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Ah ok. I will give that a shot. Thank you very much for your help, you've been great!

Ah I see. I didn't know that. So I am guessing I need to find a way to cycle through red, green and blue pixel bytes and change only them?

Yes it just changes the bytes, the format was suppose to stay the same as PNG. Would it have to change these other contents to save successfully?

first the algorithm checks to if the image bytes are large enough to accomodate the text bytes. For 1 text byte to be encoded, 8 image bytes are needed (1 bit encoded per image byte).

For (i=0;...

Sorry forgot to answer your question above. Yes, I have tried comparing the original and modified bytes of the image file and the algorithm does as intended and alters the least significant bit.

Hi, thanks for your reply.

When I say a blank file, I mean it saves a file, but when opened it is just completely black.

I have tried tidying up the code to make it a bit clearer and have...

I was wondering if anyone had any ideas what is going wrong with my LSB steganography application. The problem is that I cannot get a modified image file (with secret text hidden in the LSBs) to...