Advanced Watermarking of Digital Images Showing Robust, Semi Fragile and Fragile Behaviour 
Shivanand Pujar1, Kangana W.M2, Chitrashree Kurthkoti3, Abhinandan P. Mangaokar4, Jagadish S. Jakati5
1Dr. Shivanand Pujar*, Assistant Professor, Department of Computer Science and Engineering, S. G. Balekundri Institute of Technology, Belagavi (Karnataka), India.
2Ms. Kangana W.M, Assistant Professor, Department of Computer Science and Engineering, S. G. Balekundri Institute of Technology, Belagavi (Karnataka), India.
3Ms. Chitrashree Kurtkoti, Assistant Professor, Department of Computer Science and Engineering, S. G. Balekundri Institute of Technology, Belagavi (Karnataka), India.
4Abhinandan P. Mangaonkar, Assistant Professor, Department of Computer Science and Engineering, S. G. Balekundri Institute of Technology, Belagavi (Karnataka), India.
5Mr. Jagadish S. Jakati, Assistant Professor, Department of Electronics and Communication Engineering, SGBIT, Belagavi, (Karnataka), India.
Manuscript received on November 16, 2021. | Revised Manuscript received on November 22, 2021. | Manuscript published on November 30, 2021. | PP: 196-212 | Volume-10 Issue-4, November 2021. | Retrieval Number: 100.1/ijrte.D66121110421 | DOI: 10.35940/ijrte.D6612.1110421
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Digital Image Watermarking plays an important role when it comes to maintaining digital color picture authentication information. The proposed paper consists mainly of a digital watermarking scheme consisting of discrete wavelet transformation and involving the generation of pn sequence number to embed the watermark and also to extract the watermark from the host image. The technique suggested includes both embedding the watermark and removing it from the host file. Both the method of embedding and extraction consists of generating the pn sequence number values using the random numbers. The technique for all three of the RGB signal sources is included. The watermark symbol is located independently within the RGB image’s red, green, and blue channels. The suggested technique further reveals the improved mode of digital watermarking of images through fragile watermarking of images and semi-fragile digital watermarking of images.
Keywords: Digital Watermarking, Discrete Wavelet Transformation (DWT), pn_sequence (pseudo-noise sequence), PSNR(Peak Signal to Noise Ratio), Fragile Digital Image watermarking, NCC(Normalized Cross-Correlation).