What are some common open (royalty-free) image formats?

Which common image formats are open or royalty-free?

Answer

A few of the more well known ones are:

PNG, DNG, BMP, GIF (Patents are expired),

Some in question are: JPEG (Lawsuits pending), TIFF (Until next year),

Some requiring licensing are: JPEG 2000,

Attribution
Source : Link , Question Author : michelemarcon , Answer Author : PearsonArtPhoto

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