matlab - Changing black pixels to be transparent in matlab

Question

First, I'm new to matlab, so thanks in advance for any help.

I have a .png image that I have overlayed onto another image. How can I make only the black pixels on the .png image transparent? I have looked around and no one seems to specifically address this question clearly. I was trying to use either the 'BackgroundColor' function or alphadata.

thanks

Answer 1

使用来自 File Exchange 的EXPORT_FIG提交。

我相信它支持 PNG 文件的背景颜色透明度。