1. An image evaluation method for evaluating a dot in an image produced by an imaging apparatus that generates a two-dimensional image on a support medium, said image being formed by a plurality of dots having a predetermined dimension arranged in a main scanning direction and a sub scanning direction at predetermined pitches of at least 2.5 times the predetermined dimension of the dots, the method comprising the step of: evaluating a dot position deviation in the sub scanning direction by measuring a dot position of each dot in the image.