Color calibration tool

First, we need performing a balancing of the colors of a linear RGB. Siril provides a tool of color calibration.

Two steps are necessary:

  • You must select a background area with no stars and click on "select" in the "black selection" frame. Click on "background neutralization" will neutralize the background by aligning median values.

  • In the second step, you need to select the "white selection" area. So, make a selection containing a nebula part and click on apply. Be warn that black selection MUST be always selected. However, your image must be cropped before in order to remove any frame that could misleading the tool.

See the complete operation process below

ProcedureColor calibration⚓

The colour calibration tool performs a balancing of the colours of a linear RGB deep-sky image.

Attenzione

Note that Background Equalization (now called Background Neutralization) has been moved in the calibration box because it is needed before any calibration.

Prerequisito

You must have an image in memory

  1. Open the Color Calibration menu

    Extra

  2. Neutralizing the background

    Select a background area

  3. Click on Use current selection

  4. Click on Background Neutralisation

  5. White reference

    Select a reference area for white balance

  6. Click on Use current selection in the White reference zone

    Extra

  7. Click onApply

    Extra

  8. Click onClose to close the dialog box

  9. Reducing green tint in processed images

    This tutorial shows how to remove the green tint in processed images using the graphical user interface.

    This function can also be accessed from the command line, with the rmgreen command.

    Open the Image Processing/Remove Green Noise... menu

  10. Click onApply then Close