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Wikipedia:Graphics tutorials

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Various Wikipedians have put together graphics tutorials. Some of these are still works in progress. It is preferred to work with open formats (such as PNG or SVG) and free licenses (such as public domain or GFDL) when possible. There are many free software programs available for creating and editing images.

Main page: Wikipedia:Graphs
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Tutorials

Vector graphics tutorials

Application

  • Using Dia - page not maintained - Well suited to technical diagrams & flowsheets - PNG output, limited SVG support
  • Using Microsoft Word - page not maintained - Familiar to many users, easy to use - PNG only, no SVG support

Specific tasks

Bitmap graphics tutorials

Filesize optimisation tutorials

Open source programs

  • PNGCrush - Old tried and true program that reduces PNG sizes using multiple zlib compression trials on disk.
  • OptiPNG - Essentially a newer version of PNGCrush, it economizes the trial (reducing from 100s of short ones to a maximum of 7 longer ones) and does everything in memory. Usually produces identical results, and is much faster.
  • AdvanceCOMP - A group of programs designed to reduce ZIP compression in many contexts, including PNGs (using AdvPNG).
  • Jhead - A program for viewing, altering, or removing Exif data of JPEGs. Amongst other things, this allows for reducing file sizes.

Freeware programs

  • PNGOUT - A program that optimizes PNGs by escewing the usual zlib compression for a slower but more complete algorithm.
    • PNG Gauntlet - GUI for OptiPNG, PNGOUT, and DeflOpt (similar to AdvPNG in AdvanceCOMP)
  • Image Analyzer - Amongst other things, allows for lossy compression of PNG files. Often, however, merely posterizing the image at a level that does not produce color banding results in smaller files of the same or higher quality.
  • JPG Cleaner - Removes Exif data from JPEGs, making the files smaller.
  • JPGExtra and PNGExtra - Programs that losslessly optimize JPEGs and PNGs by cleanly removing all non-image data.

Photo editing tutorials

Combination tutorials

  • Keep in mind that images can contain hidden data and that you might want to remove the hidden data before publishing the images.
  • Text can be overlaid onto images using Template:Annotated image

Software used for Wikipedia images

Vector graphics software

3D software

Raster graphics (bitmap) software

Word processors with vector-graphics facilities

Panorama software

  • Grokking the GIMP: a comprehensive on-line book covering the GIMP, as well as graphic and digital photo editing in general
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