Invention Grant
- Patent Title: Methods and systems for generating and using a road friction estimate based on camera image signal processing
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Application No.: US15969973Application Date: 2018-05-03
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Publication No.: US10706294B2Publication Date: 2020-07-07
- Inventor: Sohini Roy Chowdhury , Minming Zhao , Mats Jonasson , Niklas Ohlsson
- Applicant: Volvo Car Corporation
- Applicant Address: SE Göteborg
- Assignee: Volvo Car Corporation
- Current Assignee: Volvo Car Corporation
- Current Assignee Address: SE Göteborg
- Agency: Clements Bernard Walker
- Agent Christopher L. Bernard
- Main IPC: G06T7/11
- IPC: G06T7/11 ; G06K9/00 ; B60R1/00 ; G06K9/46 ; G06K9/62

Abstract:
Methods and systems for generating and utilizing a road friction estimate (RFE) indicating the expected friction level between a road surface and the tires of a vehicle based on forward looking camera image signal processing. A forward-looking camera image is pre-processed, patch segmented (both laterally and longitudinally, as defined by wheel tracks or the like), transformed into a bird's eye view (BEV) image using perspective transformation, patch quantized, and finally classified. The resulting RFE may be used to provide driver information, automatically control the associated vehicle's motion, and/or inform a cloud-based alert service to enhance driver safety.
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