Invention Grant
- Patent Title: No-reference banding artefact predictor
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Application No.: US17255016Application Date: 2020-04-06
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Publication No.: US11297353B2Publication Date: 2022-04-05
- Inventor: Jessie Lin , Zhengzhong Tu
- Applicant: Google LLC
- Applicant Address: US CA Mountain View
- Assignee: Google LLC
- Current Assignee: Google LLC
- Current Assignee Address: US CA Mountain View
- Agent Andrew R. Basile, Jr.
- International Application: PCT/US2020/026824 WO 20200406
- International Announcement: WO2021/206674 WO 20211014
- Main IPC: H04N11/02
- IPC: H04N11/02 ; H04N19/86 ; H04N19/117 ; H04N19/176 ; H04N19/40

Abstract:
A method of measuring a banding artefact in an image includes generating a gradient profile from the image, where the gradient profile includes respective gradient magnitudes of pixels of the image; generating, using the gradient profile, a candidate banding pixel (CBP) map, where each location of the CBP map is such that a gradient magnitude of the gradient profile of a corresponding pixel of the image being greater than a first threshold and smaller than a second threshold; generating, using the CBP map, a banding edge map (BEM), where the BEM includes connected banding edges of the image; generating, using the BEM, a banding visibility map (BVM), where the BVM includes a respective banding metric for at least some pixels of the image; and generating a banding index of the image using the BVM.
Public/Granted literature
- US20210321142A1 No-Reference Banding Artefact Predictor Public/Granted day:2021-10-14
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