Hello everyone and good day!!!
I'm trying to embedd an image watermark to another image for copyright protection and I plan to use DCT and embedding the watermark in the middle band coefficeint of the host image. The problem is I don't know which of the formulas to use since there are a lot of them when I google DCT. I get confuse on which is which?
Base from what I read so far
1. the image is divided into 8x8 sub-blocks
2. then DCT is applied to each of the sub-blocks. I'm stuck here what happens next?
I'm using OpenCV and c++ to implement this.
Can anyone help me with my problem?