Recently develpoing of the internet technology and spreading of the variable digital media are caused the problems. They are to protect the copy and to preserve the copyright. It is that the resolution is digital watermark. This paper is research abou...
Recently develpoing of the internet technology and spreading of the variable digital media are caused the problems. They are to protect the copy and to preserve the copyright. It is that the resolution is digital watermark. This paper is research about digital watermark that is to strengthend by PN encoding after Wavelet transform.