Color FITS files generally exist in two main types: True Color FITS images and Bayer Pattern FITS images. 


The Split Color FITS files dialog allows you to separate both True Color and Bayer Pattern FITS images into three individual monochrome FITS files, representing the red, green, and blue channels. This allows photometry to be performed on each color channel separately, avoiding inaccuracies introduced by interpolation and ensuring reliable magnitude measurements.



  1. To begin, choose the folder containing your Color FITS images. This is done by pressing the button with 3 horizontal dots next to the Source folder with Color FITS images field. This folder may include a mix of True Color and Bayer Pattern FITS images. Each image will be split into its respective red, green, and blue components.

  2. Next, specify where the separated channel files should be saved, using the Destination folder fields. The red channel FITS files will be stored in the TR folder, the green channel in the TG folder, and the blue channel in the TB folder.

  3. Click the Split button to start. Progress bars will display the status of the conversion.

  4. In case a source file cannot be converted, Phoranso will log the issue and provide details in a log file, that will be reported at the end of the process.

  5. Click Abort if you need to interrupt the conversion at any point.