The Synth module generates physically correct diffraction and diffusion of point lights (such as stars) in your image, based on a virtual telescope model.
Besides correcting and enhancing the appearance of point lights (such as stars), the Synth module may even be 'abused' for aesthetic purposes to endow stars with diffraction spikes where they originally had none. It is worth noting that any other tools on the market today simply approximate the visual likeness of such star spikes and 'paint' them on. However the Synth module can physically model and emulate most real optical systems and configurations to obtain a desired result.
While synthetic PSF augmentation has since been used on Hubble data by the Hubble Heritage team, please note that the use of this module on your images falls outside of the realm of documentary photography and should preferably noted when publishing your image.
I'm relatively new to image processing and just wanted to say how straight forward and powerful StarTools is.
When multiple star samples are provided, the SVDecon module will operate in the most advanced way.
Select the 'decode the data from a Base64 string (base64 decoding)' radio button.
You can convert everything you see to a format you find convenient. Give it a try!