Patent ID: 11908165
Assignee: BNSF RAILWAY COMPANY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A system for field calibration of an image capture module, comprising:
a vehicle having a beam for orienting components of the system for field calibration while the vehicle is in motion; and
an image capture module operably coupled to the beam, comprising:
a camera configured to capture images of a target disposed proximate railroad tracks; and
a memory configured to store the captured images of the target;

wherein the image capture module is configured to perform the field calibration of the image capture module by:
capturing, via the camera, a first image of a target;
initializing a vehicle encoder operably coupled to the vehicle with a vehicle encoder rate;
adjusting a contrast between two pixels identifying the boundary of light and dark portions of target;
comparing the number of lateral pixels to the number of longitudinal pixels; and
adjusting the vehicle encoder rate until the number of lateral pixels matches the number of longitudinal pixels.