Patent ID: 8052598
Filing Date: 2011-11-08
Classification: A61B,G06T,H04N

Abstract:
1. A method for calibrating an endoscope, the method including: acquiring a first calibration image at a first calibration focal length; determining a radius of a first calibration image boundary corresponding to the first calibration focal length for the first calibration image, wherein the radius of the first calibration image boundary corresponds to a first calibration magnification of the endoscope; acquiring a clinical image at a clinical focal length, wherein the first calibration focal length is different than the clinical focal length; determining a radius of a clinical image boundary corresponding to the clinical focal length for the clinical image, wherein the radius of the clinical image boundary corresponds to a clinical magnification of the endoscope; and comparing the radius of the first calibration image boundary to the radius of the clinical image boundary to determine a change in magnification of the endoscope.