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公开(公告)号：US11727540B2
公开(公告)日：2023-08-15
申请号：US17139880
申请日：2020-12-31
Applicant: Samsung Electronics Co., Ltd.
Inventor： Zhen Tong , Yibo Xu , John W. Glotzbach , Hamid R. Sheikh , Ruiwen Zhen , Baekdu Choi
CPC classification number: G06T5/003 , G06T5/002 , G06T5/009 , G06T5/20 , G06T5/50 , G06T7/13 , G06T2207/20192 , G06T2207/20208 , G06T2207/20221
Abstract: Various image sharpening techniques are disclosed. For example, a method for image sharpening includes obtaining, using at least one sensor of an electronic device, an image that includes visual content. The method also includes generating an edge map that indicates edges of the visual content within the image. The method further includes applying a high-pass signal and an adaptive gain based on the edge map to sharpen the image. The method also includes generating a bright halo mask and a dark halo mask based on the edge map, where the bright halo mask indicates an upper sharpening limit and the dark halo mask indicates a lower sharpening limit. In addition, the method includes modifying a level of sharpening at one or more of the edges within the sharpened image to provide halo artifact reduction based on the bright halo mask and the dark halo mask.
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公开(公告)号：US20220020120A1
公开(公告)日：2022-01-20
申请号：US17103809
申请日：2020-11-24
Applicant: Samsung Electronics Co., Ltd.
Inventor： Ruiwen Zhen , John W. Glotzbach , Hamid R. Sheikh
Abstract: A method includes obtaining, using at least one processor, an image of a scene including image data in each of multiple channels of a color space. The method also includes decomposing a channel of the image into a first base layer and a first detail layer. The method further includes generating a first enhanced detail layer by manipulating a characteristic of the first detail layer. The method also includes decomposing the first base layer into a second base layer and a second detail layer. The method further includes generating a second enhanced detail layer by manipulating a characteristic of the second detail layer. In addition, the method includes combining the first enhanced detail layer, the second enhanced detail layer, and the second base layer to obtain an enhanced image of the scene.
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公开(公告)号：US11128809B2
公开(公告)日：2021-09-21
申请号：US16277630
申请日：2019-02-15
Applicant: Samsung Electronics Co., Ltd.
Inventor： Ruiwen Zhen , John Glotzbach , Ibrahim Pekkucuksen , Hamid R. Sheikh
Abstract: An electronic device, method, and computer readable medium for compositing high dynamic range frames are provided. The electronic device includes a camera, and a processor coupled to the camera. The processor registers the plurality of multi-exposure frames with a hybrid of matched features to align non-reference frames with a reference frame; generates blending maps of the plurality of multi-exposure frames to reduce moving ghost artifacts and identify local areas that are well-exposed in the plurality of multi-exposure frames; and blends the plurality of multi-exposure frames weighted by the blending maps using a two-step weight-constrained exposure fusion technique into a high dynamic range (HDR) frame.
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公开(公告)号：US11095829B2
公开(公告)日：2021-08-17
申请号：US16544008
申请日：2019-08-19
Applicant: Samsung Electronics Co., Ltd.
Inventor： Ruiwen Zhen , John W. Glotzbach , Hamid R. Sheikh , Ibrahim Pekkucuksen , Zhen Tong , Long N. Le
Abstract: A method includes obtaining multiple image frames of a scene using at least one sensor of an electronic device. The multiple image frames include a first image frame and a second image frame having a longer exposure than the first image frame. The method also includes generating a label map that identifies pixels in the multiple image frames that are to be used in an image. The method further includes generating the image of the scene using the pixels extracted from the image frames based on the label map. The label map may include multiple labels, and each label may be associated with at least one corresponding pixel and may include a discrete value that identifies one of the multiple image frames from which the at least one corresponding pixel is extracted.
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公开(公告)号：US20210042941A1
公开(公告)日：2021-02-11
申请号：US16727751
申请日：2019-12-26
Applicant: Samsung Electronics Co., Ltd.
Inventor： Ruiwen Zhen , John W. Glotzbach , Hamid R. Sheikh
Abstract: A method includes receiving a reference image and a non-reference image; dividing the reference image into a plurality of tiles; determining, using an electronic device, a motion vector map using coarse-to-fine based motion vector estimation; and generating an output frame using the motion vector map with the reference image and the non-reference image.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20210042897A1
公开(公告)日：2021-02-11
申请号：US16707652
申请日：2019-12-09
Applicant: Samsung Electronics Co., Ltd.
Inventor： Zhen Tong , John W. Glotzbach , Ruiwen Zhen , Hamid R. Sheikh
Abstract: A method includes obtaining, using at least one sensor of an electronic device, multiple image frames of a scene. The multiple image frames include a first image frame and a second image frame captured using different exposures. The method also includes excluding, using at least one processor of the electronic device, pixels in the first and second image frames based on a coarse motion map. The method further includes generating, using the at least one processor, multiple local histogram match maps based on different portions of the first and second image frames. In addition, the method includes generating, using the at least one processor, an image of the scene using the local histogram match maps.
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公开(公告)号：US20200265567A1
公开(公告)日：2020-08-20
申请号：US16278512
申请日：2019-02-18
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yuting Hu , Ruiwen Zhen , John W. Glotzbach , Ibrahim Pekkucuksen , Hamid R. Sheikh
Abstract: A method includes obtaining multiple image frames of a scene using at least one camera of an electronic device. The method also includes using a convolutional neural network to generate blending maps associated with the image frames. The blending maps contain or are based on both a measure of motion in the image frames and a measure of how well exposed different portions of the image frames are. The method further includes generating a final image of the scene using at least some of the image frames and at least some of the blending maps. The final image of the scene may be generated by blending the at least some of the image frames using the at least some of the blending maps, and the final image of the scene may include image details that are lost in at least one of the image frames due to over-exposure or under-exposure.
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公开(公告)号：US11354781B2
公开(公告)日：2022-06-07
申请号：US17103809
申请日：2020-11-24
Applicant: Samsung Electronics Co., Ltd.
Inventor： Ruiwen Zhen , John W. Glotzbach , Hamid R. Sheikh
Abstract: A method includes obtaining, using at least one processor, an image of a scene including image data in each of multiple channels of a color space. The method also includes decomposing a channel of the image into a first base layer and a first detail layer. The method further includes generating a first enhanced detail layer by manipulating a characteristic of the first detail layer. The method also includes decomposing the first base layer into a second base layer and a second detail layer. The method further includes generating a second enhanced detail layer by manipulating a characteristic of the second detail layer. In addition, the method includes combining the first enhanced detail layer, the second enhanced detail layer, and the second base layer to obtain an enhanced image of the scene.
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公开(公告)号：US20220021802A1
公开(公告)日：2022-01-20
申请号：US17139920
申请日：2020-12-31
Applicant: Samsung Electronics Co., Ltd.
Inventor： Long N. Le , Ruiwen Zhen , John W. Glotzbach , Hamid R. Sheikh , Ibrahim Pekkucuksen
Abstract: A method includes obtaining, using at least one processor of an electronic device, a high dynamic range (HDR) input Bayer image. The method also includes generating, using the at least one processor of the electronic device, a plurality of synthesized images at different exposure levels based on the input Bayer image. The method further includes fusing, using the at least one processor of the electronic device, the synthesized images to generate a fused image. The method also includes generating, using the at least one processor of the electronic device, a gain map based on the fused image. In addition, the method includes applying, using the at least one processor of the electronic device, a gain based on the gain map to the input Bayer image.
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公开(公告)号：US11151731B2
公开(公告)日：2021-10-19
申请号：US16727751
申请日：2019-12-26
Applicant: Samsung Electronics Co., Ltd.
Inventor： Ruiwen Zhen , John W. Glotzbach , Hamid R. Sheikh
Abstract: A method includes receiving a reference image and a non-reference image; dividing the reference image into a plurality of tiles; determining, using an electronic device, a motion vector map using coarse-to-fine based motion vector estimation; and generating an output frame using the motion vector map with the reference image and the non-reference image.
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