| 摘要 |
A circuit for gamma correcting a video signal incorporates both linear approximation as well as a look-up table, in which the disadvantages of linear approximation, i.e., inaccurate representation of the gamma function, and of a gamma look-up table, i.e., low resolution at low grey levels, are minimized. The transfer function of the look-up table is chosen such that the inaccuracies of the linear approximation are compensated.
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