Meet the GIMP

by Rolf Steinort (info@meetthegimp.org) · · · CC BY-SA 2.0 · 153 subscribers

The GIMP is a image manipulation program. It is free (as in speech and in beer), it is open source and it runs on Linux (and other Unixes), Windows and MacOS. It can do nearly all the stuff you can do with Adobe® Photoshop® and more than a lot of other programs. I'll show you in this screencast how to use it for postprocessing digital camera images. There will be a new episode each thursday (european) night.

95 Episode 095: Shrinking! (1) March 31, 2009
Again I steal an idea from the forum. It’s making fake tilt shift images. They look like images of model railway landscapes but are made from reality. Have a look at the forum for links to images by Bert and others. I do half of the work in this podcast …
94 Episode 094: Wine and Curves March 24, 2009
It’s curves time again. This powerful tool is in the centre of the stage and I try to explain it’s nearly unlimited power over colours, contrasts and brightness. Worth to learn. This week I visit a vineyard in Missouri (too bad – only via HTTP) and discuss the dangers of …
93 Episode 093: Isolation! March 18, 2009
In this episode I try to isolate a subject from the background. There are a lot of ways to do this – I chose to make a layer mask with the threshold tool. Selecting with the path tool is an other option – see the comments to this post. To …
Note: Use “right click” and “Save as” to download the image file. Somehow Podpress doesn’t get it…. It’s Philippe’s turn again. Today he starts with an image of his son David and turns it into a poster like the ones made by Shephard Fairey. We had a show about this …
91 Episode 091: Growing Feathers March 10, 2009
There was a question in the forum about how to desaturate and blur the surroundings of a figure. The blur and desaturation should follow the shape of the figure. I give an answer here – making a selection, storing it in a channel and then grow and feather it according …
[display_podcast] I want to sell some stuff on eBay and of course I know that it will sell better with a good image. So I set up my “Production Shot Home Studio”, consisting out of a special height adjustable table, a light tent, reflector and flash. EDIT: See the comments …
89 Episode 089: Transparency Feb. 24, 2009
[display_podcast] Today I talk about the Eraser Tool, Alpha Channels and Layer Masks – in short: about transparency. Jim got me onto this topic with an email. Jim, consider this the answer. Norman sent me another mail about F-Spot and using RAW and XCF files. Up to the inclusion of …
[display_podcast] After reading all your comments to this post and tracing back the origin of the mail I found out that this upcoming device is not from China but Chile. It’s only two letters difference…. OK, it’s a fake – but you should have seen this at one glance. Which …
[display_podcast] This is the second show about F-Spot – one week late because of sound problems. Edit: I have said something wrong in the video: The hotkey for opening the tag entry is “t”, not “Ctrl-t”. “Enter” validates the input and “Esc” closes the entry field. It’s about editing images …
[display_podcast] Today I explore the program F-Spot. It’s an image multi-tool – you can rate, tag and index your images, store or export them and even do some editing with it. You find the F-Spot homepage at f-spot.org. F-Spot is a program for Linux and the Gnome desktop environment. But …
This week it’s geek time. I found in the German c’t magazine an image which can measure the amount of change to contrast caused by an image manipulation. Yes, an image can measure. I contacted the author, Ralph Altmann, and we cooperated in translating this file from Photoshop to GIMP. …
This week I start with a short introduction into autostereoscopic images, see two posts below. Then I cover the GEGL operation “c2g”, which converts acouloured image into a monochrome image with a lot of noise or other other effects. It’s a “try out” thing – up to now I have …
A lot of people miss “film grain” in digital images. I show how to add it (the exmple on the left is a bit over the top…). You can extract the grain from a scanned analog image or make your own digital grain with the HSV noise filter. I found …
I am back with a short trip into the land of the non-square pixels. You can change the resolution and aspect ratio not only of the image but also of the individual pixels. And then I have a reminder about animated GIFs – a “commercial” from SCALE 7x. SCALE 7x, …
81 Episode 081: Winter! Dec. 24, 2008
This show has a new encoding, so it may not be playable on every device. I wanted to test this thoroughly before rolling it out, but the old converter program has some problems. If you run into problems – it should be playable on any computer with the program VLC. …
This show is two days late – lots of work and again some eye trouble. This time the other one – but it is working out. Bert (Ray Adagio on the Forum) is the star of this episode. He has written some great scripts and enhanced others, the Zone Adjustment …
This is just a short show to catch up on my missed show on Tuesday. I’ll look a tiny bit behind the math in the convolution matrix with a spreadsheet model of a single row of pixels. And I’ll show you an often overlooked feature of GIMP – the screenshot. …
Philippe lives in Chile – and that is on the southern hemisphere. Summer, flowers, the beach…. (In Bremen it’s winter, rain and wind.) So he sends us northerners, who are shivering in the cold, a floral greeting. Of course made from scratch after a visual visit in the garden. This …
Today we are going into Math-Land, but not too deep – I promise. But first there is a visit to the Oakland Technology Exchange West – a non profit that gives new life to (not so) old hardware. The Convolution Matrix lives in Math-Land. It is the backbone of a …
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 …