Problem Filereference.load()

Good  afternoon, I'm doing an application that will display multiple images  on screen, I use the image, make a thumb and drop the picture, the  problem is that if I upload 10 pictures of 15Mb, 150Mb it loads in my  memory and I can not release memory, I am sending a link with an example and the source enabled UPnP, if anyone can help me be grateful.

http://www.joaozonta.com.br/tentativa02/

Ps. Sorry my poor english