New Krita Videos – and a Kickstarter to help Krita

Ramón Miranda has published 4 short Krita tutorial videos as a support of the Kickstarter campaign to accelerate Krita development.

Krita is a Digital painting application for artists created by artists and is available for Linux and Windows. Maybe MacOS in future. It’s one of the Kickstarter goals for overfunding.

If you like Krita, throw some money at them. Money is so unpersonal, but it helps a lot. ;-) The intended 24 goals are on the web site of Kickstarter – and they look really worth to have!

Krita Kickstarter

Krita tip 01. Monotone image with Transparency Masks

Krita tip 02. Color curves with filter masks

Krita tip 03. Texturize your images. The easy way

Krita tip 04 Digital color mixer

Don’t forget that I’ll give away a copy of the Muses DVD by Ramón Miranda – if you want it, put a comment below Episode 199!

Episode 200 is under way, progress report are on the top of the side bar!

Episode 199: G’MIC

Download the Video! (33:10, 63MB)

No Companion File!

Watch at YouTube

G’MIC is a lot of things that do stuff with images. You have a stand alone program with a complete image manipulation and analysis programming language, an online service and a GIMP plugin that gives easy access to (nearly) the whole package. Don’t get G’MIC from other sources than their pages – the update cycle is so fast that package maintainers can’t keep up. The version recorded in the video is already outdated twice at the time of the publication.

G’MIC is mostly developed by Dr. David Tschumperlé of the GREYC, an institute at the University of Caen in France that is also part of the Centre National de la Recherche Scientifique (National Center for Scientific Research). So definitely no hobbyist project.

I met David and his friend and colleague Jérôme – also a scientist AKA Dr. Jérôme Boulanger – at the LGM in Leipzig. Very nice guys! See Pat David’s wonderful blog post for more images and a report.

You can find information about G’MIC at their site in the very good and complete manual, at YouTUBE from G’MIC and David, at Pat David’s Blog and all over the Internets.

The second part of the video is a promotion for Ramón Miranda‘s very good training DVD “Muses”. It goes through the whole process of learning Krita – a graphics program under Linux and Windows, which is much better for painters than GIMP – up to finishing a real digital painting. You can buy the DVD at the Krita shop, 32.50€ is comparable to other kinds of such DVDs and the proceeds support the Krita Foundation.

I got this one for free – and I will give it away! If you want to have it, write a comment to this blog post before Episode 200 is published. Get your mail address right (it will only be visible to me) and mention that you want the DVD. After the deadline I’ll have some supposedly innocent children draw a winner.

The TOC

00:00:00 Start of video
00:01:10 Installing the G’MIC Plugin for GIMP
00:03:00 Installing and using G’MIC as a stand alone program
00:10:00 G’MIC Online service
00:10:40 Using the G’MIC GIMP Plugin
00:13:40 Pencil Drawing emulation as an example
00:18:10 Film emulations and grain as an example
00:25:15 Spectral filters – Fourrier included
00:26:20 Plotting Graphs with G’MIC
00:26:50 Conclusion
00:29:20 Ramon Miranda’s Krita tutorial DVD
00:33:10 EOF

Meet the GIMP Video Podcast by Rolf Steinort is licensed under a Creative Commons Attribution 4.0 Unported License.
Permissions beyond the scope of this license may be available at http://meetthegimp.org.

Episode 198: Darktable revisited

Download the Video! (42:00, 80 MB)

No Companion File!

Watch at YouTube

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

Meet the GIMP Video Podcast by Rolf Steinort is licensed under a Creative Commons Attribution 4.0 Unported License.
Permissions beyond the scope of this license may be available at http://meetthegimp.org.

No Starch Press GIMP Books 30% off!

Aside

You know that I like the No Starch Press GIMP books – I even had my hand in the production of one of them. The other is always in reach at my desk. Over at Reddit there is a coupon code for getting 30% off of them – valid until May 6.

(I once got some $$$ and a crate of books from them for doing a technical review, but this is not paid by anyone for.)

Episode 197: The LGM 2014 Group Photo

LGM 2014 Group PhotoDownload the Video! (37:06, 124 MB)

Download the Companion File! (130 MB)

Watch at YouTube

I went to the Libre Graphics Meeting 2014 in Leipzig to get either a boost for my motivation or to find an end for this project. It turned out to be a booster.

It was a really good time – even with missing the first day and the (for me) most interesting talks because I had to work that day. Another day was spent at the Zoo with Pat David and his wife, more time in the coffee room, Milchbars and restaurants. All the time having good conversations and learning a lot.

And then I got the honors of shooting the traditional group image. I assume it was not my track record of famous group pictures but the 36 megapixel resolution of my D800 that led to that decision.

In this episode I cover the post processing of the image and how I blended my previously taken image into the group.

The TOC

00:00:00 Intro
00:01:14 The LGM Group Photo
00:04:05 Rotating the image
00:06:05 Adjusting contrast and brightness with the curves tool
00:09:23 Getting myself into the image
00:10:54 Registering the layers
00:14:38 Merging with a layer mask
00:17:55 Ways to change the brush size
00:18:50 Cleaning up the layer mask
00:20:38 Curves adjustments on a selection
00:24:28 Cropping the image
00:25:58 Sampling a fill colour out of the image
00:27:14 Sharpening with wavelets
00:31:12 Adding the SVG logo
00:34:04 Scaling down and exporting
00:36:38 Good bye!
00:37:06 EOF

Meet the GIMP Video Podcast by Rolf Steinort is licensed under a Creative Commons Attribution 4.0 Unported License.
Permissions beyond the scope of this license may be available at http://meetthegimp.org.

Episode 196: ENIAC and Me

ENIAC and MeDownload the Video! (42:02, 140 MB)

Download the Companion File! (3.8 MB)

Watch at YouTube

Some timing issues pushed this video back and back again in time – and now it’s Christmas! Have nice Holidays!

In this video I try to change history and put myself in an old image of the first electronic computer, the ENIAC.

The original image is an US ARMY Photo under Public Domain, downloaded from Wikimedia.

As this is intended to be the base for a class project, I don’t go into the depth of GIMP but try to cover a lot of ground on a beginners level. And of course I make some mistakes…..

Links and Notes:

Episode 163 – Curves
Episode 094 – Curves
Episode 083 – Grit and Grain
Episode 073 – Layers

Our Wiki also covers Layers and Curves.

The nice image of the Rolleiflex has been made bay Rid Sevilla from Hawaii Camera Style

The image in this post has been altered a bit more with the GIMP filter “Old Photo” under /Filters/Decor/Old Photo.

The TOC

00:00:00 Intro
00:02:04 Opening an image from the Web
00:03:02 Loading an image from disk and some mistakes to avoid when making your image
00:03:55 Getting an image into another one
00:04:30 Measure Tool
00:05:00 Scaling to the proper size
00:05:25 Copy and Paste between images
00:06:10 RGB- and Grayscale Mode
00:06:30 Save the image in XCF format!
00:07:54 Isolate the person from the background with a layer mask, the Free Hand Selection and a brush
00:10:10 Free Hand Selection
00:11:30 Undo
00:12:15 Tedious paint work
00:17:30 “Optimizing” the mask with the curves tool and a blur
00:19:30 Finding the right position and scaling a layer
00:22:15 Adding the Curves Tool to the Toolbox
00:23:20 The Curves Tool
00:26:30 Adding grit and grain by extracting the grain from the image
00:30:00 Bucket fill tool
00:31:08 Try stuff with a layer copy
00:33:06 Adding light and shadows
00:38:15 Summary
00:40:20 Move a stack of layers, keeping them aligned
00:41:10 Saving and exporting the image
00:42:02 EOF

Meet the GIMP Video Podcast by Rolf Steinort is licensed under a Creative Commons Attribution 3.0 Unported License.
Permissions beyond the scope of this license may be available at http://meetthegimp.org.

GIMP Magazine – Issue 5

GIMP Magazine 5

Issue 5 of the GIMP Magazine

It’s here, the fifth issue of the GIMP Magazine. Including a long and great tutorial by Pat David, who also takes over the job of the Cover Girl.

And of course we have the results ot the Meet the GIMP Summer Challenge in there – all participiants have earned a place in the magazine.

Episode 193 of Meet the GIMP! will be out late next week.

Episode 195: Whose RGB?

rgb
Download the Video! (24:09, 80.6 MB)

Download the Companion File! (14.8 MB)

Watch at YouTube

Colo(u)r ist the topic this time. You are in for a ride from the electromagnetic spectrum to the biology of color vision and the infamous Mantis Shrimp. (Link to the fabulous Oatmeal!)

Grassmann’s Law gives a clue how to create a color sensation in the brain by mixing up some wavelengths out of the spectrum. The CIE finally defines what is visible for a “Standard Observer” and Microsoft & HP (sRGB) and Adobe (Adobe RGB) build their color spaces on that foundation.

Elle Stone, Bruce Lindbloom and Cambridge in Colour help along the way, passing a Black Body emitting radiation according to Planck’s Law at 6500K just to give us a White Point.

Then I organize a shootout between sRGB and Adobe RGB – and I’ll stick to sRGB for the forseeable future.

Finally I cover the question of Intent while converting between different color spaces – Perceptual or Relative Colorimetric?

Links

Elle’s fine writeup about All the Colors.

The Color Space Viewer (at the bottom of the page)

Pascal’s tutorials about color management on Linux – really hands on:

https://encrypted.pcode.nl/blog/2012/01/29/color-management-on-linux/
https://encrypted.pcode.nl/blog/2013/11/24/display-color-profiling-on-linux/
https://encrypted.pcode.nl/blog/2013/04/14/display-profiles-generated-from-edid/

The TOC

00:00:00 Intro
00:00:15 Submit to GIMP Magazine
00:00:50 Light as part of the electromagnetic spectrum
00:01:43 Biology of color vision
00:06:14 World Champion of Color Vision: The Mantis Shrimp!
00:06:40 Grassmann’s Law – mixing colors from spectral primes
00:07:22 CIE 1931 Color Space – the standard observer
00:09:00 Elle Stone’s blog – a lot about color!
00:09:50 sRGB
00:11:40 D65 – the White Point for sRGB
00:11:56 Black Body Radiation and White Points
00:13:44 Bruce Lindbloom has a Color Space viewer
00:14:30 Adobe RGB (1998)
00:15:50 Why not ProPhoto RGB?
00:16:20 Preparing some test shots in the lab
00:16:59 Comparing sRGB and Adobe RGB camera setting
00:18:42 Conclusion – stick to sRGB
00:19:34 Converting between color spaces
00:20:06 Intent: relative colorimetric or perceptual?
00:21:14 Consequences
00:23:10 Winding down
00:24:09 EOF

Meet the GIMP Video Podcast by Rolf Steinort is licensed under a Creative Commons Attribution 3.0 Unported License.
Permissions beyond the scope of this license may be available at http://meetthegimp.org.