Tuning the Degamma Feature

This section describes how to tune the Degamma feature to control the de-gamma lookup tables, which convert non-linear space data into linear space within a DC9400.

Before you begin

Make sure:
  • The details view shows the settings of the Degamma feature for a DC9400 project.

    For information about how to show the settings in the details view, see Tuning a DC9400 Feature.

  • The VTunerClient is connected to a VTunerServer that works with a DC9400.

    For information about how to set up a connection to a VTunerServer, see Setting Up a Connection to a VTunerServer.

Procedure

  1. In the Project Explorer view, select the DPU project.
    Then, the features supported for tuning are listed in the Features view.
  2. In the Features view, click Degamma.
    Then, the settings of the Degamma feature are displayed in the details view.
    Figure 1. Details View When the Degamma Feature is Selected

  3. In the details view of the Degamma feature, select the Enable Degamma check box to enable the degamma module.
  4. In the Degamma Value spin box, enter the de-gamma value.
  5. In the Segment Points table, use one of the following methods to specify the segment points for the six segments along the X-axis.
    • Double-click and edit a cell in the table to update a single segment point.
    • Click Edit and update the segment points in the prompted Edit Table dialog.

      The segment points must be specified in the same order as the table columns and separated by a comma (,).

    • Click Export to export the segment points to a .csv file, edit the file, and then import the updated segment points from the .csv file.

      The order of the segment points in the exported .csv file is the same as that in the table.

    The table excludes the first point and the last point, which are fixed to 0 and the maximum value, respectively.
    The difference between two consecutive segment points must be a power of two.
  6. In the Segment Steps table, specify the sampling point step in each segment.
    The methods of updating the Segment Steps table are similar to those of updating the Segment Points table described in Step 5.
    Each sampling point step must be a power of two.

Results

  • The tuning results are printed in the Console view in real time.
  • The image displayed on the VTunerServer side is updated.