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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
发明人： Jiankang Sun , Hao Zhang , Lili Chen , Liyang Cui , Yachong Xue , Gang Li
IPC分类号： G06F3/01
摘要： 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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2.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
发明人： Zehua Dong , Minglei Chu , Lili Chen , Hao Zhang , Jiankang Sun , Yukun Sun , Jinghua Miao , Zhifu Li , Xuefeng Wang , Hongzhen Xue
IPC分类号： A61B5/11 , G01C21/16 , G06F1/16 , G06F3/01 , G06K9/00 , G06T19/00 , G06T7/207 , G06T7/277 , G06T7/60 , G06T7/73
摘要： 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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公开(公告)号：US20210247320A1
公开(公告)日：2021-08-12
申请号：US16956886
申请日：2020-01-02
发明人： Hongzhen Xue , Fuqiang Ma , Yali Liu , Lili Chen , Jiankang Sun , Shuo Zhang
摘要： 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
发明人： Jiankang Sun , Hao Zhang , Lili Chen , Minglei Chu , Jian Sun , Ziqiang Guo , Guixin Yan , Yakun Wang
摘要： 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
发明人： 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分类号： G06T3/40 , G06F3/04845 , G06T11/60
CPC分类号： G06T3/4038 , G06F3/04845 , G06T11/60
摘要： 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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6.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
发明人： Yachong Xue , Hao Zhang , Lili Chen , Jiankang Sun , Guixin Yan , Xiaolei Liu , Yaoyu Lv , Menglei Zhang , Xinkai Li
CPC分类号： G06T7/292 , G06F3/013 , G06T3/40 , G06T7/73 , G06V40/161 , G06V40/19 , H04N23/90 , G06T2207/20212 , G06T2207/30201
摘要： 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
发明人： Yachong Xue , Hao Zhang , Lili Chen , Jiankang Sun , Xinkai Li , Guixin Yan , Xiaolei Liu , Yaoyu Lv , Menglei Zhang
CPC分类号： G06V40/193 , G06T7/80 , G06V40/171 , G06V40/19
摘要： 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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公开(公告)号：US11367195B2
公开(公告)日：2022-06-21
申请号：US16910754
申请日：2020-06-24
发明人： Yaoyu Lv , Lili Chen , Hao Zhang , Fuqiang Ma , Jiankang Sun , Shuo Zhang , Gang Li , Yachong Xue , Xiangjun Peng , Chenxi Zhao
摘要： An image segmentation method, an image segmentation apparatus, an image segmentation device are provided, the image segmentation method including: extracting, from a current frame of a video image, a skeleton two-dimensional estimation and a skeleton three-dimensional estimation of a human three-dimensional skeleton; obtaining a target three-dimensional skeleton based on the skeleton two-dimensional estimation and the skeleton three-dimensional estimation; implementing image segmentation based on the target three-dimensional skeleton; wherein the human three-dimensional skeleton has multiple nodes, and the video image is a two-dimensional image, when calculating the target three-dimensional skeleton in the current frame, by comprehensively considering the skeleton two-dimensional estimation and skeleton three-dimensional skeleton estimation of the human three-dimensional skeleton in the current frame, the accuracy and robustness of the obtained target three-dimensional skeleton can be improved, thereby improving the accuracy of image segmentation.
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公开(公告)号：US20210241487A1
公开(公告)日：2021-08-05
申请号：US16956747
申请日：2019-11-19
发明人： Jiankang Sun , Hao Zhang , Lili Chen , Hongzhen Xue , Fuqiang Ma , Minglei Chu , Xi Li
摘要： The present disclosure relates to a pupil positioning method. The pupil positioning method may include: obtaining an eye image under illumination of a light source; determining a first internal point in a pupil of the eye image; calculating gradient changes of pixel points along a straight line starting from the first internal point toward outside of the pupil; determining a plurality of edge points at an edge of the pupil based on the gradient changes of the pixel points along the straight line; and performing ellipse fitting on the edge points to obtain a pupil center.
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公开(公告)号：US20200311888A1
公开(公告)日：2020-10-01
申请号：US16718731
申请日：2019-12-18
发明人： Gang Li , Lili Chen , Jiankang Sun , Fuqiang Ma , Liyang Cui , Minglei Chu , Yachong Xue
摘要： Embodiments of the present disclosure provides an image processing method, comprising: acquiring an initial image comprising an image of pupil; acquiring an accumulative histogram set of grayscale values of pixels in the initial image; determining a threshold for binarizing the initial image according to a grayscale value corresponding to a target region in respective accumulative histograms in the accumulative histogram set, wherein the target region corresponds to the image of pupil in the initial image; and binarizing the initial image according to the threshold. An image processing apparatus and a wearable device are further provided.
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