A method for image recognition. In the method, a section of an element is
imaged while the element is at a first speed to obtain a first image
pattern. The section of the element is also imaged while the element is
at a second speed to obtain a second image pattern. The first speed
differs from the second speed. In addition, the apparent speeds of the
element in the first image pattern and the second image pattern are made
to appear approximately the same.