Episode 198: Darktable revisited

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darktable is an open source photography workflow application and RAW developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.”

I cant say it better than this bit from their page.

I had tested darktable in 2010 and found it promising – but stayed with f-spot and later Shotwell. But now I’ll switch to darktable.

These 42 minutes are a rigorously cut down version of my nearly 2 hours long walk through darktable – I was distracted so much by the endless modules and possibilities that I forgot the time. This will not be my last darktable video, I’ll try to focus a bit more on usable stuff in them. ;-)

You can find Pascal’s videos at pcode.nl, you have to search a bit for them.

And here is a collection of darktable videos, recommended by our Bert (rayadagio).

The TOC

00:00:00 Start and book savings announcment
00:02:32 Darktable startup
00:03:50 Importing images and grouping them
00:06:10 Copying and moving images
00:09:00 XMP files
00:10:30 Tagging
00:11:35 Geotagging
00:15:00 Rating and marking images on the Zoomable lighttable
00:16:20 The manual
00:18:30 The darkroom
00:21:00 The interactive histogram
00:21:40 Undo with the history stack
00:22:20 Lots of modules
00:25:40 Cropping and rotating
00:27:00 Zooming in the darkroom
00:29:30 Non destructive editing
00:30:20 Levels and curves
00:32:30 Stacking curves (and other modules)
00:33:20 Color correction
00:34:20 Monochrome conversion with color filters
00:35:30 Correction lens errors and lots more modules
00:39:00 Exporting the image
00:42:00 EOF

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Episode 076: UFRaw revisited

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I got a mail from Pascal de Bruijn, the man behind the p-code blog. He knows a lot about colour management, RAW processing and so on. He had seen episode 11 and pointed me to some errors and stuff that is new in UFRaw. So I read his mail and had a look.

This is really a fast forward through the program, nothing really in depth. It can be a guide for experimenting. If you know not much about RAW processing, have a look at episode 11. It covers some basics about the technology behind it.

I used the UFRaw version compiled by Pascal. You can find it for Ubuntu on his site – other OS have to look around. Start with the UFRaw home page.

I’ll have an eye surgery tomorrow (lens replacement) and had not much time to prepare this episode. TOC and more will follow. And I’ll be off screen for some days until I am allowed to read again.

The TOC

0:00 Intro
0:26 Statistics
1:50 Pascal’s e-mail blog.pcode.nl
4:16 – Fire up UFRaw!
4:30 – Color matrix vs. Color profile
5:57 — Working Color Space Profile
6:33 — Rendering Intent Option
8:50 – Details Restauration & Highlight Clippings
10:13 – Import base curves from .NCV
10:26 – Auto black point correction works perfectly!
11:13 – New features in new version of UFRaw
11:36 – LensFun
14:00 – Fix cromatic aberration
15:57 – Optical Vignetting
16:23 – Lens distortion – Panotools
17:16 – Lens geometry
19:18 Outro

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