Invention Grant
- Patent Title: Systems and methods for dark current compensation in single photon avalanche diode imagery
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Application No.: US17334618Application Date: 2021-05-28
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Publication No.: US11696049B2Publication Date: 2023-07-04
- Inventor: Raymond Kirk Price , Michael Bleyer , Christopher Douglas Edmonds
- 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: H04N25/63
- IPC: H04N25/63 ; G06T3/40 ; H04N25/46

Abstract:
A system for dark current compensation in SPAD imagery is configurable to capture an image frame with the SPAD array and generate a temporally filtered image by performing a temporal filtering operation using the image frame and at least one preceding image frame. The at least one preceding image frame is captured by the SPAD array at a timepoint that temporally precedes a timepoint associated with the image frame. The system is also configurable to obtain a dark current image frame. The dark current image frame includes data indicating one or more SPAD pixels of the plurality of SPAD pixels that detect an avalanche event without detecting a corresponding photon. The system is also configurable to generate a dark current compensated image by performing a subtraction operation on the temporally filtered image or the image frame based on the dark current image frame.
Public/Granted literature
- US20220385842A1 SYSTEMS AND METHODS FOR DARK CURRENT COMPENSATION IN SINGLE PHOTON AVALANCHE DIODE IMAGERY Public/Granted day:2022-12-01
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