I’ve written a simple script that takes a folder of RAWs and writes an initial PP3 file (or appends to a current PP3) with the correct Lens Correction Profile information, for example:
The idea is that rather than having to manually apply a profile to each picture, I can select the correct profile depending on the focal length of the picture. It’s limited but the looks-up works.
The problem I have is that other (non LCP) config values change in the PP3 when I manually apply the LCP to a RAW image in the the GUI.
I have tried both
starting with an initial PP3 file containing just a LCP profile and loading that up in RawTherapee
appending the LCP config to a default PP3 already genearted in RawTherapee.
In both cases these 2 outputs are identical (suggesting that a default profile is applied to a RAW that has an incomplete PP3 spec). However they differ to loading the RAW in the GUI and applying the same LCP file manually.
Any ideas why this might be - and assuming the GUI is doing the correct thing, how can I batch set the LCP?
Hi! Another idea might be using your script as a custom profile builder in RawTHerapee, and adding the section with the LCP info on top of whatever profile was selected as default (or based on any other rule). That’s what I did with my RTProfileSelector (code available on GitHub): RTProfileSelector - RawPedia
So I’m guessing when I create a partial pp3 profile file (containing only an LCP profile), when I load the image in the GUI, the rest of the values are given defaults - just as with Fill Mode as described in the link. You’re right that Preserve mode sounds more like what I want - i.e. I apply the Default profile (or whatever else I want) and then at the end tweak only for Lens correction.
It looks like the default values used to fill-out a partial profile containing only a lens correction, are different to those that you get just by selecting the Default Profile and then applying a Lens Correction in the GUI. I was hoping they’d be identical!
Only problem with the method you describe is that it is the same as selecting a Lens Correction Profile in the GUI - i.e. I have to do it for every file which is what I’m trying to avoid with a batch based command?
Currently in Fill mode missing settings are set with hard-coded defaults (as described in rawpedia). We could discuss whether it’s useful to replace them with values of ‘Default’ profile (which is not hard-coded) instead. Sounds like a not so bad idea to me… @Morgan_Hardwood : what’s your opinion?
If you want to set a lcp for a lot of files at once, you also can select the files in RT file browser and set the lcp.
I don’t have access to a computer running OS X, but it’s easy enough for you to check: all you need is a C++ 11 compiler as there are no compilation dependencies (though you will need to install ExifTool, which I suppose is available on OS X). If you do try to compile and use it, please report back to us as I’m curious on how portable the source code is.
Thanks