CImg is C/C++ library for work with images. 
This example shows how compile and work with this library on android. 
CImg can use some external library. In example, we add libjpg and libpng.

If you want build last versions libpng and libjpg you shoud see :
http://stackoverflow.com/questions/12260149/libjpeg-turbo-for-android
https://github.com/julienr/libpng-android

Build example: 
  cd {$Project-dir}
  android update project -p .
  ndk-build
  ant debug

P.S
CImg: 
  http://cimg.sourceforge.net/

CImg reference documentation: 
  http://cimg.sourceforge.net/CImg_reference.pdf