| 摘要 |
PROBLEM TO BE SOLVED: To provide an efficient method of computing gamma correction tables. SOLUTION: The efficient method of computing gamma correction tables includes a step (a) of determining a nonlinear transform between input values and output values, the nonlinear transform having adjustable parameters, a step (b) of determining at least one approximation equation to the nonlinear transform, having coefficient values ci , a step (c) where for each coefficient value ci , all of the coefficient values over a range of the at least one adjustable parameter are grouped together and an approximation to each grouping is fit to get a respective coefficient approximation equation, a step (d) where coefficients for a given value of the at least one adjustable parameter are then computed using the coefficient approximation equations, a step (e) where transform functions are then computed using the computed coefficients and a simplified mathematical formula, and a step (f) where the computed transform functions are stored in a conversion table.
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