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Camera Calibration and why it is important

From Thursday, 02 July 2020 -  9:00
To Friday, 02 July 2021 -  5:00
Location* Online
Contact* This email address is being protected from spambots. You need JavaScript enabled to view it.
 
EVENT DETAILS

Accurate camera calibration has always been a prerequisite for photogrammetric measurement, irrespective of whether the application area is topographic mapping, engineering metrology or, more commonly nowadays, 3D model generation from imagery recorded using drones/UAVs. Traditionally, calibration has been recognised as a distinct operation within the photogrammetric processing pipeline, even as the process of recovering camera parameters has evolved from laboratory calibration through to on-the-job self-calibration. With the increasing adoption of so-called structure-from-motion (SfM) based software systems for multi-image photogrammetric orientation, which could be described as ‘black-box’ operations, there has been a tendency for users who are not specialists in photogrammetry to under appreciate the requirements for a reliable and accurate camera self-calibration. Irrespective of whether camera parameter determination is implicit within the SfM processing or explicit within a separate camera calibration process, usually based on a self-calibrating bundle adjustment, due attention must be paid to factors such as camera internal stability, imaging network geometry and the use of constraints in the object space, be they ground control points or GPS-recorded camera station positions, or both. Moreover, there are questions to address regarding the weighting of constraints, and the selection of appropriate camera parameters so as to avoid excessive projective coupling/correlation, especially between the camera interior and exterior orientation parameters. This seminar will address these and other aspects of metric camera calibration and discuss their importance in the optimisation of accuracy and reliability in photogrammetric measurement.

 

CPD ASSESSMENT DETAILS FOR THIS EVENT:

CODE - SSSINSW0207

ENGINEERING - 0

MINING - 0

CAD - 0

SURVEY PRACTICE - 1

TOTAL POINTS - 1

 

Date Assessed - 18/06/2020

Assessed By -

Julie Fairman