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公开(公告)号：US20210256291A1
公开(公告)日：2021-08-19
申请号：US16960052
申请日：2019-05-09
发明人： Huanhuan Zhang , Jingtao Xu , Xiaojun Tang , Hui Li
摘要： A computer-implemented method of detecting a foreign object on a background object in an image is provided. The computer-implemented method includes extracting image features of the image based on image characteristics of the background object and a suspected foreign object; detecting a salient region in the image based on a human visual attention model; generating a salient region mask based on detection of the salient region; obtaining the image features in a region surrounded by the salient region mask; perforating feature combination and feature vector length normalization on the image features of the region surrounded by the salient region mask to generate normalized feature vectors; and identifying the suspected foreign object using an image classifier, wherein the image classifier uses the normalized feature vectors as input for identifying the suspected foreign object.
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公开(公告)号：US11361587B2
公开(公告)日：2022-06-14
申请号：US16840597
申请日：2020-04-06
发明人： Huanhuan Zhang
摘要： The present disclosure provides an age recognition method, a non-transitory computer-readable storage medium, and an electronic device. The method includes extracting feature points of a face in an image, preprocessing the image to extract global features of the face, extracting local features of the face based on the feature points, determining an age feature of the face according to the global features and the local features, and inputting the age feature into a pre-trained age recognition model to obtain an age value corresponding to the face in the image.
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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
发明人： Huanhuan Zhang , Tong Liu , Xiaojun Tang , Yifei Zhang , Zhiguo Zhang
摘要： 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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公开(公告)号：US11468594B2
公开(公告)日：2022-10-11
申请号：US16904800
申请日：2020-06-18
发明人： Huanhuan Zhang , Tong Liu , Yifei Zhang , Xiaojun Tang
摘要： The present disclosure provides an image processing method, device and apparatus, and a computer-readable storage medium. The image processing method includes: obtaining an image and detecting multiple targets in the image; obtaining categories of multiple detected targets and first parameters of a detection frame corresponding to each detected target, and ranking all detected targets according to the first parameters in a descending order to obtain a dataset; obtaining a target with a highest first parameter in the dataset as a first detected target, and detecting whether the first parameter of a first detection frame corresponding to the first detected target satisfies a preset category condition of a category to which the first detected target belongs; detecting whether the first detection frame corresponding to the first detected target overlaps with a detection frame corresponding to a respective one of the plurality of detected targets except the first detected target.
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公开(公告)号：US11244144B2
公开(公告)日：2022-02-08
申请号：US16815613
申请日：2020-03-11
发明人： Huanhuan Zhang
摘要： The present invention provides an age recognition method, a computer program and an electronic device. The method comprises: acquiring a face image to be recognized; extracting face characteristic points in the face image to be recognized, and characteristic point coordinates of the face characteristic points in the face image to be recognized; extracting face global features from the face image to be recognized according to the characteristic point coordinates; extracting face local features from the face image to be recognized according to the face characteristic points; and determining an age recognition result corresponding to the face image to be recognized according to the face global features, the face local features and an age recognition model obtained by pre-training.
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公开(公告)号：US11823474B2
公开(公告)日：2023-11-21
申请号：US17428811
申请日：2020-10-27
发明人： Huanhuan Zhang , Guangwei Huang
IPC分类号： G06V30/226 , G06V30/30 , G06V30/18
CPC分类号： G06V30/2268 , G06V30/1801 , G06V30/30
摘要： The present disclosure relates to a handwritten text recognition method, including: acquiring an information sequence including a plurality of track points of handwritten text, wherein information on each track point comprises its abscissa, writing time and writing state value; dividing the plurality of track points into a plurality of strokes according to the writing state value of each track point, the writing state value including a first value representative of stroke pen-up and a second value representative of stroke pen-down, respectively; calculating a first segmentation threshold of the handwritten text; determining a first text segmentation point according to a result of comparison between an absolute value of a difference between abscissas of a start track point of one stroke and an end track point of its previous stroke and the first segmentation threshold; and performing text segmentation according to the first text segmentation point to obtain a text segmentation result.
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7.发明公开公开(公告)号：US20230245483A1
公开(公告)日：2023-08-03
申请号：US17921241
申请日：2020-05-27
发明人： Huanhuan Zhang
IPC分类号： G06V30/262 , G06V30/19 , G06V10/82 , G06V30/182
CPC分类号： G06V30/274 , G06V30/1916 , G06V10/82 , G06V30/1831
摘要： A handwriting recognition method and apparatus, and an electronic device and a storage medium are provided. The method includes: acquiring a text image containing handwritten text; inputting the text image into a convolutional neural network, and extracting a CNN feature and a HOG feature of the text image; and extracting the handwritten text in text image according to the CNN feature and the HOG feature.
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公开(公告)号：US20220319214A1
公开(公告)日：2022-10-06
申请号：US17428811
申请日：2020-10-27
发明人： Huanhuan Zhang , Guangwei Huang
IPC分类号： G06V30/226 , G06V30/18 , G06V30/30
摘要： The present disclosure relates to a handwritten text recognition method, including: acquiring an information sequence including a plurality of track points of handwritten text, wherein information on each track point comprises its abscissa, writing time and writing state value; dividing the plurality of track points into a plurality of strokes according to the writing state value of each track point, the writing state value including a first value representative of stroke pen-up and a second value representative of stroke pen-down, respectively; calculating a first segmentation threshold of the handwritten text; determining a first text segmentation point according to a result of comparison between an absolute value of a difference between abscissas of a start track point of one stroke and an end track point of its previous stroke and the first segmentation threshold; and performing text segmentation according to the first text segmentation point to obtain a text segmentation result.
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公开(公告)号：US11238301B2
公开(公告)日：2022-02-01
申请号：US16960052
申请日：2019-05-09
发明人： Huanhuan Zhang , Jingtao Xu , Xiaojun Tang , Hui Li
摘要： A computer-implemented method of detecting a foreign object on a background object in an image is provided. The computer-implemented method includes extracting image features of the image based on image characteristics of the background object and a suspected foreign object; detecting a salient region in the image based on a human visual attention model; generating a salient region mask based on detection of the salient region; obtaining the image features in a region surrounded by the salient region mask; perforating feature combination and feature vector length normalization on the image features of the region surrounded by the salient region mask to generate normalized feature vectors; and identifying the suspected foreign object using an image classifier, wherein the image classifier uses the normalized feature vectors as input for identifying the suspected foreign object.
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公开(公告)号：US20210089753A1
公开(公告)日：2021-03-25
申请号：US16815613
申请日：2020-03-11
发明人： Huanhuan Zhang
摘要： The present invention provides an age recognition method, a computer program and an electronic device. The method comprises: acquiring a face image to be recognized; extracting face characteristic points in the face image to be recognized, and characteristic point coordinates of the face characteristic points in the face image to be recognized; extracting face global features from the face image to be recognized according to the characteristic point coordinates; extracting face local features from the face image to be recognized according to the face characteristic points; and determining an age recognition result corresponding to the face image to be recognized according to the face global features, the face local features and an age recognition model obtained by pre-training.
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