I haven't tried these new image features at all, nor do I know how well exposed it is in the scripting API in the new version, but Resolve does have a Scripting API I've used for batch processing (of videos) in the past, I'm guessing this gist will soon be updated for version 21 then you can take a peek there: https://gist.github.com/X-Raym/2f2bf453fc481b9cca624d7ca0e19...