Development of efficient Quality Preserving Invisible Watermarking Technique to embed both Images and Data in an Image

Digital watermarking is used for protecting the copyright of images in internet. Conventionally the quality of the original image is compromised when another image or data is embedded in the original image. In this paper, an efficient watermarking technique is proposed to embed both a signature image and data on the original image. Performance is evaluated in terms of Peak Signal to Noise Ratio (PSNR) and Root Mean Square Error (RMSE). Images with fine details have higher PSNR and lesser RMSE when compared to images with less information. Also a successful attempt has been made to hide a set of three signature images on the original images of large size.