Images in Teaching and Learning

In this lesson we will find out how to edit, compress and save images. The local editor available is GIMP; if you have your own notebook, feel free to use any editor you prefer.

GIMP Portable version for download

Image formats and how to use them

The basic skills you should master:

1. Saving an image from the web
2. Compressing, saving in various formats (with different extensions)
3. Cutting
4. Changing brightness, sharpness, hue and other basic features
5. Making a part of the image transparent

TASKS
1. Find a 1MB or bigger image, save it, create a strongly compressed version (an icon). Keep the original version safe!
2. Play with the commands your editor offers. Try to create
- an image which you could use as a background of a web page
- an image which could serve as a symbol, logo etc. you will use in your web
3. Find two images and combine them into one, applying transparency (e.g. Donald Duck walking through Usti nad Labem :) )


TIPS
How to make things transparent in GIMP:
Layers – Transparency – Add alpha channel
Choose the background using the magic wand.
The simplest method is to use Edit → Clear

More information on image formats (in Czech) - HERE
How to make a good photography?

Roman Pihan - a whole web on photography, including tutorials, tips and galleries
Ondřej Neff - practiacal tips for all

Jednoduše na kompozici

GIMP online help (in English)