Tuesday, February 3, 2015

3D Cube FITS & Debayer support in KStars

Recently I was finally able to close BUG#305960 where a user requested support for 3D Cube FITS support in KStars. The FITSViewer tool always supported monochrome images since its inception, as this is what most CCD cameras in astronomy use. But single-shot color CCDs and DSLRs' utilization within the astrophotography world kept growing over the last few years.

Now the FITSViewer tool can display any 2D (monochrome) & 3D (color) cube FITS, and while most of the operations in KStars are geared toward single-channel images, the migration to 3 channel support was relatively smooth.

In addition to the 3D cube support, the FITSViewer tool can debayer images captured from color cameras and stored in RAW format with a specific color filter array (CFA).

DSLR users will gladly welcome this feature as they can inspect their color RAW images in color and may adjust the debayer parameters to produce a clear image of their target. Internally, KStars converts the debayerd image to a 3D Cube FITS without changing the RAW data at all. While the user may save the file as a 3D Cube FITS, it is not recommend. In fact, the debayer functionality should only be used to inspect the image, and the RAW image should always be processed under a dedicated astrophtography tool like PixInsight in order to carry out proper calibration procedure before any integration and registration processes.

In addition to DSLRs, the SBIG CCD INDI driver now also supports color CCDs. More INDI CCD drivers will have color support soon.

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