convert(Image, img) where img is your ImageCmap
--Tim On Tuesday, June 24, 2014 05:13:20 AM Yakir Gagnon wrote: > Great! I didn't know it was that simple, but if I have an indexed image I > created with ImageCmap, how would I first convert it to a direct image so > that I'll be able to concatenate the alpha layer? > > On Tuesday, June 24, 2014 9:30:00 PM UTC+10, Tim Holy wrote: > > 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!
