Measuring method and apparatus of photographic parameter and computer memory product

摘要

A method of measuring an unknown photographic parameter (distortion coefficient or focal length) from an image taken by a camera of which photographic parameter is unknown. An image to be measured is entered, the photographic parameter to be measured (distortion coefficient or focal length) is designated, an image region necessary for measuring the photographic parameter in the image to be measured is designated, a characteristic relating to the photographic parameter to be measured is extracted from the designated image region, and the photographic parameter is calculated according to a specified operation processing on the basis of the quantity and position of the extracted characteristic.