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