Siril

Siril: Free & Open-Source Astrometry Softwares

Free, open-source astronomical image processing software for astrophotography cameras, offering stacking, calibration, deconvolution, and more.

What is Siril?

Siril is a free, open-source software application designed specifically for processing astronomical images from CCD cameras, DSLRs, and other astroimaging equipment. It is available for Linux, MacOS, and Windows.

Some of the key features of Siril include:

• Importing and handling RAW files from popular astrophotography cameras like ZWO, QHY, Atik, and more
• Image calibration - bias, dark, and flat-field correction
• Image stacking - combine multiple exposures to reduce noise and increase detail
• Alignment and integration of RGB channels
• Histogram adjustments with levels and curves
• Noise reduction through wavelet decomposition
• Sharpening, deconvolution, and unsharp mask
• Photometric color calibration and measurements
• Annotation and region of interest tools
• Scripting for automating workflows

The interface of Siril aims to provide an efficient workflow, with different toolbars and views for task-focused functionality. It can handle individual as well as batch image processing. And the software is available in multiple languages.

So in summary, Siril is suitable for all levels of amateur astrophotographers looking to move beyond basic image capture and perform calibration, stacking, correction and enhancement of their images. The open-source nature of Siril allows advanced users to expand on its capabilities as well. It works nicely as a free alternative to paid options like PixInsight for astronomical image processing.

Siril Features

Official Links