Image compression is typically performed through an image/data compression algorithm or codec. Typically such codecs/algorithms apply different techniques to reduce the image size, such as by:

• Specifying all similarly colored pixels by the color name, code and the number of pixels. This way one pixel can correspond to hundreds or thousands of pixels.
• The image is created and represented using mathematical wavelets.
• Splitting the image into several parts, each identifiable using a fractal.

Some of the common image compression techniques are:

• Fractal
• Wavelets
• Chroma sub sampling
• Transform coding
• Run-length encoding