SIXEL is a bitmap graphics format developed by DEC (Digital Equipment Corporation) to use on printers and terminals. Such image consists of six pixels high and one pixel wide represented as an escaped sequence. If you want to open a SIXEL file but do not have a DEC terminal, the only way is to convert it to another more common format.

This is a vector image created in the Adobe Illustrator program. It consists of lines that connect points; it’s used in SMI and during the creation of logotypes. They can be increased without lose of quality since they don’t contain raster image data. AI consists of a header, identifier strings and graphics objects. It functions to present graphical images in EPS format.