Luminous Landscape Forum

Raw & Post Processing, Printing => Adobe Lightroom Q&A => Topic started by: Remo Nonaz on March 10, 2014, 10:10:49 am

Title: Photoshop Curve Converter
Post by: Remo Nonaz on March 10, 2014, 10:10:49 am

I have a number of curves that I have created in Photoshop for printing carbon ink on glossy paper in varying tones. I would like to add these to Lightroom but the file types are different in the two applications. There is a curve conversion tool available for MAC OS that will convert one file type to the other.

Does anyone know of a similar application that can be used in a Windows environment?

Title: Re: Photoshop Curve Converter
Post by: john beardsworth on March 10, 2014, 10:24:31 am

At first glance your question appears strange, so provide a link to the Mac converter so we can tell what type of files you're talking about.

Title: Re: Photoshop Curve Converter
Post by: Remo Nonaz on March 10, 2014, 11:05:49 am

There is a video discussing this at http://www.youtube.com/watch?v=k5bz-DTbP3s, or you can go to the Apple App store at https://itunes.apple.com/ca/app/curvesconverter/id590353436?mt=12.

I understand that I could recreate the curves in Lr by estimating the curves in the curves panel, but it would nice to be able to take the completed .acv curves and convert them to the preset files that Lr requires.

Title: Re: Photoshop Curve Converter
Post by: john beardsworth on March 10, 2014, 11:40:45 am

OK, so it does convert a Photoshop curve file to a Lightroom preset. Well, before now I've never heard of anyone converting them, so I'd be surprised if there was a Windows equivalent out there. You might be able to save some effort by hacking a Lightroom template file, but I suspect you'll be better off recreating them.

Title: Re: Photoshop Curve Converter
Post by: Remo Nonaz on March 10, 2014, 11:59:59 am

I found exactly what I was looking for http://fredrikforsberg.se/acvconverter/ (http://fredrikforsberg.se/acvconverter/).

If you look at the screen shot, which is a partial list, you can see that each point on the curve is defined. This could be handy if you need to make a very minor tweak. Instead of changing the actual curve, just increase or decrease the values accordingly and re-save.

Title: Re: Photoshop Curve Converter
Post by: john beardsworth on March 10, 2014, 12:20:52 pm

Well done - your Google is better than my Google!

Title: Re: Photoshop Curve Converter
Post by: digitaldog on March 10, 2014, 12:27:51 pm

Do we expect curves built in Photoshop to produce the same results using the ACR engine in LR? I'd expect there would be differences in the results.

Title: Re: Photoshop Curve Converter
Post by: john beardsworth on March 10, 2014, 12:46:08 pm

Sure, I'd certainly expect differences, but it seems as good a starting point as any.