Method and computer program product for automated defect detection during borescoping of an engine

A method for automated defect detection during borescoping of an engine, in which a video borescope is inserted into the engine in such a way that, during rotation of an engine shaft, engine blades of an engine stage which are secured to the engine shaft are moved successively through the image region of the video borescope, the method comprising:

• identifying a possible defect on an engine blade by image recognition on the basis of a frame generated by the video borescope;
• detecting the movement of the engine blades in the image region of the video borescope by comparing in each case two successive frames;
• tracking the possible defect on the video image along the detected movement by optical image recognition on the basis of the successive frames used for detecting the movement;
• and
• in a condition where a trace of the possible defect on the video image corresponds to the detected movement in terms of direction and speed over a predefined length, identifying the possible defect as an actual defect.