file handling in verilog

I need to know, how to write a constant value in file handling process. In my project, i am doing image processing using vlsi. I got a text file in binary format using image to text. In text file, i am getting "1011" means for the value "1" i am replacing "1100" or value "0" means "0011".

VLSI (real hardware) can't handle files, only a simulator tool can.