| 摘要 |
<p>The gamma curve generation method of the invention selects each set of three consecutive control points among multiple consecutive control points (Ca-Ci), forms a cubic curve passing through the selected three consecutive control points, and combines all formed cubic curves (A-D) to generate a gamma curve (γ). The selected three consecutive control points are set to a first control point, a second control point, and a third control point in a sequential order. Each cubic curve is formed to pass through the first control point, the second control point, and the third control point and have a tangent of a certain gradient (G) at the second control point resulting from a linear combination of a gradient (G12) of a straight line connecting the first control point with the second control point and a gradient (G23) of a straight line connecting the second control point with the third control point as defined by the equation
This arrangement of the invention demands less amount of computation and desirably reduces the required circuit scale.
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