Camera Calibration Archives

Agisoft Lens User Manual

Posted on June 29, 2018 by AirGon Support

The Agisoft Lens User Manual provides information and guidance on the use of Agisoft Lens. Agisoft Lens is an automatic lens calibration software, which uses an LCD screen as a calibration target. It supports estimation of the full camera calibration matrix, including non-linear distortion coefficients. Estimated calibration parameters can be saved in human readable file…

Converting Focal Length from Pixels to Millimeters to use in Bentley Context Capture

Posted on May 9, 2018June 20, 2022 by AirGon Support

The focal length field in ContextCapture requires a focal length in mm instead of pixels. To convert a known focal length in pixels to mm: F(mm) = F(pixels) * SensorWidth(mm) / ImageWidth (pixel). For an X4S, the image width in pixels is 5472. Context Capture indicates the sensor width is 13.2 mm, so the equation…