Robin2:
Out of curiosity, what are you displaying the images on? Are they just visible on a browser or do you have a screen attached to the RPi?
It is a Banana Pi (not RPI) and runs headless with the GPU disabled (no HDMI output). No point wasting power and CPU cycles on the video display as it will be installed in a data-centre. The board has a TTL UART for direct console access, which is useful when I mess up the SSH config 
If I wanted to embed a display, I would probable use one of these
As it's easy to drive directly from a UART.