Survey of High Secure Digital Image Watermarking using Different Transform Technique
Himalaya Shrivastava; Prof. Sandip Nemade
Telemedicine is well known application where enormous amount of medical data need to be transferred securely over network and manipulate effectively. Security of digital data, especially medical images, becomes important for many reasons such as confidentiality, authentication and integrity. Digital watermarking has emerged as a advanced technology to enhance the security of digital images. The insertion of watermark in medical images can authenticate it and guarantee its integrity. The watermark must be generally hidden does not affect the quality of the medical image. In this paper, we study of digital watermarking based on Discrete Wavelet Transform (DWT) and Discrete Cosine Transform (DCT). This method can be used for authentication and data hiding purposes. The future work can be extended to hybrid DWT and single value decomposition (SVD) method to improve the robustness of the watermark.