Spatial Calibration for Accurate Long-Distance Measurement Using Infrared Cameras
Abstract
This report introduces a spatial calibration procedure for infrared optical systems. This particular procedure was developed for cases where camera systems are required to be focused at distances beyond 100 m and thus requiring a large calibration target area that may be too large for conventional methods in laboratory environments. As with any calibration technique, the effects of lens distortions must be addressed to reduce errors in spatial photogrammetric measurements. Applications of this procedure include optical navigation, precision object tracking, or any situation where relative distances between objects are to be measured in an outdoor, long-distance environment. The proposed method has been demonstrated to accurately quantify the intrinsic parameters of a camera system as well as fit models for the spherical/radial and tangential distortion fields. Simple modifications to the procedure allow for the same approach to be used to spatially calibrate cameras for other spectra including daylight cameras.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 05, 2023
- Accession Number
- AD1189567
Entities
People
- Ahmed M Hassan
- Arhum Mirza
- Benjamin Abruzzo
- Mihaly Horvath
- Ryan Decker
- Steven Manole