| 摘要 |
Disclosed is apparatus and procedure for automatic set up and/or maintenance of process control parameters for good color balance, color fidelity, and tone reproduction by exploiting all of the available process parameter adjustments based on several density measurements in each of a plurality of color separations. Density measurements are made of a plurality of color separations across a range of densities for each color separation. Process control parameter adjustments are calculated utilizing the known average human relative visual sensitivities to density and color shifts at various density levels, to achieve an optimum set up compromise over all the colors. If certain colors or densities are particularly important in the scene of the original document, those colors or densities are more heavily weighted in the adjustment calculations. The adjustment procedure is preferably iterated a few times to attain convergence to the "best" set up.
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