Abstract: The present invention relates to a method for verifying the authenticity of an image recorded in a person identifying process and belonging to a person to be identified, the method comprising the steps of recording a sequence of consecutive individual images of the person and determining the authenticity of the recorded image if at least in two consecutive individual images of the sequence intrinsic movements are detected, i.e. movements which are carried out by the person to be identified consciously or unconsciously and without changes in his or her center of gravity.

Abstract: An image guided surgery system comprises an endoscope (11) with an image pick-up apparatus and a posi ion measuring system (10,21) for measuring the position of the endoscope (11). A data processor (2) is arranged to process image data according to the measured position of the endoscope and derive updated image data from the processed image data and imae information from the image pick-up apparatus. The processed image data are derived from said image data and said image information from the image pick-up apparatus and said measured position. For example the image data are CT or MRI images or the image data represents one or several anatomical landmarks in the body of a patient (12) to be examined.