Not implemented due to memory restrictions on the arduino

Hello,
I am working with Gt-521F32,every thing is working fine.I cane able to implement all the functions and i can able to make and run code for Delete also.
But here my question is in Gt-521F32 libraries some functions are not implemented due memory restriction on the arduino.
If i need to use those functions like
1)GetImage
2)GetRawImage
and more functions which are already defined but there is no expansion of above functions in .CPP file library with below message.
"Not implemented due to memory restrictions on the arduino."
How can i use them can any one tell me?

SivaBharani:
Hello,
I am working with Gt-521F32,every thing is working fine.I cane able to implement all the functions and i can able to make and run code for Delete also.
But here my question is in Gt-521F32 libraries some functions are not implemented due memory restriction on the arduino.
If i need to use those functions like
1)GetImage
2)GetRawImage
and more functions which are already defined but there is no expansion of above functions in .CPP file library with below message.
"Not implemented due to memory restrictions on the arduino."
How can i use them can any one tell me?

The functions are in the code, but even if you uncommented them, they do nothing as they are empty functions. You would need to write these functions yourself.