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Lookup Table Content Definition Methods

Methods to define the content of a lookup table

The Coaxlink Driver provides four methods to define the transfer function of a lookup table.

  • Response Control
  • Emphasis
  • Threshold
  • Table

Response Control Method

This method defines the transfer function of a lookup table by means of four parameters: Contrast, Brightness, Visibility and Negative.

The Contrast and Brightness parameters provide controls similar to the brightness and contrast controls of a television monitor. For more information, refer to Contrast Parameter and Brightness Parameter.

The Visibility parameters provides control to smoothly reshape the transfer function to cover the full input range. For more information, refer to Visibility Parameter.

The Negative parameter allows transforming an image into its negative image. For more information, refer to Negative Parameter.

Emphasis Method

This method defines the transfer function of a lookup table by means of two parameters: Emphasis and Negative.

It allows transforming an image using a power-law expression also known as γ – Gamma – function. For more information refer to Emphasis Parameter.

The Negative parameter allows transforming an image into its negative image. For more information, refer to Negative Parameter.

Threshold Method

This method defines a double threshold transformation law by means of five parameters: SlicingLevel, SlicingBand, LightResponse, BandResponse, DarkResponse.

For more information, refer to Threshold Method Parameters.

Table Method

This method defines the transfer function of a lookup table in a tabular form.