A novel multiple objective optimized color watermarking scheme based on LWT-SVD domain using nature based Bat Algorithm and Firefly algorithm

摘要

For the remote access of the medical image it should be watermarked with the patient information to ascertain the medical image. The purpose of the this paper is to optimize multiple objectives using bat Algorithm and firefly algorithm in Lifting Wavelet Transform and Singular value Decomposition domain. Here the multiple objectives are the perceptual quality, security and robustness. Fibonacci-Lucas Transform is implemented for secured color watermarking technique. The technique is tested with color USG Scan cover image of size 1024 × 768 and gray scale patient image of size 256 × 256. Here in YCbCr color space the Y component of color USG scan host image is used for embedding the gray scale watermark image. In term of PSNR the perceptual quality is achieved 88.6196 dB using Bat algorithm and 88.5767 dB using Firefly algorithm. This technique shows the near about exact recovery of watermark image by getting NC 0.9946 through Bat algorithm and 0.9945 through Firefly algorithm.