load many image, then output "QImage: out of memory,return a null image"

hi

I'm trying to use QImage load many image

but I found a problem,

when my program use more than 1.4GB memory, then I could not continue loading image,

It will output " QImage: out of memory,return a null image "

but, I'm pretty sure I have enough memory not use

does anyone know where is the problem?

thank you very much

What OS ? Perhaps there is some limitation to the amount of memory for a process or user?

I'm use Win7 64bit,

if Indeed have limitation to the amount of memory, can I increase the amount of memory in Qt Creator?

thank you very much