1. A method of evaluating an image generated by an imaging device, the method comprising: generating the image with a hand-held imaging device, the image having pixels of a first color and a second color; determining information on a particle size and a particle location for each of a plurality of particles of the first color contained in the image, each of the plurality of particles comprising contiguous pixels of the first color; developing a first value corresponding to the number of particles of a first size, wherein the first size corresponds to a first range of sizes; developing a second value corresponding to total area of the particles of the first size; determining a third value corresponding to an average size of particles of the first size; and determining if the image is unacceptable based on predetermined objective criteria and the first, second, and third values.