I’ve been playing with Inkscape, a free open-source image processing tool. For a project I need to draw some cartoonish images and clean them up and I’m learning how to do that thanks to YouTube and Inkscape’s own tutorials.
Note: If you’re using Inkscape on a Mac you may also need to download XQuartz; note that you use the Ctrl key not the Command key in Inkscape. Similar software is Gimp (free) and Adobe Photoshop (not free). I’m also teaching myself to use Scribus, a layout tool, but I mostly use PowerPoint for that at the moment.
Here’s a drawing of a house (biro on white paper) photographed by my iPhone and emailed to myself. Scanning it in would give a much better starting image to work with and drawing it more neatly etc etc but I’m just playing for now.
Imported into Inkscape by File > Import and OK-ing whatever suggestion it gives
Once imported ensure it’s selected (click on it if not) and that the arrows are double-headed, then choose Path > Trace Bitmap
Fiddling about with the settings … (use Update to see how it’s going before using OK to apply)…
…produces a layer which can be moved away from the main image, resulting in a separate clean black and white image.
The resulting image…
Further tweaking can be done by using the node tool (looks a bit like an archer’s bow between the pointer icon and wave (?) icon in the panel on the left below) and moving the lines about but I’ve not bothered with that for now.
OK I had a bit of a play around with it. Stretched the E. (Eeeeee !)
Things I’ve learned after a few hours’ play
I have not been saving images as .svg files (which is, I think, what I am supposed to do) and am. just cheating, copying a screenshot and pasting into my .pptx presentation. I’ve noticed that enlarging the image once in the PowerPoint neans that it looks a bit grainy so I recommend enlarging it in Inkscape by zooming in, taking a screenshot of that and then it will look better.
I’ve also had some fun with the ‘bucket’ tool which fills an area with colour. Also the resizing tool (hold the Ctrl key [Mac users you too, not Command] to enlarge or shrink while keeping the same aspect ratio.