implant is effectively avoided; meanwhile the problem of insufficient side maintaining force due to parallelism of a magnetic attaching article of each implant for a prosthesis of an ear and a nose can be solved at the same time; and the problems of possible occurrence of inside-calvarium damage and the like caused by planting of maintaining implant of an ear prosthesis are prevented, and long-term stability of the implant is guaranteed.
Owner:成都世联康健生物科技有限公司
Preparation method and application of silk bracket, and three-phase silk ligament graft and preparation method thereof
InactiveCN103505761AIncrease insertion strengthImprove biomechanical performanceProsthesisStress concentrationBone area
The invention discloses a preparation method and application of a silk bracket, and a three-phase silk ligament graft and a preparation method thereof. Silks are woven into a net-shaped bracket with a macroporous structure; the bracket is divided into three areas: a ligament area, a cartilage area and a bone area; mesenchymal stem cells, mesenchymal stem cells carrying with TGF-beta gene lentiviral transfection and mesenchymal stem cells carrying with BMP-2 gene lentiviral transfection are respectively planted in the three areas; the net-shaped bracket modified by the divided areas is rolled to form a bionic ligament graft with a physiological transition structure. The method avoids the problem of stress concentration due to direct connection of the soft and hard tissues; the planting gene-modified mesenchymal stem cells have excellent directional differentiation features, so that the cultivating time and steps of planting a plurality of different cells are saved, and the problem of weak biological fixation of the ligament graft-bone combination part in the existing single-phase tissue engineering ligament and the problem of the traditional method incapable of enabling the cells to grow deeply are solved.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Novel maintaining implant system for prosthesis of cranio-maxillo facial
Owner:成都世联康健生物科技有限公司
Method and system for inhibiting bone shadows in digital X ray chest radiograph
ActiveCN105469365AAchieve inhibitionKeep the detail structureImage enhancementImage analysisDual energy subtractionImaging processing
The invention is suitable for the field of image processing and provides a method for inhibiting bone shadows in a digital X ray chest radiograph. The method comprises the steps of: A, receiving an input chest radiograph, and determining a central line of each bone area in the chest radiograph; B, according to the central lines of the bone areas, carrying out bone gray section line sampling and recording coordinates of sampling points, and obtaining a bone gray section image by the sampled bone gray section lines; and C, according to the coordinates of sampling points and the bone gray section image, obtaining a bone shadow image, and then according to the chest radiograph and the bone shadow image, obtaining bone shadow inhibited image. According to the invention, an X ray dual energy subtraction device is not needed, and modeling learning using a dual energy subtraction image is not needed, the single general ray chest radiograph is processed, and bone shadow inhibition is realized for the chest radiograph; and furthermore, a smooth and curved surface fitting technology is utilized to estimate the bone shadow gray, and detailed structures in the input X ray chest radiograph can be effectively maintained.
Owner:深圳市深图医学影像设备有限公司
Positioning guide plate for removing unerupted supernumerary teeth in anterior tooth area, and manufacturing method thereof
The invention discloses a positioning guide plate for removing unerupted supernumerary teeth in an anterior tooth area, and a manufacturing method thereof. A mucous membrane positioning guide plate and a boning positioning piece are detachably arranged, and can be conveniently used in a matching manner, a positioning ring for guiding the route of a boning device is arranged on the inner side surface of the boning positioning piece, the inner side surface of the positioning ring is a boning guide surface, and the boning guide surface is provided with a preset boning direction and the height ofthe positioning ring for guiding the boning depth of a machine needle. By means of the device, accurate incision positioning can be conducted on the unerupted supernumerary teeth, meanwhile, through the design of the positioning guide plate, the deboning area, depth and angle are accurately guided, incision and deboning are conducted in a small range, it is avoided that important permanent teeth and normal teeth are damaged due to positioning errors, and the supernumerary teeth are smoothly exposed.
Owner:温州医科大学附属口腔医院
Image processing apparatus and image processing method
ActiveUS8086013B2Easy to displayEasy to operateReconstruction from projectionCharacter and pattern recognitionBone areaComputer science
Owner:FUJIFILM CORP
Carpal bone region segmentation method based on shape information
ActiveCN110782470AAccurate segmentationIncrease scan rateImage enhancementImage analysisBone areaComputer vision
A carpal bone region segmentation method based on shape information comprises the following steps: preprocessing X-ray images in sequence by adopting star median filtering and grayscale image binarization methods; determining the vertical coordinate position of the upper boundary of the carpal bone area by using a bidirectional iterative scanning algorithm according to the distribution characteristics of the carpal bone area; according to the wrist joint shape information, calculating gradient changes of edges on two sides of a wrist, and determining vertical coordinate positions of left and right candidate points of a lower boundary; integrating the upper boundary, the left candidate point, the right candidate point and the carpal bone area information, optimizing and correcting the coordinate position, and cutting the carpal bone area according to the obtained coordinates of the upper left corner and the lower right corner. According to the method, the carpal bone area in the wrist image is accurately segmented; when the upper boundary is determined, a bidirectional iterative scanning algorithm is adopted, so that the scanning rate is greatly improved; when the lower boundary isdetermined, the situation of the left boundary point and the right boundary point is considered at the same time, optimization selection is performed, and the influence of different palm joint positions on the positioning accuracy is weakened.
Owner:ZHEJIANG UNIV OF TECH
Orthopedic bonding agent application tool
Owner:TIPIRNENI SOFTWARE LLC
Method for automatically identifying bone age image after digital processing
PendingCN112862749AEfficient identificationImprove real-time performanceImage enhancementImage analysisBone areaBone age
The invention discloses a method for automatically identifying a bone age image after digital processing, which comprises the steps of image collection, image preprocessing, target prediction and result reporting, and is characterized in that according to a bone development grade standard of a CHN method, 14 target bone areas of an image sample are respectively marked by using an image marking tool in the target prediction; a bone grade identification model trained through deep learning is adopted to position, segment and classify 14 target bone areas, then according to physiological data of a testee and according to a score table of bone development stages of a CHN method, bone grades of all the target bone areas are converted into different scores and accumulated, and the scores of all the target bone areas are obtained. And finally, the corresponding bone age is calculated according to the comparison table of the bone development maturing score and the bone age of the CHN method, so that the problems of long time consumption and low precision of bone age film reading are solved, and favorable support is provided for rapid evaluation of the bone age.
Owner:浙江康体汇科技有限公司
Image processing method, device and equipment and readable storage medium
ActiveCN113160248AReduce noisy dataImprove accuracyImage enhancementImage analysisSpinal columnImaging processing
The invention provides an image processing method, device and equipment and a readable storage medium, and relates to the field of medical image processing, and the method comprises the steps: obtaining an initial image, and carrying out the preprocessing of the initial image, and generating new data; segmenting the initial image by adopting a first preset threshold value and a second preset threshold value to obtain a first segmentation result and a second segmentation result; performing fitting according to the first segmentation result to obtain backbone shell data; positioning a chest layer based on the backbone shell data to obtain chest data; calculating to obtain rib and sternum data according to the second segmentation result and the chest data, and generating rib and sternum mask data; positioning a spine bone area based on the backbone shell data, extracting spine bone data in the spine bone area based on the first segmentation result and the second segmentation result, and generating spine bone mask data; and removing rib and sternum mask data and spinal bone mask data from the initial image to obtain a target image, thereby solving the problem that an efficient and rapid automatic deboning method is lacked in the angiocardiographic image.
Owner:浙江明峰智能医疗科技有限公司
Bionic repair method for bone tumors
ActiveCN110008506AGood biocompatibilityImprove mechanical propertiesImage enhancementImage analysisFree formComputer aid
The invention discloses a bionic repair method for bone tumors, and belongs to the computer-aided biomedical engineering, and the method comprises the steps: carrying out segmentation with semantic characteristics on tumor image data of a patient, accurately segmenting and extracting an area corresponding to a target bone tissue, and realizing accurate reconstruction of a segmentation result basedon an envelope and approximation bone surface model three-dimensional reconstruction algorithm; constructing a bionic constraint set and a recovery framework for bone loss caused by bone tumors according to biomedical characteristics of a bone system, realizing accurate recovery of a bone loss form, and designing a constrained free form internal fixation prosthesis based on a bone loss form recovery result; designing an internal bionic porous scaffold structure with good mechanical property and machinability according to the information characteristics of the classified bone area and in combination with a skeleton kinematic mechanical analysis result; and finally, generating an integrated implant prosthesis through fusion, so that a personalized and accurate bone tumor repair system is realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
Bone detection device and bone detection method
ActiveCN105193454AImprove efficiencyImprove accuracyOrgan movement/changes detectionUltrasonic/sonic/infrasonic dianostic techniquesBone densityBone area
The invention provides a bone detection device and a bone detection method. The bone detection device includes a transmitter, a receiver and a processor, wherein the transmitter is used for transmitting ultrasonic signals to a bone area; the receiver is used for receiving ultrasonic signals propagated from the bone area; the processor is used for calculating the included angle Phi between the detection surface, associated with the transmitter and the receiver, and the bone surface of the bone area at least based on the propagation time of the ultrasonic signals from the transmitter to the receiver. According to the bone detection device and bone detection method, provided by the invention, the included angle between the detection surface and the bone surface can be calculated and provided in a real-time manner, so that an operator of the bone detection device can know the included angle timely and adjust the detection surface according to the included angle, and the improvement of the efficiency and correctness of the bone mineral density detection is facilitated.
Owner:BEIJING CHIOY MEDICAL TECH CO LTD
Bone mineral density-measuring device
The purpose of the invention is to display bone mineral density and the measured values on which same is based in a form that is suitable for bone diagnoses. The bone mineral density-measuring device acquires bone mineral distribution data wherein the three-dimensional distribution of bone minerals is projected onto a plane based on X-rays passing through the subject. The bone mineral density-measuring device determines bone mineral content, bone area and bone mineral density based on the bone mineral distribution data and displays the determined bone mineral content, bone area and bone mineral density on a display. Bones that are subjects for diagnosis are, for example, the second, third and fourth lumbar vertebrae. On the display, an image showing the bone mineral densities (D2 - D4), bone areas (S2 - S4) and the bone mineral contents (C2 - C4) of the second - fourth lumbar vertebrae on the vertical axis and the examination times on the horizontal axis is displayed.
Owner:HITACHI HEALTHCARE MFG LTD
Method for bone formation by administering poly(lactic-co-glycolic acid) cross-linked alendronate
A method for bone regeneration which comprises administering a short term release composition into a bone area of a subject in need thereof, wherein the composition comprises a poly(lactic-co-glycolic acid) cross-linked alendronate (PLGA-ALN), wherein the composition releases the alendronate into the bone area, wherein the bone tissue of the bone area is exposed in situ to a therapeutically effective amount of the alendronate over 9 days.
Owner:KAOHSIUNG MEDICAL UNIVERSITY
A method and system for suppressing skeletal shadows in digital chest X-ray images
ActiveCN105469365BAchieve inhibitionKeep the detail structureImage enhancementImage analysisDual energy subtractionImaging processing
Owner:深圳市深图医学影像设备有限公司
Skin deformation method of 3D animation character model based on geometric deformation
ActiveCN103679783BOvercome the disadvantages of prone to distortionImprove production efficiencyAnimationDeformation effectBone area
The invention relates to a geometric deformation based skin deformation method for a three-dimensional animated character model. The method comprises the steps that according to the skeleton structure of an initial character model, the initial character model is divided into joint areas and bone areas, and deformation control points among the bone areas are calibrated manually; according to the body zoom parameters set by a user and the calibrated deformation control points, geometric deformation is implemented on the bone areas of the initial character model based on a free deformation technology; after the geometric deformation, influence of joints on apexes is adjusted; and according to the influence of the joints on the apexes of the joint and bone areas, the character model is driven to make translational and rotary movement via a dual-quaternion method to generate vivid and lifelike skin deformation effect. The skin deformation method of the invention can overcome the defects as collapse and shape explosion caused by large moving amplitude of the model, and obtains more real skin deformation while ensuring the instantaneity.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI +1
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