[BangPypers] combine R,G,B channel

[karthick perumal]

hi i am doing project named visual cryptography,in this project i have a
module to combine R,G,B channel together,so i have a three image file
 called red.png,green.png,blue.png,so how to combine those file to get the
final color image,please suggest me some python code or other open source
tools to implement this module,