Episode 124: PS Translation Service

Adobe(R) Photoshop(R) Screenshot(R) Download the Video! (53.7 MB, 28:14)
Download the Video for iPods etc (24.1 MB, 28:14)

There are a lot of tutorials out there for “The Other Program”, also called Adobe(R) Photoshop(R). (I hope I got the Rs right, can’t find the page where Adobe(R) told the world how to call this program.) A lot of that stuff is easily translated to GIMP, but there are some serious differences. One are the “Adjustment(R) Layers(R)”. This is a way of applying a curve, gradient, hue or saturation change…..  without changing the real image. You can come back later and tweak the curve or the slider – non destructive editing.

There is an easy way to work around this: make a new layer of the visible image and work on that. You have to redo that, if you decide to change something in the lower layers.

To show how to do this I have ripped out a part of John Arnold’s Photowalkthrough podcast and redone the same in GIMP. Photowalktrough is a really good resource for everybody who is into the digital darkroom – independent from the program used. And John has his #100 out! Congratulations!

GIMP will have non destructive editing in a year or two – it’s the main reason for getting GEGL into GIMP and making this big effort of writing a lot of the program again.

In the second part of the show I get the blackboard out and start a new segment in the show. I try to explain how  film and sensors are working. I’ll expose you to some of these lessons for about 5 to 190 minutes and will then decide upon your reaction if I should keep this on. I’ll have them at the end of the show – if you are bored you can just skip the rest.

Sorry, there is no TOC up to now. the moment Kevin made one. :-)

The TOC

00:28 Welcome to PhotoWalkThrough.com from John Arnold
01:05 Welcome to Meet The Gimp from Rolf
02:30 Back to John
02:50 – a curves layer
05:10 – a layer mask
08:20 Back to Rolf
09:00 The original photo
09:20 Make a layer with increased saturation
10:40 Add a gradient layer in soft light mode to alter the sky
12:10 New layer from visible
13:25 Add a layer mask and edit it
15:25 The problem with destructive editing
15:55 But it’s not that big a problem
18:20 New segment – time for lessons
19:55 How film works
24:00 How a sensor works
27:00 Feedback please
28:14 The End

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

17 thoughts on “Episode 124: PS Translation Service

  1. Thanks for the show which has helped me in my understanding of how to convert Photoshop to GIMP. The short lesson at the end is a great idea and promises to be interesting in the future.

  2. Hi Rolf

    Yes, I like it. Please keep up your “photographical technologies basics” class as I feel that understanding these things will help me getting better results from my equipment. Or, at least, understand why I did not get the results expected …

    Thanks four all the work you put in your shows.

    Stefan

  3. Hi Rolf
    I am looking forward to enjoying more Gimp tutorials and photography tech basics.
    Thanks for sharing your skills.
    Terry

  4. It’s amazing how your production values get better and better. I really liked the ‘home-made’ feel of some
    of the earlier podcasts, but I’m not at all offended by the very professional feel of this one. Vielen Dank!

    And thank you for this great episode, I know it will be useful and I am sure to refer to it often. I was
    unaware of PhotoWalkThrough but I am glad to have been introduced to the very capable instruction
    there. A nice find. The particular item you cover in this episode was a roadblock to me for about six
    months, and that was just to work out the basic version! I am very glad to see a better version here.

    I like the tech talk at the end; I can see myself watching podcasts I wouldn’t watch otherwise for these
    great nuggets alone. It is really good how you have abstracted away all of the not very useful stuff, and it
    was just the right length. Grain is something that always confuses me – I feel more grain should be better
    (after all, there are tons of scripts to add it) but it never used to be a good thing when it was visible. But
    of course if the grain is fine enough, it becomes invisible. All very counter-intuitive. Anyhow, knowledge
    of grain is more relevant than ever due to modern technology such as video cards. It is impossible to
    evaluate things such as Anti-Aliasing (AA) and Anisotrophic Filtering (AF) without an appreciation of
    grain. And of course unwanted grain (in the form of Noise) is as relevant as ever.

  5. It’s always a delight to learn with good teacher, and the success of your shows tells us that folk here know a good teacher when they see one – so thanks for all your great work! I really appreciated your ‘side-by-side’ exposition of how to use something like Photoshop’s ‘adjustment layers’ process in GIMP. The most useful bit for me was learning yet more of the clever stuff you do with layers – copying the visible layer; using the curves tool ‘history’, etc.

    Because learners don’t know what they don’t know, we can only really learn by watching an expert at work. So I – like so many others here – find sitting with you (virtually!) while you edit a photograph always really useful. For myself, I’d be very happy to see more of the sort of thing you did in the first section of this show. (I don’t just mean demonstrating how to do in GIMP what John does in Photoshop – though that’s very useful to see – but demonstrations of more ‘advanced’ techniques in post-processing.)

    And do please include more short discussions of fundamentals. Your clear presentations of these quite complex topics are really helpful. As you say, what’s important is to have a useful mental picture of what’s involved, not necessarily a complete understanding of the physics or chemistry. What many of us need is Rolf Steinort’s introductions to and summaries of the sort of stuff Sean McHugh covers in technical detail at http://www.cambridgeincolour.com!

    Thanks for another great show.

  6. Pingback: Links 25/10/2009: GNOME 2.28 Reviewed, PCLinuxOS Turns 6 | Boycott Novell

  7. Isn’t the comment above this basically spam?

    Anyone fancy a TOC?

    http://meetthegimp.org/episode-124-ps-translation-service/
    Episode 124: PS Translation Service
    00:28 Welcome to PhotoWalkThrough.com from John Arnold
    01:05 Welcome to Meet The Gimp from Rolf
    02:30 Back to John
    02:50 – a curves layer
    05:10 – a layer mask
    08:20 Back to Rolf
    09:00 The original photo
    09:20 Make a layer with increased saturation
    10:40 Add a gradient layer in soft light mode to alter the sky
    12:10 New layer from visible
    13:25 Add a layer mask and edit it
    15:25 The problem with destructive editing
    15:55 But it’s not that big a problem
    18:20 New segment – time for lessons
    19:55 How film works
    24:00 How a sensor works
    27:00 Feedback please
    28:14 The End

  8. Kevin, thank you for the TOC!

    The ping back is near the borderline to SPAM, but I think it has some value. I don’t really know what to think of Novell and M$, is this hysteria or valid warning?

  9. Good episode, this surely bridged a gap from PS to GIMP.

    The New Segment is good and needed. For any newcomers as well as veterans, there will always be some detail one have forgotten in snapping shots and postprocessing them. So going back to some basic can help understanding certain unsuspecting problems. At the same time these future basic explanations will be a common reference point. I for one haven’t gone this far into analogue contra digital, though I have read a bit about it.
    As mac wrote I have also been on Sean McHugh page and found a lot of information there. This is something to keep in mind to future segments when or if you run out of topics.

  10. Rolf,
    You were born to be a teacher and your episodes are getting better and better. I love the tech basics section. I must tell you that whenever I work with GIMP I hear you talking to me in my ear. This is getting scary :)

  11. Hello Rolf,

    Everything I know about GIMP I have learned from you. So first off thanks. Bandwidth is a precious thing to me here in Paraguay and sometimes I have to wait hours to download an episode of GIMP. It’s worth it. But my interests lay only in digital post-production, so my preference would be to see the photographic podcasts in another show. Maybe “Camera Man Meets the Gimp”.

    The info on photography is very interesting, but for me it is a waist of band width.

    No matter, I will still be downloading MTG.

    Thanks

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Anything to add from your side of the computer?