New features are being introduced quite regularly. Here is a list of main features:
- Native image format support
- Unsigned 16-bit FITS files (other FITS are converted to this format on-the-fly)
- SER files
- AVI and many other film files, their support is being dropped in favour of SER.
- Image conversion (to the native FITS format only)
- Supported input types: 8-bit and 16-bit BMP, TIFF, JPEG, PNG files, NetPBM binary images, RAW DSLR images.
- Pre-processing of images with multi-channel offset, dark and flat images
- Image registration; supported methods:
- Global star alignment (rotation + translation)
- Translation using DFT centered on an object, generally used for planetary images
- Translation using PSF of a star, generally used for deek-sky images
- Manual translation with two preview renderings of the current image with reference frame in transparency
- Registered sequence export
- Supported export file formats: Siril FITS sequence, SER sequence, uncompressed AVI files, GIF up to 0.9.4, MP4 and WEBM web publising video formats since 0.9.5
- Optionnal cropping and resizing of the exported images
- Image stacking
- Summing
- Median
- Percentile clipping
- Sigma clipping
- Median sigma clipping
- Winsorized sigma clipping
- Linear fit clipping
- Pixel minimum/maximum
- Enhancement and processing of final images
- Lightness/contrast cursors on each layer, different scaling modes (linear, log, square root, squared, asinh, histogram equalisation), negative and false colour rendering and clipping
- Background removal tool
- Cosmetic correction tool
- A command line for various processing functions, only available from the GUI, see the list of available commands.
- A star finding algorithm with PSF information
- Image compositing tool, combining and aligning multiple layers (1 to 6) with custom colours into a resulting image, with luminance layer support