Image Water Marking using DWT to Encapsulate Data in Medical Image

At present various watermarking techniques are in use in the field of digital images. The medical image watermarking creates a greater degree of the distortion as a result of the embedded image, which is a big challenge in the medical applications as it affects the decision making process. Certain watermarking technique results vary with different images and also the performance seems to be inconsistent when various images are considered for watermarking. The key point of this work is to enhance the quality and security in order to accomplish distortion free watermarking by utilizing a watermarking technique which subject to pixel weight. For this 2 level DWT is used to obtain the best region for embedding for which the dragonfly optimization algorithm is applied.