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How do I make background transparent?

Posted: 2008-02-17T11:15:33-07:00
by c5c5
Greetings,

I have a gif image that I would like to make the white bg transparent. How do I do this in Image Majick?

Thanks!

Re: How do I make background transparent?

Posted: 2008-02-17T19:32:57-07:00
by fmw42
convert input.gif -transparent white output.gif

assuming the background is pure 100% white

Re: How do I make background transparent?

Posted: 2008-02-23T21:32:08-07:00
by c5c5
Thank you. I will see if it works.

Re: How do I make background transparent?

Posted: 2008-02-28T18:34:51-07:00
by anthony
For more difficult background to transparency conversions..
Transparency Masking an Image
http://imagemagick.org/Usage/channels/#mask_creation

Re: How do I make background transparent?

Posted: 2010-09-17T07:50:06-07:00
by Oleg
fmw42 wrote:convert input.gif -transparent white output.gif

assuming the background is pure 100% white
I have this error when running this command :

Image

What is the matter?

May be I have installed a wrong version of ImageMagick ? :?

Re: How do I make background transparent?

Posted: 2010-09-17T07:57:08-07:00
by Bonzo
Can not read Russian but assume that the problem is that the convert.exe that is being used is the one built into Windows not IM the convert.exe

I think the work around is to rename the IM convert.exe to somethng like IM_convert.exe and use IM_convert instead of convert in your camand. I wonder if you could add the path to the IM convert comand e.g. c:/program files/imagemagick folder/convert

Re: How do I make background transparent?

Posted: 2010-09-20T00:29:28-07:00
by Oleg
Bonzo wrote:Can not read Russian
I can translate (from Russian) texts into my error window (above) :

Window title : "Application error".

Text after red cross : "Application initialization error (0xc0150002). Press OK to close application".
Bonzo wrote:but assume that the problem is that the convert.exe that is being used is the one built into Windows not IM the convert.exe
No, it is not.

I run my command (convert.exe with parameters) from "Far manager" (a file manager like Norton commander) in curent folder C:\ImageMagick>