Re: Transparent background with PNG
- To: mathgroup at smc.vnet.net
- Subject: [mg96930] Re: Transparent background with PNG
- From: igorantonio at gmail.com
- Date: Fri, 27 Feb 2009 06:15:19 -0500 (EST)
- References: <gnm1o0$hgg$1@smc.vnet.net>
Hi, Try gr = Rasterize[expr, Background->None] (documented) Export["file.png", gr] Your expr needs to be something that can rasterized, such as a Graphics expression. Rasterizing something that's already a raster (Graphics[Raster[...]]) or Image expression is not going to work. An undocumented shortcut: Export["file.png", expr, Background->None] will do the same thing. Igor On Feb 20, 4:47 am, replicator... at gmail.com wrote: > Hi, > > how can I save an image toPNGformat (eg. a simple plot), with the > (white) background being transparent? I understand thatPNGexport > supports alpha channel, but have no clue how to instruct Mathematica > to exploit it. > > Thanks in advance > > Istvan Zachar