How to create a semi transparent shape??

I would like to know how to draw semi-transparent shapes in OpenCV, similar to those in the image below (from http:/...

Apply gradient mask on image that already has transparency with ImageMagick??

I've got a PNG image with transparency: original.png Now I want to use ImageMagick to apply a diagonal gradient t...

How to create transparent activity in android??

How to create transparent activity in android in that screen tap to dismiss button automatically dismiss the activi...

initialise an MFC Cimage to a solid colour?

I don't use c++ or MFC/ATL etc so assume I know nothing. The whole picture is that I need to take accept a PNG with...

How do i add transparency in my unity3d shader??

I have a shader for bending a tunnel into a curvy path. But when i'm inside that tunnel, i want the walls of the tun...

Transparent equivalent of given color?

I've had this a few times, so here goes: I'm making some plots which hold curves with estimates of a parameter given...