Watermarking is a branch of information hiding which is used to hide pr oprietary information in digital media like photographs, digital music, or digital video. And also which has seen a lot of research interest recently. The Medical images are also much important in the field of medicine ,all these medical images are need t o be stored for future reference of the patients and their hospital findings hence, the medical image need to undergo the process of compression before storing it. In this paper we present a detailed survey of different existing watermarking algorithms and techniques for medical images. We classify the techniques based on different domains in which data is embedded and to be extrac ted . Here we limit the survey to medical images only.
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