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11.发明申请公开(公告)号：US20200167578A1
公开(公告)日：2020-05-28
申请号：US16616962
申请日：2018-05-23
Applicant: BOE Technology Group Co., Ltd.
Inventor： Hongli Ding , Xiaojun Tang
Abstract: The present application provides an object tracking method. The object tracking method includes obtaining an image of an area in front of a vehicle; dividing the image of the area in the front of the vehicle into a plurality of sub-images; determining a plurality of first sub-images that satisfy a plurality of threshold conditions out of the plurality of sub-images; selecting a plurality of target sub-images out of the plurality of first sub-images, at least one of the plurality of first sub-images is not selected as one of the plurality of target sub-images; and recognizing a target object in one of the plurality of target sub-images.
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12.发明申请公开(公告)号：US20190306383A1
公开(公告)日：2019-10-03
申请号：US16107188
申请日：2018-08-21
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Xiangyang Liu , Naifu Wu , Xiaojun Tang
Abstract: A method of correcting image distortion of an optical device in a display device and a display device are provided. The method includes: generating a plurality of pre-distorted images having different correcting values based on a same reference image; inputting each of the pre-distorted images into the optical device respectively to generate a plurality of display images in one-to-one correspondence to the plurality of pre-distorted images; comparing each of the display images with the reference image respectively, to obtain a display image having a distortion value smaller than a first threshold with respect to the reference image, and determining a correcting value of a pre-distorted image corresponding to this display image as a distortion value of the display device; and correcting the image distortion of the optical device depending on the distortion value of the optical device.
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13.发明申请公开(公告)号：US20220383544A1
公开(公告)日：2022-12-01
申请号：US17761183
申请日：2021-05-31
Applicant: BOE Technology Group Co., Ltd.
Inventor： Jingru Wang , Xiaojun Tang , Guangli Wang
Abstract: A distance measurement method is provided. The distance measurement method includes obtaining an image of a target device, the image of the target device including a target object of a first color and a background object of a second color, the first color being different from the second color; processing the image of the target device to obtain a processed image, the processed image including a processed target object of a third color and a processed background object of a fourth color; detecting a contour of the processed target object of the third color; calculating an area encircled by the contour; and calculating a distance between a camera and the target device upon determination of the area encircled by the contour.
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公开(公告)号：US11508157B2
公开(公告)日：2022-11-22
申请号：US16066799
申请日：2017-10-24
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Haijun Su , Xiaojun Tang
IPC: G06K9/00 , G06N20/20 , B60W30/08 , G05B13/02 , G06K9/46 , G06K9/62 , G06T3/40 , G06V20/58 , G06V10/40 , G06V40/10
Abstract: The disclosure provides an objective identification device, comprising: a classifier training circuit configured to extract objective characteristics based on training samples and perform offline training based on the objective characteristics to obtain a classifier; and a calculation circuit is configured to identify an objective in an image based on a particle swarm optimization algorithm, wherein each of particles is defined as an object having a predefined size in the image; and a fitness value of each of particles is calculated based on the classifier and the objective characteristics of the particle in the particle swarm optimization algorithm, the fitness value representing a probability that the particle belongs to the objective. The disclosure also provides an objective identification method and driving assistance device. According to the disclosure, not only the identification rate can be increased but also application scenarios having different identification rate requirements can be satisfied.
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公开(公告)号：US11276178B2
公开(公告)日：2022-03-15
申请号：US16641830
申请日：2019-08-01
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Huanhuan Zhang , Tong Liu , Xiaojun Tang , Yifei Zhang , Zhiguo Zhang
Abstract: The present disclosure provides a line segment detection method, apparatus, device, and a computer-readable storage medium. Said method includes: extracting image features of an image to be processed, the image features including an image gradient angle and an image gradient amplitude; determining a plurality of seed points based on the extracted image features; for each seed point of the plurality of seed points, determining a current connected region of respective seed point according to a region growth rule, wherein the region growth rule needs to satisfy both a gradient amplitude growth rule and a gradient angle growth rule simultaneously; and performing line segment fitting on line segments within the current connected region of respective seed point.
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Patent Agency Ranking
公开(公告)号：US20210334932A1
公开(公告)日：2021-10-28
申请号：US16626564
申请日：2019-03-15
Applicant: BOE Technology Group Co., Ltd.
Inventor： Xiaojun Tang
IPC: G06T1/00
Abstract: A method of encoding a watermark into a digital image is provided. The method includes partitioning an image into a plurality of blocks of a same size; accumulating the plurality of blocks of the same size into a single block image; performing a Fourier transformation on the single block image to obtain a two-dimensional Fourier spectrum defined by Fourier coefficients at different positions of a Fourier domain; inserting a watermark into a frequency domain of the two-dimensional Fourier spectrum by modifying the two-dimensional Fourier spectrum as a function of watermarking coefficients in the watermark, to obtain a modified Fourier spectrum; performing an inverse Fourier transformation on the modified Fourier spectrum to obtain a watermarked image; copying the watermarked image horizontally and vertically into a plurality of copied watermarked images; and splicing the plurality of copied watermarked images into a reconstituted watermark image.
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公开(公告)号：US20210334555A1
公开(公告)日：2021-10-28
申请号：US16332906
申请日：2018-06-13
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Ran Duan , Xiaojun Tang
Abstract: A method for tracking an at least partially occluded object. The method includes recognizing a non-occluded portion of the at least partially occluded object in an input image; generating a simulated image of the at least partially occluded object based on features of the non-occluded portion extracted from the input image; determining first coordinates of the at least partially occluded object in a first coordinate system; and converting the first coordinates of the at least partially occluded object in the first coordinate system into second coordinates in a second coordinate system defined in a display apparatus.
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18.发明授权公开(公告)号：US10679364B2
公开(公告)日：2020-06-09
申请号：US15750977
申请日：2017-07-04
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Xiaojun Tang
Abstract: This application provides an image matching method, an image matching apparatus, an image matching system, and a storage medium, the image matching method includes: an extension step of extending an original reference image into one or more extended reference images, wherein the one or more extended reference images is obtained by deforming the original reference image; and an image matching step of image-matching a detected image with candidate reference images that include the original reference image and the one or more extended reference images.
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19.发明授权公开(公告)号：US10602032B2
公开(公告)日：2020-03-24
申请号：US16107188
申请日：2018-08-21
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Xiangyang Liu , Naifu Wu , Xiaojun Tang
Abstract: A method of correcting image distortion of an optical device in a display device and a display device are provided. The method includes: generating a plurality of pre-distorted images having different correcting values based on a same reference image; inputting each of the pre-distorted images into the optical device respectively to generate a plurality of display images in one-to-one correspondence to the plurality of pre-distorted images; comparing each of the display images with the reference image respectively, to obtain a display image having a distortion value smaller than a first threshold with respect to the reference image, and determining a correcting value of a pre-distorted image corresponding to this display image as a distortion value of the display device; and correcting the image distortion of the optical device depending on the distortion value of the optical device.
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公开(公告)号：US20190251676A1
公开(公告)日：2019-08-15
申请号：US16200944
申请日：2018-11-27
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Xiangyang Liu , Xitong Ma , Naifu Wu , Xiaojun Tang
Abstract: The present disclosure provides an image correction method and device. The method includes: correcting a target face image; obtaining first eye position information and second eye position information through calculation according to the face image; obtaining a first image correction parameter and a second image correction parameter via calculation based on the first eye position information and the second eye position information; and correcting a first image according to the first image correction parameter and correcting a second image according to the second image correction parameter.
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