Invention Grant
- Patent Title: High dynamic range image capture using single photon avalanche diodes
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Application No.: US17181922Application Date: 2021-02-22
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Publication No.: US11431918B1Publication Date: 2022-08-30
- Inventor: Raymond Kirk Price , Christopher Douglas Edmonds , Michael Bleyer
- Applicant: Microsoft Technology Licensing, LLC
- Applicant Address: US WA Redmond
- Assignee: Microsoft Technology Licensing, LLC
- Current Assignee: Microsoft Technology Licensing, LLC
- Current Assignee Address: US WA Redmond
- Agency: Workman Nydegger
- Main IPC: H04N5/235
- IPC: H04N5/235 ; G06T5/50 ; G06T5/00

Abstract:
A system for HDR image capture is configurable to perform a split long exposure operation by applying a first set of long exposure shutter operations to configure each SPAD pixel of the SPAD array to enable photon detection and applying a second set of long exposure shutter operations to configure each SPAD pixel of the SPAD array to enable photon detection. A time period intervenes between the first and second sets of long exposure shutter. The system is configurable to perform a short exposure operation by applying a set of short exposure shutter operations to configure each SPAD pixel of the SPAD array to enable photon detection. The short exposure operation occurs during the time period that intervenes between the first and second sets of long exposure shutter operations. The system is also configurable to generate an image based on the split long exposure operation and the short exposure operation.
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