An Efficient Digital Watermarking Technique in Two-Dimensional Image Using DWT Algorithm

Abstract

Discrete Wavelet Transform is the algorithm which can be used to increase the contrast of an image for better visual quality of an image. Histogram value for original image with two highest bins are taken for the process of embedding the data to perform histogram equalization. Watermarking become a major area of research in image processing to face the challenges initialized from the growth of dispersal of digital content over the network. To avoid the misuse of the data in the internet, watermarking plays a major role in prevention of the data by encrypting the data. The watermarked message maybe logo, label, etc. which can be embedded into the digital data used with various applications like protection of copyright, authentication and so on. The watermarking can be applied with two- dimensional image, three-dimensional image and also in video for protecting the data to secure the data. Watermarking can do with several image processing algorithms like DWT, DCT, etc. Here, the proposed research work implements the DWT algorithm for digital watermarking using MATLAB for encryption and decryption process for the process of authentication