Acoustic neural network scene detection

    公开(公告)号:US11545170B2

    公开(公告)日:2023-01-03

    申请号:US17247137

    申请日:2020-12-01

    Applicant: Snap Inc.

    Abstract: An acoustic environment identification system is disclosed that can use neural networks to accurately identify environments. The acoustic environment identification system can use one or more convolutional neural networks to generate audio feature data. A recursive neural network can process the audio feature data to generate characterization data. The characterization data can be modified using a weighting system that weights signature data items. Classification neural networks can be used to generate a classification of an environment.

    Data retrieval using reinforced co-learning for semi-supervised ranking

    公开(公告)号:US11544553B1

    公开(公告)日:2023-01-03

    申请号:US16448749

    申请日:2019-06-21

    Applicant: Snap Inc.

    Abstract: A computer-implement method comprises: training a classifier with labeled data from a dataset; classifying, by the trained classifier, unlabeled data from the dataset; providing, by the classifier to a policy gradient, a reward signal for each data/query pair; transferring, by the classifier to a ranker, learning; training, by the policy gradient, the ranker; ranking data from the dataset based on a query; and retrieving data from the ranked data in response to the query.

    Sequence-of-sequences model for 3D object recognition

    公开(公告)号:US11410439B2

    公开(公告)日:2022-08-09

    申请号:US16870138

    申请日:2020-05-08

    Applicant: Snap Inc.

    Abstract: Systems and methods are disclosed for capturing multiple sequences of views of a three-dimensional object using a plurality of virtual cameras. The systems and methods generate aligned sequences from the multiple sequences based on an arrangement of the plurality of virtual cameras in relation to the three-dimensional object. Using a convolutional network, the systems and methods classify the three-dimensional object based on the aligned sequences and identify the three-dimensional object using the classification.

    Local augmented reality persistent sticker objects

    公开(公告)号:US11308706B2

    公开(公告)日:2022-04-19

    申请号:US16927273

    申请日:2020-07-13

    Applicant: Snap Inc.

    Abstract: Systems and methods for local augmented reality (AR) tracking of an AR object are disclosed. In one example embodiment a device captures a series of video image frames. A user input is received at the device associating a first portion of a first image of the video image frames with an AR sticker object and a target. A first target template is generated to track the target across frames of the video image frames. In some embodiments, global tracking based on a determination that the target is outside a boundary area is used. The global tracking comprises using a global tracking template for tracking movement in the video image frames captured following the determination that the target is outside the boundary area. When the global tracking determines that the target is within the boundary area, local tracking is resumed along with presentation of the AR sticker object on an output display of the device.

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