If your image has transparency, then imwrite(I, "name.png") should Just Work.
There are many ways to get an image with transparency: for example, you might
load one from disk. If you want to construct one "from scratch," here's a
demo:
A = rand(100, 128, 4); # random colors
A[:,:,1] = linspace(0,1,100) .* ones(1,128); # alpha gradient
img = colorim(A, "ARGB")
This builds an ARGB image. You could alternatively choose an RGBA image if you
prefer (for which A is the 4th channel).
--Tim
On Monday, June 23, 2014 10:00:44 PM Yakir Gagnon wrote:
> How, if possible, can I imwrite a PNG image that has transparency in it?
> I'm assuming something like:
>
> using Images
> imwrite( I,"name.png",alpha=A)
>
> Thanks!
