In this paper, a novel image watermarking method is proposed which is based on discrete
wave transformation (DWT), Hessenberg decomposition (HD), and singular value …

Image watermarking technique is one of effective solutions to protect copyright, and it is
applied to a variety of information security application domains. It needs to meet four …

Background In digital mammography, finding accurate breast profile segmentation of
women's mammogram is considered a challenging task. The existence of the pectoral …

Digital watermarking embeds a watermark to minimise the problem of illegal copying and
disseminating multimedia contents. However, the existing techniques do not maintain the …

Extraction of the breast border and simultaneously exclusion of pectoral muscle are principal
steps for diagnosing of breast cancer based on mammogram data. The objective of propose …

In this paper, a new four-dimensional hyperchaotic system that has better unpredictability,
more complex dynamic behavior, and a larger key space is proposed. The initial chaos …

Firefly algorithm (FA) is one of the newly developed nature inspired optimisation algorithm,
inspired by the flashing behaviour of fireflies that a firefly tends to be attracted towards other …

Currently we are facing a wide interest in multimedia security and copyright protection due to
the explosion of data exchange in the Internet and the extensive use of digital media. In this …

The protection and authentication of multimedia contents and copyright have become a
great concern in the fast-growing Internet environment. This paper presents an optimized …

A new embedded chaotic cryptosystem is introduced herein with the aim to encrypt digital
images and performing speech recognition as an external access key. The proposed …