Patents by Inventor Qinping Zhao
Qinping Zhao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170178402Abstract: The invention provides a line guided 3D model reshaping method, including: 1. extracting a contour of an object from an image, and selecting a contour or main skeleton to create a 2D line database; 2. extracting a 3D editable line, retrieving and suggesting an appropriate 2D contour or skeleton from 2D line database; 3. establishing point-to-point correspondence by matching 2D contour or skeleton to 3D editable line, and reshaping the model using parametric deformation method. By the method, 2D contour or skeleton appropriate for 3D model editable line is automatically suggested from 2D line database of multiple classes of objects to guide 3D model reshaping, and fewer user interactions are required in extracting from input 3D model editable lines such as axes, cross-sections and outlines and producing various types of reshaped models by using parametric deformation method, thereby helping user to design desirable 3D model with speed and ease.Type: ApplicationFiled: October 28, 2016Publication date: June 22, 2017Inventors: XIAOWU CHEN, QIANG FU, QINPING ZHAO, XIAOYU SU
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Publication number: 20170134701Abstract: The invention provides a light field illuminating method, device and system. The method includes: determining, based on position and angle of rays emitted from a projector and focal length of a lens, position and angle of projection rays obtained after the emitted rays being transmitted through a lens array; determining, based on position and angle of projection rays and light probe array of sampled scene, brightness value of projection rays; converting, based on brightness transfer function of projector, brightness value of projection rays into pixel value of projection input image, generating projection input image based on pixel value of projected input image; and performing light field illumination on target object with projection input image. A projector and a lens array are adopted to achieve light field illumination, so that pixel-level accurate lighting control can be achieved, and various complicated light field environments can be simulated vividly in practical scenario.Type: ApplicationFiled: January 26, 2016Publication date: May 11, 2017Inventors: Qinping ZHAO, Zhong ZHOU, Tao YU, Chang XING
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Patent number: 9613424Abstract: A method of constructing 3D clothing model based on single image, estimating a 3D model of human body of an inputted image and constructing 3D clothing plane according to the clothing silhouette of the inputted image. The method includes utilizing the 3D clothing plane and the 3D model of human body to generate a smooth 3D clothing model through a deformation algorithm. A decomposition algorithm of intrinsic image is utilized along with a shape-from-shading algorithm to acquire a set of detail information of clothing from the inputted image. A weighted Laplace editing algorithm is utilized to shift the acquired detail information of clothing to the smooth 3D clothing model to yield a final 3D clothing model. A 3D clothing model is used to generate the surface geometry details including folds, wrinkles.Type: GrantFiled: January 7, 2016Date of Patent: April 4, 2017Assignee: BEIHANG UNIVERSITYInventors: Xiaowu Chen, Qiang Fu, Qinping Zhao, Bin Zhou, Kan Guo
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Patent number: 9578312Abstract: A method of integrating binocular stereo video scenes with maintaining time consistency includes: propagating and extracting a contour of moving object of stereo video A; integrating and deformating of parallax between moving object and dynamic scene with time consistency; color blending of moving object and dynamic scene with time consistency where a method of median coordinate fusion is utilized. The method is simple and effective to utilize a small quantity of user interactions to successfully extract moving objects from stereo video which are same in time and as consistent as possible between left view and right view to develop multiple constraint conditions to guide the integration and deformation of parallax of moving object and dynamic scene and allow moving object to conform to the rules of perspective of dynamic scene. Moreover, the deformation result of moving object is smooth and consistent and can avoid effectively the occurrence of “dithering” phenomenon.Type: GrantFiled: July 28, 2014Date of Patent: February 21, 2017Assignee: BEIHANG UNIVERSITYInventors: Xiaowu Chen, Dongqing Zou, Qinping Zhao, Feng Ding
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Publication number: 20170018117Abstract: The present invention provides a method and a system for generating a three-dimensional garment model, where garment component composition information and attribute information corresponding to each garment component are acquired by acquiring and processing RGBD data of a dressed human body, and then a three-dimensional garment component model corresponding to the attribute information of each garment component is selected in a three-dimensional garment component model library, that is, a three-dimensional garment model can be constructed rapidly and automatically only with RGBD data of a dressed human body, and human interactions are not necessary during the process of construction, thus the efficiency of a three-dimensional garment modeling is improved, and it has significant meaning for the development of computer-aided design, three-dimensional garment modeling and virtual garment fitting technology.Type: ApplicationFiled: March 7, 2016Publication date: January 19, 2017Inventors: XIAOWU CHEN, BIN ZHOU, QINPING ZHAO, FEIXIANG LU, LIN WANG, LANG BI
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Publication number: 20160379371Abstract: The present invention provides a method for object segmentation in videos tagged with semantic labels, including: detecting each frame of a video sequence with an object bounding box detector from a given semantic category and an object contour detector, and obtaining a candidate object bounding box set and a candidate object contour set for each frame of the input video; building a joint assignment model for the candidate object bounding box set and the candidate object contour set and solving the model to obtain the initial object segment sequence; processing the initial object segment, to estimate a probability distribution of the object shapes; and optimizing the initial object segment sequence with a variant of graph cut algorithm that integrates the shape probability distribution, to obtain an optimal segment sequence.Type: ApplicationFiled: March 29, 2016Publication date: December 29, 2016Inventors: XIAOWU CHEN, YU ZHANG, JIA LI, QINPING ZHAO, CHEN WANG, CHANGQUN XIA
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Patent number: 9384781Abstract: This invention provides a method of sparse representation of contents of high-resolution video images which supports content editing and propagation. It mainly comprises five steps which are: (1) to input the original images or videos of high resolution to summarize the characteristic information of their pixels; (2) to acquire the highly sparse samples of the original images or videos through the sparse representation technique; (3) to reconstruct each pixel of the input images or videos with a small number of the original sparse samples to calculate a coefficient of reconstruction; (4) to edit and propagate the original sparse samples to yield a result of new sparse samples; (5) to generate a result of final images or videos of high resolution according to the result of sparse samples and the coefficient of reconstruction. This invention only edits and propagates the highly sparse samples rather than all the information of pixels.Type: GrantFiled: July 16, 2014Date of Patent: July 5, 2016Assignee: BEIHANG UNIVERSITYInventors: Xiaowu Chen, Dongqing Zou, Qinping Zhao, Jianwei Li
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Publication number: 20160155262Abstract: A method of constructing 3D clothing model based on single image, estimating a 3D model of human body of an inputted image and constructing 3D clothing plane according to the clothing silhouette of the inputted image. The method includes utilizing the 3D clothing plane and the 3D model of human body to generate a smooth 3D clothing model through a deformation algorithm. A decomposition algorithm of intrinsic image is utilized along with a shape-from-shading algorithm to acquire a set of detail information of clothing from the inputted image. A weighted Laplace editing algorithm is utilized to shift the acquired detail information of clothing to the smooth 3D clothing model to yield a final 3D clothing model. A 3D clothing model is used to generate the surface geometry details including folds, wrinkles.Type: ApplicationFiled: January 7, 2016Publication date: June 2, 2016Inventors: Xiaowu CHEN, Qiang FU, Qinping ZHAO, Bin ZHOU, Kan GUO
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Patent number: 9355328Abstract: The present invention discloses an image foreground matting method based on neighborhood and non-neighborhood smoothness priors. The method primarily comprises the steps of: interactively marking foreground points and background points; initializing ? values of each unmarked pixel of the input image by a color sampling method, calculating confidence degree of the pixel, and admitting ? values of pixels of which confidence degree is larger than a given threshold as known pixels; calculating data term weights, neighborhood smoothness constraint term weights and non-neighborhood smoothness constraint term weights of each pixel in the input image to construct graph patterns of all pixels of the input image; and according to ? values of the known pixels, under the constraint of the graph patterns, solving probabilities that each pixel belongs to the foreground by minimizing the energy equation so as to obtain alpha mattes.Type: GrantFiled: April 24, 2013Date of Patent: May 31, 2016Assignee: Beihang UniversityInventors: Xiaowu Chen, Dongqing Zou, Qinping Zhao, Feng Ding
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Publication number: 20150220805Abstract: The present invention discloses an image foreground matting method based on neighborhood and non-neighborhood smoothness priors. The method primarily comprises the steps of: interactively marking foreground points and background points; initializing ? values of each unmarked pixel of the input image by a color sampling method, calculating confidence degree of the pixel, and admitting ? values of pixels of which confidence degree is larger than a given threshold as known pixels; calculating data term weights, neighborhood smoothness constraint term weights and non-neighborhood smoothness constraint term weights of each pixel in the input image to construct graph patterns of all pixels of the input image; and according to a values of the known pixels, under the constraint of the graph patterns, solving probabilities that each pixel belongs to the foreground by minimizing the energy equation so as to obtain alpha mattes.Type: ApplicationFiled: April 24, 2013Publication date: August 6, 2015Inventors: Xiaowu Chen, Dongqing Zou, Qinping Zhao, Feng Ding
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Publication number: 20150195510Abstract: A method of integrating binocular stereo video scenes with maintaining time consistency includes: propagating and extracting a contour of moving object of stereo video A; integrating and deformating of parallax between moving object and dynamic scene with time consistency; color blending of moving object and dynamic scene with time consistency where a method of median coordinate fusion is utilized. The method is simple and effective to utilize a small quantity of user interactions to successfully extract moving objects from stereo video which are same in time and as consistent as possible between left view and right view to develop multiple constraint conditions to guide the integration and deformation of parallax of moving object and dynamic scene and allow moving object to conform to the rules of perspective of dynamic scene. Moreover, the deformation result of moving object is smooth and consistent and can avoid effectively the occurrence of “dithering” phenomenon.Type: ApplicationFiled: July 28, 2014Publication date: July 9, 2015Inventors: Xiaowu CHEN, Dongqing ZOU, Qinping ZHAO, Feng DING
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Patent number: 9036860Abstract: The invention discloses a method for editing propagation of video and image content based on local feature structure preservation, comprising: mapping all pixels in the input original image and/or video key frames to a selected feature space; finding K nearest neighbor pixels for each pixel according to feature vectors' Euclidean distance in the selected feature space; using Locally Linear Embedding (LLE) dimension reduction to construct the locally linear relationship between each pixel and its K nearest neighbor pixels in the selected feature space; According to the present invention, it is possible to accurately perform such image or video processing as automatic color transformation, interactive color editing, gray image colorization, video cloning and image matting.Type: GrantFiled: December 4, 2012Date of Patent: May 19, 2015Assignee: Beihang UniversityInventors: Xiaowu Chen, Dongqing Zou, Qinping Zhao, Jianwei Li, Feng Ding
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Publication number: 20150084955Abstract: A method of constructing 3D clothing model based on single image, estimating a 3D model of human body of an inputted image and constructing 3D clothing plane according to the clothing silhouette of the inputted image. The method includes utilizing the 3D clothing plane and the 3D model of human body to generate a smooth 3D clothing model through a deformation algorithm. A decomposition algorithm of intrinsic image is utilized along with a shape-from-shading algorithm to acquire a set of detail information of clothing from the inputted image. A weighted Laplace editing algorithm is utilized to shift the acquired detail information of clothing to the smooth 3D clothing model to yield a final 3D clothing model. A 3D clothing model is used to generate the surface geometry details including folds, wrinkles.Type: ApplicationFiled: July 28, 2014Publication date: March 26, 2015Inventors: Xiaowu CHEN, Qiang FU, Qinping ZHAO, Bin ZOU, Kan GUO
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Publication number: 20150030312Abstract: This invention provides a method of sparse representation of contents of high-resolution video images which supports content editing and propagation. It mainly comprises five steps which are: (1) to input the original images or videos of high resolution to summarize the characteristic information of their pixels; (2) to acquire the highly sparse samples of the original images or videos through the sparse representation technique; (3) to reconstruct each pixel of the input images or videos with a small number of the original sparse samples to calculate a coefficient of reconstruction; (4) to edit and propagate the original sparse samples to yield a result of new sparse samples; (5) to generate a result of final images or videos of high resolution according to the result of sparse samples and the coefficient of reconstruction. This invention only edits and propagates the highly sparse samples rather than all the information of pixels.Type: ApplicationFiled: July 16, 2014Publication date: January 29, 2015Inventors: Xiaowu CHEN, Dongqing ZHOU, Qinping ZHAO, Jianwei LI
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Publication number: 20140071347Abstract: The invention discloses a method for editing propagation of video and image content based on local feature structure preservation, comprising: mapping all pixels in the input original image and/or video key frames to a selected feature space; finding K nearest neighbor pixels for each pixel according to feature vectors' Euclidean distance in the selected feature space; using Locally Linear Embedding (LLE) dimension reduction to construct the locally linear relationship between each pixel and its K nearest neighbor pixels in the selected feature space; According to the present invention, it is possible to accurately perform such image or video processing as automatic color transformation, interactive color editing, gray image colorization, video cloning and image matting.Type: ApplicationFiled: December 4, 2012Publication date: March 13, 2014Applicant: BEIHANG UNIVERSITYInventors: Xiaowu Chen, Dongqing Zou, Qinping Zhao, Jianwei Li, Feng Ding
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Publication number: 20120096705Abstract: A process tray for head stack assembly includes a main tray and at least one jig. Each jig has a main body with one set of locating holes formed thereon and two elastic arms respectively extending from two sides of the main body for providing force to hold the head stack assembly. The main tray has a main frame and a supporting frame disposed within and connected to the main frame for supporting the jig and/or the head stack assembly. The supporting frame has at least one set of locating bumps formed thereon for locating at least one jig on the main tray by respectively inserting the locating bumps into the locating holes formed on the jig. The process tray of the present invention can carry the head stack assembly during the whole head stack assembly manufacturing process, thereby simplifying the HSA manufacturing process, increasing productive efficiency and reducing the cost.Type: ApplicationFiled: January 7, 2011Publication date: April 26, 2012Applicant: SAE Magnetics (H.K.) Ltd.Inventors: Shujin Jiang, Qinping Zhao
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Patent number: 7730604Abstract: A method for assembling a disk drive includes providing a head stack assembly (HSA), providing a shipping comb for assembling the disk drive, inserting a comb pin of the shipping comb into a locating holes in a HSA to assemble the shipping comb with the HSA together, positioning the HSA and shipping comb on a base cover of the disk drive, installing the HSA on the base cover via a bearing device thereof, rotating the assembled HSA and shipping comb to park the HSA on the ramp and aligning the comb pin with the securing hole, pushing the comb pin into a securing hole to lock the HSA in the base cover, assembling a latch device and a top voice coil magnet on the base cover, and rotating out the shipping comb to a position where the shipping comb is not interfered with the disk drive.Type: GrantFiled: December 19, 2008Date of Patent: June 8, 2010Assignee: SAE Magnetics (H.K.) Ltd.Inventors: Ho Yiusing, Canhua Chen, Qinping Zhao, Shenghe Yang
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Publication number: 20090119907Abstract: The invention discloses a method for assembling a disk drive including steps that providing a head stack assembly (HSA), providing a shipping comb for assembling the disk drive, inserting a comb pin of the shipping comb into a locating holes in a HSA to assemble the shipping comb with the HSA together, positioning the HSA and shipping comb on a base cover of the disk drive, installing the HSA on the base cover via a bearing device thereof, rotating the assembled HSA and shipping comb to park the HSA on the ramp and aligning the comb pin with the securing hole, pushing the comb pin into a securing hole to lock the HSA in the base cover, assembling a latch device and a top voice coil magnet on the base cover, rotating out the shipping comb to a position where the shipping comb is not interfered with the disk drive.Type: ApplicationFiled: December 19, 2008Publication date: May 14, 2009Applicant: SAE Magnetics (H.K.) Ltd.Inventors: Yiusing Ho, Canhua Chen, Qinping Zhao, Shenghe Yang
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Patent number: 7487582Abstract: In certain example embodiments, a shipping comb for assembling a disk drive is provided. The shipping comb has a comb block which includes a locking portion having a comb pin hole formed therein, at least one spacer, and a connecting beam to connect the locking portion and the at least one spacer. A comb pin is received in the comb pin hole of the locking portion. The comb pin includes at least two engaging portions. A controlling system has a comb latch selectively engagable with the at least two engaging portions so as to control the comb pin to move in the comb pin hole. In certain example embodiments, a method for assembling a disk drive using the shipping comb is provided.Type: GrantFiled: May 4, 2006Date of Patent: February 10, 2009Assignee: SAE Magnetics (H.K.) Ltd.Inventors: Yiusing Ho, Canhua Chen, Qinping Zhao, Shenghe Yang
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Publication number: 20070256295Abstract: A shipping comb for assembling a disk drive comprises: a comb block, wherein the comb block comprises a locking portion having a comb pin hole forming therein, at least one spacer and a connecting beam to connect the locking portion and the at least one spacer; a comb pin received in the comb pin hole of the locking portion; and a controlling system to engage with and control the comb pin to move in the comb pin hole. The invention also discloses a method for assembling a disk drive using the shipping comb.Type: ApplicationFiled: May 4, 2006Publication date: November 8, 2007Applicant: SAE Magnetics (H.K.) Ltd.Inventors: Yiusing Ho, Canhua Chen, Qinping Zhao, Shenghe Yang