Episode 084

Episode 084 – Make Your Digital Image Stand Out

by heathenx

In this screencast I will demonstrate a technique for de-colorizing an unimportant part of a raster image and emphasizing other areas with color in Inkscape v0.46.

This tutorial is basic and quick…perfect for Inkscape novice.

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13 Responses to “Episode 084”

  1. James G Sack (jim) Says:

    The limited scope ot this screencast makes a perfect vehicle for demonstrating a few quite useful tools/skills. Nice job.
    ~jim

  2. Auf Says:

    Hi heathenx! I’ve been watching your screencasts for months and i was really helped with it.

    But i’ve got some problems with getting your screencast video. Could you make it with *.mov format? Or even *.rm format?

    They are rather small. It would be easier and faster to download

  3. Steven Lawson Says:

    Hi HeathenX,
    Another great screencast, making something that looks really complex actually really simple to do.
    Can I just point out that this technique works great if your source image is a .PNG file but if you use a JPEG it bombs Inkscape (v 0.46) when you call up the Filter Effects panel – this happened to me twice before I converted my source image to a .PNG in GIMP.
    Might be worth mentioning?
    I also found that if your source image has really strong, bright colours, you need to set the saturation way down to something like 0.02 to drain all the colour out of the background.
    Thanks again and keep up the great work – yours and Richard’s screencasts are inspirational.

  4. DoruHush Says:

    Thank you for an other good tip.
    Because you mentioned in the opening, can you point to the source of the person (or site ) that made the application that follow the keys strokes working in Ubuntu Intrepid?
    Thanks again,
    Doru

  5. Martin Says:

    Thanks a lot for your tutorials, they are very useful. Could you make screencast about changing Inkscape appearance ? I mean another colours, fonts etc. like in episode 084. It is very boring for people who has artistic spirit to use still the same, unchangeable program.
    Thanks.

  6. heathenx Says:

    @Auf
    Sorry, but we only have two formats at this time to choose from, AVI and FLV. We would be glad to help you with a conversion script though.

    @Steven Lawson
    Hmm…as you saw from the screencast, I was able to bring in a jpg and work with it just fine without it bombing out on me. Perhaps there is a bug in the software somewhere. I prefer PNG but that is not the best format for digital images. Whatever works, I guess.

    @DoruHush
    https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/324382

    @Martin
    Go to http://screencasters.heathenx.org/microsodes and watch Microsode 010.
    I use Tango icons and my font is controlled by Ubuntu (I use rufscript-ttf for window titles). I now use the Ubuntu Dust theme which is a semi-dark theme.

  7. Zombiebrainz Says:

    Cool screencast — I think filters could prove to be a rich source for screencasts… they can get so complicated but the results can be really amazing.

    On the picture of your kids (cute kids by the way): I would have been tempted to apply a filter on their faces to increase / exaggerate the saturation to make it pop even more. Just my 2 cents.

  8. Don W. Says:

    JPG and PNG both worked in VISTA (Thats amazing in it’s self (Vista working I mean)).

  9. Richard Querin Says:

    Nice job sir!

    Although Filters are the way to go with this (still scared of them though.. 😉 ), you can use the Effects->Raster->Modulate dialog and just make sure the saturation is at 0 when you hit apply.

    Of course like you say if you use Filters you have the advantage of just turning it on and off. With the method I just mentioned, you’re stuck using Undo as your only option. But then again I make a duplicate of just about every object before I do anything to it. I pretty well expect myself to mess up stuff royally at any and every step. 😉

  10. tomh Says:

    in the development build (ie 0.46+SVN) I would probalbly also skip the desaturtate extension and use one of the pre-built filters, eg:
    Filters->Colour->Desaturate
    Quick, simple and all the advantages of being able to turn it off again 😉

  11. tomh Says:

    Oh, and you can also use a color matrix to intensify the colors of the faces, set the diagonal to be something like 1.2. It has the effect of making the colors brighter, although it can saturate to white. It’s a bit like changing the exposure of a 35mm-film photo.

    It’s just a shame that there isn’t a easy to use front-end to the color matrix filter. Another one which would make color effects easy to do would be feComponentTransfer, but it seems to crash inkscape when you use it at the moment (and you have to hand edit the svg…).

    @Zombiebrainz
    I agree that filters can get very confusing extremely quickly, some of the ones that ChrissDesign has setup in the svn version are mind-boggling complicated, although I suspect he would say they are logical. I just tend to stick to one or two elements per filter, and even then thats hard enough to keep track of 😉

  12. Chris Jung Says:

    Hi heathenx,

    I like your screencast very much, I think I watched every show, since I use Inkscape on Linux for designing webpages, so your tuts are very useful sometimes.

    Now I got something on exporting crops for you.

    As you might notice, there is an option to export an selection. I use this for crops like this:

    1. Create a Layer on top of all other layers (more than one is possible, for exporting different crops)
    2. Make rectangle where you want to crop the image
    3. remove fill, use stroke to place
    4. set rectangle to opacity 0
    5. in the export-crop-layer press Ctrl+A to select the rectangle
    6. export selection. make sure the “hide all but selected” is UNchecked.

    you’re done.

  13. Xbody Says:

    Very nice effect. Quiete easy, but cool!