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公开(公告)号：US10009551B1
公开(公告)日：2018-06-26
申请号：US15473324
申请日：2017-03-29
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Mark Stevens Adcock , Ilya Vladimirovich Brailovskiy , Ilia Vitsnudel , Ian David Skidmore , Philip James Taylor
CPC classification number: H04N5/247 , H04N5/23238 , H04N5/2351 , H04N5/265
Abstract: An image processor merges images from a plurality of cameras including applying spatially-varying gains over images from individual cameras to obtain a consistent effective where the images are stitched together despite the cameras possibly having different camera exposures. The image processor can adjust the camera exposures to improve stitching results. In addition to gain modification, the image processor can also modify the images for other artifacts, such as veiling glare and make those less visible at the seams of images. The image processor also can take into account constraints on gain changes and optimize camera parameters to minimize stitching artifacts. Using a cost function, the image processor can optimize for constraints on camera exposure that would otherwise result in camera exposure differences that would themselves cause visible artifacts.
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公开(公告)号：US10769442B1
公开(公告)日：2020-09-08
申请号：US15700536
申请日：2017-09-11
Applicant: Amazon Technologies, Inc.
Inventor： Siyi Ding , Xiaoran Wang , Manika Puri , Mashhour Solh , Philip James Taylor
Abstract: Techniques are generally described for scene change detection. A first and second histogram representing frames of a video may be received. A Euclidean distance between the first and second histogram may be determined. A third histogram of a third frame may be received. Values of the third histogram may be compared to corresponding values of a background model of the environment. A fourth frame and a fifth frame of image data of the video may be received. A flow value between a first block of pixels of the fourth frame and a corresponding second block of pixels of the fifth frame may be determined. The flow value may be determined based on a motion vector and a sum of absolute differences between the first and second block. A portion of the video may be streamed to a remote computing device if the flow value exceeds a threshold value.
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公开(公告)号：US10063792B1
公开(公告)日：2018-08-28
申请号：US14870935
申请日：2015-09-30
Applicant: Amazon Technologies, Inc.
Inventor： Ilya Vladimirovich Brailovskiy , Ilia Vitsnudel , Philip James Taylor , Nathaniel Bubis , Matthew Alan Townsend , Dmitry Svetlov , Noam Sorek , Benjamin Robert Hirsch , Paul Andersen Alioshin
CPC classification number: H04N5/2628 , H04N5/2258 , H04N5/23238 , H04N7/181
Abstract: Various examples are directed to systems and methods for formatting stitched panoramic frames for transmission to a remote image processing system, the method comprising. A control circuit of a panoramic camera may receive first and second frames captured by first and second image sensors having partially overlapping fields-of-view. The control circuit may identify a first overlap region of the first frame and a second overlap region of the second frame. The first and second overlap region may comprise pixel values from portions of the fields-of-view of the image sensors that overlap. The control circuit may generate a panoramic frame from based at least in part on the first and second frames. The control circuit may generate a transmission frame comprising the panoramic frame, the first overlap region and the second overlap region.
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