MEDICAL IMAGE WATERMARKING WITH PSNR OPTIMIZATION IN WAVELET DOMAIN BASED ON BAT ALGORITHM by Kishore, P V V, Srivathsav, P Dheeraj, Manikanta, M, Venkatram, N, Reddy, L S S, Goutham, E N D, Devi, D Kimila, Sastry, A S C S

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