US 12,405,116 B2
Navigation system with automatic optical calibration mechanism and method of operation thereof
Mengchao Mu, Shanghai (CN); and Congmin Bai, Shanghai (CN)
Assigned to Telenav, Inc., Santa Clara, CA (US)
Filed by TeleNav, Inc., Santa Clara, CA (US)
Filed on Mar. 3, 2023, as Appl. No. 18/117,273.
Prior Publication US 2024/0295402 A1, Sep. 5, 2024
Int. Cl. G06T 7/80 (2017.01); G01C 21/30 (2006.01); G06T 7/70 (2017.01); H04N 17/00 (2006.01); H04N 23/90 (2023.01)
CPC G01C 21/30 (2013.01) [G06T 7/80 (2017.01); H04N 17/002 (2013.01); H04N 23/90 (2023.01); G06T 2207/20212 (2013.01); G06T 2207/30168 (2013.01); G06T 2207/30256 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A navigation system comprising:
a control circuit configured to:
capture a sensor data stream provided by optical sensors,
extract lane lines, a horizontal line, and a vertical line from the sensor data stream,
determine a distortion coefficient of the sensor data stream from a principal point, the lane lines, a first set of vanishing points of the horizontal line, and a second set of vanishing points of the vertical line, wherein the principal point is located at an intersection of the horizontal line connecting the first set of vanishing points and the vertical line connecting the second set of vanishing points,
optimize an extrinsic parameter and an intrinsic parameter based on the extract of the lane lines and the distortion coefficient, and
compile optimized parameters including the extrinsic parameter and the intrinsic parameter; and
a communication circuit, coupled to the control circuit, configured to receive an optical sensor alert, when the optimized parameters are below a threshold, for displaying on a device.