Dynamic PSF (for registration settings) [Siril 1.0]

Dynamic PSF (for registration settings)

Adjust registration settings⚓

In some cases, it may be necessary to adjust the stars detection to help registration process finding more stars. This can be done by opening the Dynamic PSF dialog

List mode Interactive mode

1 2 3 4 5

1 Radius
2 Threshold
3 Roundness
4 Adjust value
5 Find stars

1 Radius⚓
Size in pixels of the search box.
The larger the stars, the larger should this value be, although with the latest implementation of the star detection algorithm, the most suitable box size is automatically determined for each star.
2 Threshold⚓
Threshold value above the noise for stars detection.
Note
The default value for threshold is 1.00.
The median and bgnoise values of the image are determined, then the threshold is: median + [threshold] x 5 x bgnoise.
Any local maximum above this threshold value is considered a potential star candidate and further analyzed.
Lowering this value will enable to detect more stars but will spend longer time on each image.
3 Roundness⚓
Threshold value of star roundnesses. Decrease this value if your stars show small trails.
Warning
Ensure you have a good reason to change this value because it may degrade the star detection.
4 Adjust value⚓
Ticking this box enables to automatically resize the initial search box radius based on image sampling, if it can be computed from image information, i.e. if focallength and pixel size values are known.
5 Find stars⚓
Once you have changed the values listed above, pressing this button will launch the stars detection process and report how many stars are found with the current settings.

Dynamic PSF (for registration settings)

Adjust registration settings⚓

Note

Warning