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You are in for a night-time trip to one of the most secret places on the earth – until 23 years ago. The former Stasi headquarter is only 2 subway stations east of my home and I quite like the morbid, spooky atmosphere there. It’s a really huge areal, lots of office space and other buildings. Some of them are used as a museum and as the archive for all the Stasi files. Others are rented out or are simply empty.
My image missed some details in the shadows. I used a modified “burn with a layer in Overlay Mode” technique to get a bit of light into them. Instead of painting on the layer I used the L-part of the LAB colour model. I got the idea for this from the Darktable Blog.
UPDATE Mar 18: There is a nice way to use the histogram with selections. Select the dark region and look at the histogram – it shows only the data from the selection. The histogram tool is “selection-sensitive”.
Thanks to GIMPel for the tip.
00:30 The Stasi Headquarter
05:00 Start of the image processing
05:20 Rotate the image – what is vertical?
09:40 Planning where to work on the shadows
10:00 Measure the darkness with curves tool
10:45 A quick try with the curves tool
11:30 A layer in Overlay Mode to brighten shadows up
12:00 Decomposing the image to get the “L” from LAB
14:30 Invert the colours
14:50 Generate a layer mask
15:50 Constructing the “Lighten Only” layer
17:00 Optimizing the effect
17:50 Blurring the overlay layer improves the effect
22:30 Compare to simple burning
27:45 http://darktable.org gave the idea to this
Meet the GIMP Video Podcast by Rolf Steinort and Philippe Demartin is licensed under aCreative Commons Attribution-Share Alike 3.0 Germany License.
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