is it compulsory that we can use dct during image compression? can i use dct just for hiding some data in it and again inverse dct on that and get the steg imaage similar to original image?

where dct is used?

Answer 1

[Walter Roberson]

There are many different ways of doing image compression, and there are many different things that you can use dct for, including hiding data.

[sonam chhikara]

ok thanku