Storing text or letters within an image
I saw this a while back on TechTV and I forgot how they did it. How/What would be the best way to encode/decode text that is hidden within an image file?
I will assume you are referring to steganography. If you google that term you should find a large amount of information. I have not delved into the subject enough to recommend a program that will do exactly as you say, but have seen some that are similar. There is a program called JPHideandSeek which is popular to hide images within one another. Good look on your research.
Try a program called Camouflage.
This program uses the "right click" method as opposed to a sequence of keys to pull up a hidden panel.
Just as when you right click on a file you would see "extract here" "open with" etc. in a large number of stego programs you will see "camo" or some similiar term.
You can find plenty of programs to hide text in images, or even in music files, etc…..
but the measure problem is how do u detect whether this image has any test hiden in it or not, if somehow u detect it, how can u decode it …….
If you're new to steganography there are two presentations here you may find useful;
Dr. Johnson is an authority on steg, and I would recommend researching his work on this topic.