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→Converting Between Types
Converting from JPEG to one of the other formats is lossless, but re-encoding it as a JPEG is lossy, so converting it back to JPEG will result in a different image than the original.
=== Bitmap to/from Vector ===
Converting a bitmap image to a vector is impossible or at least very difficult. You can have a look at this website for some information about [http://www.computerlifesavers.com/netsnippets/Art%20and%20Design/Auto-Tracing%20How%20To%20Convert.htm autotracing and other bitmap/vector facts].
== Scanning and OCR ==
