1. A method of evaluating a bi-chrome digital image generated by an imaging device, the method comprising: generating an image with a hand-held imaging device, the image having pixels of a first color and a second color; dividing the image into a first area corresponding to a first portion of the image and a second area corresponding to a portion of the first portion of the image; determining information on the particle size and the particle location of particles of the first color contained in the image; each particle comprising contiguous pixels of the first color; developing a first value corresponding to the percentage of the first area covered by particles of the first color; developing a second value corresponding to the percentage of the second area covered by particles of the first color; and determining if the image is unacceptable based on predetermined objective criteria and the first and second values.