Commonly, a specific algorithm is dedicated
for image steganography and one else for watermarking.
This publication is a presentation of one method which
can manage both. Watermark or secret image is binary
image as default and the medium can be an image color or
gray level with size greater than the first one. Singular
Value Decomposition (SVD) and Discrete wavelet
transform (DWT) are the mathematic approach used.
They are popular on these domains but the way to operate
is different for each algorithm. An insertion of new two
parameters is the particularity of our method, in which
we decide if we process with steganography or
watermarking. Note that we are talking here about
Keywords : Steganography; Visible Watermarking; Discret Wavelet Transform; Singular Value Decomposition.