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公开(公告)号：US20210150765A1
公开(公告)日：2021-05-20
申请号：US17157833
申请日：2021-01-25
Applicant: Apple Inc.
Inventor： Khaled Mammou , Fabrice A. Robinet , Alexandros Tourapis , Yeping Su
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud.
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公开(公告)号：US20210097725A1
公开(公告)日：2021-04-01
申请号：US17119893
申请日：2020-12-11
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , David W. Singer , Alexandros Tourapis , Fabrice A. Robinet , Hsi-Jung Wu
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. A closed-loop color conversion process is used to improve compression while taking into consideration distortion introduced throughout the point cloud compression process.
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公开(公告)号：US20210082152A1
公开(公告)日：2021-03-18
申请号：US17104383
申请日：2020-11-25
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Valery G. Valentin , Fabrice A. Robinet , Khaled Mammou , Jungsun Kim , Yeping Su
IPC: G06T9/00
Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. In order to improve computing efficiency and/or repeatability, fixed-point number representations are used when determining predicted attribute values and attribute correction values. A decoder follows a similar prediction process as an encoder and corrects predicted values using attribute correction values included in a compressed attribute information file using fixed-point number representations.
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公开(公告)号：US10909727B2
公开(公告)日：2021-02-02
申请号：US16380930
申请日：2019-04-10
Applicant: Apple Inc.
Inventor： Khaled Mammou , Alexandros Tourapis , Jungsun Kim , Fabrice A. Robinet , Valery G. Valentin , Yeping Su
Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute for the point cloud. To compress the attribute information, multiple levels of detail are generated based on spatial information. Also, attribute values are predicted based on the level of details. A decoder follows a similar prediction process based on level of details. Also, attribute correction values may be determined to correct predicted attribute values and may be used by a decoder to decompress a point cloud compressed using level of detail attribute compression. In some embodiments, an update operation is performed to smooth attribute correction values taking into account an influence factor of respective points in a given level of detail on attributes in other levels of detail.
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公开(公告)号：US10812832B2
公开(公告)日：2020-10-20
申请号：US14732393
申请日：2015-06-05
Applicant: Apple Inc.
Inventor： Hang Yuan , Chris Y. Chung , Jae Hoon Kim , Yeping Su , Jiefu Zhai , Xiaosong Zhou , Hsi-Jung Wu
IPC: H04N19/85 , H04N19/33 , H04N19/88 , H04N19/503
Abstract: Coding techniques for image data may cause a still image to be converted to a “phantom” video sequence, which is coded by motion compensated prediction techniques. Thus, coded video data obtained from the coding operation may include temporal prediction references between frames of the video sequence. Metadata may be generated that identifies allocations of content from the still image to the frames of the video sequence. The coded data and the metadata may be transmitted to another device, whereupon it may be decoded by motion compensated prediction techniques and converted back to a still image data. Other techniques may involve coding an image in both a base layer representation and at least one coded enhancement layer representation. The enhancement layer representation may be coded predictively with reference to the base layer representation. The coded base layer representation may be partitioned into a plurality of individually-transmittable segments and stored. Prediction references of elements of the enhancement layer representation may be confined to segments of the base layer representation that correspond to a location of those elements. Meaning, when a pixel block of an enhancement layer maps to a given segment of the base layer representation, prediction references are confined to that segment and do not reference portions of the base layer representation that may be found in other segment(s).
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Patent Agency Ranking
76.发明授权公开(公告)号：US10757445B2
公开(公告)日：2020-08-25
申请号：US16173105
申请日：2018-10-29
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , David W. Singer , Haitao Guo , Hsi-Jung Wu , Sorin C. Cismas , Xiaohua Yang , Yeping Su , Dazhong Zhang
IPC: H04N19/593 , H04N19/156 , H04N19/44 , H04N19/176 , H04N19/182 , H04N19/174
Abstract: Methods are described for encoding and decoding blocks of image data using intra block copying (IBC). A source block for intra block copying is selected from a source region of a current image that is closer to the current block than a threshold, wherein the source region does not include a portion of the current image that is further from the current block than the threshold.
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公开(公告)号：US10715816B2
公开(公告)日：2020-07-14
申请号：US15349989
申请日：2016-11-11
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , David W. Singer , Hsi-Jung Wu , Yeping Su
IPC: H04N19/154 , H04N19/61 , H04N19/124 , H04N19/13 , H04N19/15 , H04N19/105 , H04N19/51 , H04N9/64 , H04N1/64 , H04N9/67 , H04N19/17 , H04N19/186
Abstract: Techniques for selecting a luminance value for color space conversion are disclosed. Techniques include determining values for Cb and Cr from values for R′, G′, and B′; producing a reconstructed Cb* value and a reconstructed Cr* value by processing the Cb and Cr values; and determining a plurality of Y′ value options from the values for Cb* and Cr*. A Y′ output value may be selected based on the plurality of Y′ value options.
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公开(公告)号：US10602025B2
公开(公告)日：2020-03-24
申请号：US16034272
申请日：2018-07-12
Applicant: Apple Inc.
Inventor： Alexandros Michael Tourapis , Yeping Su , David William Singer , Hsi-Jung Wu
IPC: H04N1/60 , H04N9/67 , H04N19/46 , H04N19/186 , H04N19/85
Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.
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公开(公告)号：US20200021856A1
公开(公告)日：2020-01-16
申请号：US16508202
申请日：2019-07-10
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet , Yeping Su , Khaled Mammou
IPC: H04N19/91 , H04N19/20 , G06T9/00 , H04N19/13 , H04N19/124
Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information for the point cloud. To compress the attribute information, multiple levels of detail are generated based on an ordering of the points according to a space filling curve and attribute values are predicted. The attribute values may be predicted simultaneously while points are being assigned to different levels of detail. A decoder follows a similar prediction process based on level of details. Also, attribute correction values may be determined to correct predicted attribute values and may be used by a decoder to decompress a point cloud compressed using level of detail attribute compression. In some embodiments, attribute correction values may take into account an influence factor of respective points in a given level of detail on attributes in other levels of detail.
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公开(公告)号：US20190311499A1
公开(公告)日：2019-10-10
申请号：US16380920
申请日：2019-04-10
Applicant: Apple Inc.
Inventor： Khaled Mammou , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet , Yeping Su , Alexandros Tourapis
Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute for the point cloud. To compress the attribute information, attribute values are predicted using one of a plurality of prediction strategies, wherein a selected prediction strategy is selected based at least in part on attribute variability of points in a neighborhood of points. A decoder follows a similar prediction process. Also, attribute correction values may be determined to correct predicted attribute values and may be used by a decoder to decompress a point cloud, wherein the decoder applies the same prediction strategy applied at the encoder.
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