Fast and efficient image watermarking algorithm using discrete tchebichef transform

Abstract

Discrete Tchebichef Transform (DTT) is a transformation that has been widely applied in image processing, but still not widely applied in image watermarking. Based on the previous research results, DTT has advantages to reduce computational complexity, so that computation can be done faster and efficiently than the Discrete Cosine Transform (DCT). DTT also have similar properties with DCT, such as separability, symmetry, and orthogonality. DTT has also been shown to have higher energy compactness than the DCT, thus making DTT potential to be implemented in the image watermarking algorithm. In this paper, DTT will be introduced and applied in the techniques of image watermarking. Based on the results of this research, there is a very significant difference in the time required for computation, where DTT is proven to be very efficient to reduce algorithm complexity so that the time spent embedding and extracting copyright is about five times faster than DCT. Nevertheless, the watermarked image quality is also well preserved, as is the robust to various attacks