Fujitsu C150-E187-01EN manual Gamma Pattern Editing

5.4Gamma Pattern Editing

♦Graph Area

The graph area is a 256-dot × 256-dot white square area bordered by black lines, where the relationship between the input values of 0 to 255 (x axis) and output values of 0 to 255 (y axis) is indicated in blue lines. Each graph dot represents one division (unit).

♦Gradation

The input is displayed in black and white in 256 single-dot steps from 0 at the left border to 255 at the right border. The gama function of the scanner is displayed. After saving it, the displayed (gray scale) gama function is fixed and constant. The output values are displayed in single dots in relation to the input values and the brightness of the output equipment is displayed. To ensure accurate display, the display must be set for "True-Color" or greater.

♦Gamma

Calculation of the output values is based on the value γ entered in the edit box; the graph and the gradation are then displayed. The values that can be input are integers greater than 0 or fractions.

<<Formula>> Output = (input ÷ 255)γ × 255 (Input = 0 - 255)

♦Free Edit

Designates whether to enable editing of the graph area directly using the mouse cursor.

If this box is checked, the gamma pattern input edit box cannot be used and only editing using the mouse cursor is supported.

♦Smooth

Designates whether to smooth edited curves. This setting is only valid when Free Edit is selected. In this setting, the curved lines drawn by the mouse are automatically smoothed. This is reflected in the graph and gradation display.

♦Reverse

Designates whether to reverse black and white. When this box is checked, the current output values are converted to (255 - output values).

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