Finding the aspect-ratio of an imaging system

Aspect-ratio is a fundamental parameter of an imaging system. It determines the extent of nonuniformity in sampling. Video signals guarantee a one-to-one match between the camera lines and the lines in the image buffer. The horizontal arrangement of pixels, however. undergoes a resampling due to the digitization process. The vertical spacing between lines is given by the vertical distance of the photo elements on the sensor array. The relationship between the vertical and horizontal spacing is determined by the aspect-ratio. The author proposes a technique that uses power spectrum of the image of two sets of parallel lines to determine the aspect-ratio of the system