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公开(公告)号：US12260525B2
公开(公告)日：2025-03-25
申请号：US17793487
申请日：2021-06-16
Inventor： Xiaolei Liu , Jiankang Sun , Lili Chen , Hao Zhang
IPC: G06T5/70 , G06T3/4007 , G06T3/403 , G06T7/13
Abstract: An image processing method includes: according to position coordinates of any interpolation pixel in a target image, determining position coordinate of the interpolation pixel in an original image; calculating a two-dimensional image entropy of an (n×n) neighborhood of the interpolation pixel in the original image; when it is greater than or equal to a preset entropy threshold value, calculating a pixel value of the interpolation pixel based on all original pixels; when it is less than the preset entropy threshold, calculating gradient values in at least two edge directions within the threshold neighborhood and determining whether there is a strong-edge direction; if so, calculating the pixel value of the interpolation pixel based on a plurality of original pixels in the strong-edge direction; if not, calculating the pixel value of the interpolation pixel based on all the original pixels.
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公开(公告)号：US12254588B2
公开(公告)日：2025-03-18
申请号：US17642455
申请日：2021-03-09
Inventor： Xiaolei Liu , Jiankang Sun , Lili Chen , Hao Zhang
IPC: G06T3/4007 , G06T5/50
Abstract: Provided a method for processing an image, including: acquiring an interpolation image by performing interpolation processing on a to-be-processed image, wherein the interpolation image includes a plurality of interpolation pixels; acquiring, for each of the interpolation pixels, a first candidate pixel value and a second candidate pixel value by adjusting the initial pixel value of the interpolation pixel; determining a first difference between a second derivative of the first candidate pixel value and a second derivative of a pixel value of a target original pixel; determining a second difference between a second derivative of the second candidate pixel value and the second derivative of the pixel value of the target original pixel; and updating the initial pixel value of the interpolation pixel; wherein the target original pixel includes each original pixel adjacent to the interpolation pixel.
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公开(公告)号：US12223590B2
公开(公告)日：2025-02-11
申请号：US17907090
申请日：2021-08-16
Inventor： Yaoyu Lv , Zhanshan Ma , Jiankang Sun , Yachong Xue , Lili Chen , Hao Zhang
Abstract: A display processing method and device are provided. The method is applied to a rotatable three-dimensional display device including a rotatable display panel, the method includes: obtaining model information about an image model in a to-be-displayed image, the image model including one or more attribute sets including triangular faces constituting the image model; traversing coordinate information about vertices of each triangular face in each attribute set according to association relationship among the attribute sets; generating display data for the display panel at each phase according to the coordinate information about the vertices of each triangular face; and displaying an image according to the display data at each phase when the display panel is at the each phase.
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公开(公告)号：US11301039B2
公开(公告)日：2022-04-12
申请号：US16836054
申请日：2020-03-31
Inventor： Jiankang Sun , Hao Zhang , Lili Chen , Liyang Cui , Yachong Xue , Gang Li
IPC: G06F3/01
Abstract: The application discloses a method and a device for calculating parameters of a gaze-point calculation model. The method includes: displaying multiple calibration points in sequence on a device screen, and collecting multiple pupil-coordinates data corresponding to each of at least one calibration point of the multiple calibration points; for each calibration point of the at least one calibration point, screening the multiple pupil-coordinates data corresponding to the calibration point, to obtain at least one pupil-coordinates calibration data corresponding to the calibration point; calculating multiple parameters of the gaze-point calculation model according to coordinates data of each calibration point and the at least one pupil-coordinates calibration data corresponding to the calibration point.
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5.发明授权公开(公告)号：US11120562B2
公开(公告)日：2021-09-14
申请号：US16537241
申请日：2019-08-09
Inventor： Zehua Dong , Minglei Chu , Lili Chen , Hao Zhang , Jiankang Sun , Yukun Sun , Jinghua Miao , Zhifu Li , Xuefeng Wang , Hongzhen Xue
IPC: A61B5/11 , G01C21/16 , G06F1/16 , G06F3/01 , G06K9/00 , G06T19/00 , G06T7/207 , G06T7/277 , G06T7/60 , G06T7/73
Abstract: The present disclosure provides a posture estimation method, a posture estimation apparatus, and a computer readable storage medium. Here, the posture estimation method includes: calculating an angular velocity control amount at a current moment based on a measured acceleration value and an estimated acceleration value at the current moment; correcting the measured angular velocity value at the current moment according to the calculated angular velocity control amount to obtain the corrected angular velocity value at the current moment; and obtaining an estimated posture quaternion value at a next moment according to the corrected angular velocity value obtained by calculation and an estimated posture quaternion value at the current moment.
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Patent Agency Ranking
公开(公告)号：US20210247320A1
公开(公告)日：2021-08-12
申请号：US16956886
申请日：2020-01-02
Inventor： Hongzhen Xue , Fuqiang Ma , Yali Liu , Lili Chen , Jiankang Sun , Shuo Zhang
Abstract: An optical distortion measurement method that including receiving target field of view information; processing the target field of view information using a coordinate conversion model to obtain screen coordinates of a target angle of view, wherein the coordinate conversion model may be configured to convert image plane coordinates of the target angle of view to screen coordinates of the target angle of view; and outputting at least the screen coordinates of the target angle of view.
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公开(公告)号：US20210223859A1
公开(公告)日：2021-07-22
申请号：US16305882
申请日：2018-01-30
Inventor： Jiankang Sun , Hao Zhang , Lili Chen , Minglei Chu , Jian Sun , Ziqiang Guo , Guixin Yan , Yakun Wang
Abstract: Embodiments of the present disclosure provide a method and a device for determining a gaze placement and a computer readable storage medium. The method comprises acquiring an ocular image of a subject; determining at least one gaze characteristic vector based on an ocular image; determining a gaze placement of the subject, according to a gaze estimation model and the at least one characteristic vector. The characteristic vector comprises at least one of: a first characteristic vector from a first reference speckle center to a pupil center, wherein the first reference speckle is formed by a first reference source in the ocular image; a second characteristic vector from the pupil center to a second reference speckle center, wherein the second reference speckle is formed by a second reference source in the ocular image; a third characteristic vector from the second reference speckle center to the first reference speckle center.
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公开(公告)号：US11783445B2
公开(公告)日：2023-10-10
申请号：US16641537
申请日：2019-03-13
Inventor： Xuefeng Wang , Yukun Sun , Hao Zhang , Lili Chen , Jinghua Miao , Bin Zhao , Xi Li , Lixin Wang , Jianwen Suo , Wenyu Li , Jinbao Peng , Qingwen Fan , Yuanjie Lu , Yali Liu , Chenru Wang , Jiankang Sun
IPC: G06T3/40 , G06F3/04845 , G06T11/60
CPC classification number: G06T3/4038 , G06F3/04845 , G06T11/60
Abstract: An image processing method is provided, the method includes: performing area division on an input image to obtain a plurality of sub-images; determining a part of the plurality of sub-images as an image to be output; stitching respective sub-images of the image to be output to obtain a stitched image; and transmitting the stitched image, wherein the stitched image is smaller than the input image. An image jointing method is provided, the method includes: receiving a stitched image obtained by the image processing method according to the present disclosure; extracting respective sub-images of an image to be output from the stitched image; and jointing the respective sub-images to obtain a display image, wherein the jointing the respective sub-images refers to obtaining the display image by an operation inverse to a stitching process of stitching the respective sub-images to obtain the stitched image.
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9.发明授权公开(公告)号：US11734841B2
公开(公告)日：2023-08-22
申请号：US17349952
申请日：2021-06-17
Inventor： Yachong Xue , Hao Zhang , Lili Chen , Jiankang Sun , Guixin Yan , Xiaolei Liu , Yaoyu Lv , Menglei Zhang , Xinkai Li
CPC classification number: G06T7/292 , G06F3/013 , G06T3/40 , G06T7/73 , G06V40/161 , G06V40/19 , H04N23/90 , G06T2207/20212 , G06T2207/30201
Abstract: A method for tracking eye gaze, a system, a processing device and a computer readable storage medium are provided. The method includes: acquiring original images acquired by multiple image acquisition devices, splicing the multiple original images into a spliced image, and determining a responsible region of each image acquisition device in the spliced image; performing preliminary face locating on the spliced image, and determining one or more original images corresponding to a preliminarily located face position according to the preliminarily located face position and the responsible region; and performing secondary face locating on the one or more determined original images to obtain face pose information and a positional relation of pupils with respect to human eyes, and calculating coordinates of gaze points of the human eyes according to the obtained face pose information and the positional relation of the pupils with respect to the human eyes.
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公开(公告)号：US11699303B2
公开(公告)日：2023-07-11
申请号：US17319933
申请日：2021-05-13
Inventor： Yachong Xue , Hao Zhang , Lili Chen , Jiankang Sun , Xinkai Li , Guixin Yan , Xiaolei Liu , Yaoyu Lv , Menglei Zhang
CPC classification number: G06V40/193 , G06T7/80 , G06V40/171 , G06V40/19
Abstract: A system and a method of calculating coordinates of a pupil center point are provided. The system for acquiring the coordinates of the pupil center point includes a first camera, a second camera, a storage and a processor. The first camera is configured to capture a first image including a face and output the first image to the processor, the second camera is configured to capture a second image including a pupil and output the second image to the processor, a resolution of the first camera is smaller than a resolution of the second camera, and the storage is configured to store processing data, and the processor is configured to: acquire the first image and the second image; extract a first eye region corresponding to an eye from the first image; convert the first eye region into the second image, to acquire a second eye region corresponding to the eye in the second image; and detect a pupil in the second eye region and acquire the coordinates of the pupil center point.
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