It's a valid suggestion, but I think there are a two issues. First, would
this just convert completely white pixels to transparent? If so, I think
it would suffer the same problem as the other methods: The slightly gray
background pixels at the edges of the text created by anti-aliasing
remains completely opaque and shows up as white flecks around the text.
The second issue is that I need to do this to a bunch of images, so the
preference would be to have some command line (or scriptable) approach. I
don't know if you can (easily) do that with the Gimp.
Thanks for the suggestion,
Nick
On Fri, 2 Jun 2006, Ben Stern wrote:
On Fri, Jun 02, 2006 at 02:45:44PM -0400, Nick Cummings wrote:
I'm trying to make some images of equations I have written in LaTeX. I
want the equations to be clack text on a transparent background. What
I'm currently trying to do is use the ImageMagick command "convert" to
take an image of black text on a white background, and then set the
transparency equal to the brightness on a gray scale (i.e. white is
totally transparent and black is totally opaque). convert appears to be
quite powerful, and I think this is possible, but I don't quite understand
how. Afer reading the man page for ImageMagick, I tried the command
It's a bit of a sledgehammer, but you can use the GIMP to do this - open the
image, right-click on it, Layer -> Transparency -> Color to Alpha and choose
white as the color to convert to the alpha channel.
[You might have to add an alpha channel first - I don't remember.]
Ben
--
Ben Stern UNIX & Networks Monkey [EMAIL PROTECTED]
This post does not represent FTI, even if I claim it does. Neener neener.
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