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43 | NEC DISPLAY WALL CALIBRATOR - USER’S GUIDE

Custom Gamma Curve dialog

The Custom Gamma Curve dialog is accessed by clicking the Edit.. button in the Gamma Curve section of the Edit

Calibration Target dialog.

Advanced response curves can be selected from presets or custom curves can be created by importing a table of

values.

The following preset curves are available:

• sRGB - A curve based on the sRGB specication that includes the offset, transition and slope components.

• L* - A curve based on L* in the Lab specication. The L* curve is intended to be more perceptually uniform

than a simple gamma value curve.

• Video - A curve based on the SMPTE-170M specication for NTSC that includes the offset, transition and

slope components. Also suitable for PAL, SECAM and HDTV applications.

• SMPTE-240M - A curve based on the SMPTE-240M specication for 1125 line HD video that includes the

offset, transition and slope components.

Custom curves can be created and imported into NEC Display Wall Calibrator by creating a text le with a list of

numerical values. The text le must conform to the following specications:

• Must contain between 3 and 256 values.

• Each value must be on a separate line.

• The rst value must be 0.

• Values must be monotonically increasing.

When imported, the values will be automatically scaled and interpolated to create a Target curve.

Note: The Custom Gamma Curve option will not be available if the current Calibration Method is set to Use RGB Gains in the

Preferences.

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NEC Display Wall Calibrator Guía de usuario Pagina 43