Patent ID: 7667880

Claim:
A method, comprising: performing the following in a computer: generating an analytical model of a digital picture workflow, wherein the workflow is executable to convert an original digital image to a corresponding projected image projected onto a screen using a film projector, wherein the analytical model comprises a negative film model which models the behavior of the color negative film when the color negative film is exposed to light by a recorder, wherein the model is dependent, at least in part, on a film characteristic curve of the negative film, wherein the film characteristic curve indicates a relationship between an amount of exposure and a corresponding density of the negative film, and wherein the characteristic curve is determined using a method comprising: receiving a status M film characteristic curve, a spectral dye density curve, a standard pixel value, and a standard density value; determining, based at least in part on the spectral dye density curve, a relationship between a status M density value of the status M film characteristic curve and a dye amount; and calibrating the relationship using the standard pixel value and the standard density value, wherein the calibrated relationship is usable to determine an actual dye amount based on an actual exposure level of the negative film; selecting a set of input pixel values; determining a set of output pixel values using the set of input pixel values and the analytical model; and generating a look-up table by associating the set of input pixel values with the set of output pixel values; wherein the look-up table is used to preview digital picture content.