Abstract
A new objective noise evaluation method has been already proposed and successfully applied to noise evaluation for electrophotographic digital color copying machines. It is characterized by two kinds of metrics (non-uniformity and dot structure noise) based on the responses from a cooperative human vision model. In order to clarify its performance further,this paper applies it to noise evaluation for monochrome patch images (single-colored and multi-colored images) outputted from a color ink-jet printer. Consequently, the following results were obtained: (1)it claimed that the image noise decreases with an increase of the printer's resolution; (2)the correlation coefficients between the objective and subjective evaluation scores were 0.951 - 0.989 except for the dot structure noise for single-colored images. These results suggest that the noise evaluation method is e.ective irrespective of printer.s dot-forming methods. Moreover, it predicted that the resolution required for ink-jet printers is more than 3600×3600dpi under ideal conditions.
