Delaboratory

eulu · **Joined:** Aug 06, 2012 **Posts:** 13

jacek wrote:

ProPhoto is wider colorspace than sRGB. So it may happen that your photo is overexposed in sRGB but not in ProPhoto. However, I set contrast in ProPhoto to 90% to avoid overexposing when converting later to sRGB

You may change it with slider in source image layer. The goal was to recover as many highlights as possible. The downside is that your photo is more "gray" by default, because it lacks full contrast. But it doesn't matter if you follow Dan Margulis way of postprocessing with curves.

Thanks I did notice that the contrast was down and was playing with it, but I have yet to read Margulis, which has quickly become top priority after playing around with Delab. This is exciting stuff! ;-)

jacek · **Joined:** Jun 02, 2011 **Posts:** 58

here is Dan Margulis video to show how LAB works

http://www.youtube.com/watch?v=KhfRynutmQM

eulu · **Joined:** Aug 06, 2012 **Posts:** 13

Thanks I will check that out. I've used the decompose to layers in Gimp to do LAB color "intensifying" for years, but never knew how to do anything more than that.. This is really cool beans..

jacek · **Joined:** Jun 02, 2011 **Posts:** 58

I was also used decompose in Gimp to use LAB and that's one of the reasons delaboratory has been created. Most people don't even know LAB decompose is in Gimp and they don't know why they would need it. There is a huge misunderstanding of the subject in the environment of open source developers, and that's why I needed to start from scratch, because they think that CMYK is "something to print" and LAB curves are for "fanatics". It's easier to show alternative solution than fighting with ignorance.

partha · **Joined:** Mar 14, 2011 **Posts:** 998

eulu wrote:

Not sure if I should post here in this thread but did some searching and nothing came up....

I am trying Delab .8 with DNG files on Win7x64 (with 4 gigs ram) with the Partha Gimp 2.8.1x64 and with a very minimal edit when I try to export from Delab to Gimp, I get a message "exporting final image failed - error during update images (probably out of memory). I click ok then get an error "D:\TEMP\TEMP/IMGP2641.tiff: Cannot open (in module: "TIFFOpenW")

Thanks
Todd

Edit: Should have mentioned this is also after adding the environment variable (tried both C:\Program Files\Gimp-2.8.1\bin\gimp-2.8.exe and C:\Program Files\Gimp-2.8.1\bin\gimp.exe)

Todd,

Like I mentioned, you don't need the environment variable since you are using my build.

Partha

eulu · **Joined:** Aug 06, 2012 **Posts:** 13

Thanks Partha.. Like I mentioned, you guys rock! :-)

Rod · **Joined:** May 16, 2010 **Posts:** 14719 **Location:** USA

Hey i am having trouble getting the tiff to export to Gimp-2.8 again.
Do i need to rename the folder "Program Files\Gimp-2.8.4" to "Program Files\Gimp-2.8" for this to work?

I tried the GR_EDITOR PATH with C:\Program Files\Gimp-2.8.4\bin\gimp-2.8.exe and that didn't work either.
I checked the C:\Users\rod\AppData\Local\Temp folder and the tiff image is there.

jacek · **Joined:** Jun 02, 2011 **Posts:** 58

Hello again,

I started new development phase of delaboratory few months ago, you can download working prototype for Windows here:

http://code.google.com/p/delaboratory/w ... pe20131020

please notice this version is not really usable, you can open RAW of other image, you can play with sliders and export final jpg, but essential functionality like curves is not there

it's released for people interested in the delaboratory development who want to see what's going on, testing it on different Windows system would be helpful, because I need to build strong, stable core first, then reimplement missing functionality from old versions