We treat the quaternionic Fourier transform (QFT) applied to quaternion fields and
investigate QFT properties useful for applications. Different forms of the QFT lead us to …

As the largest organ in the human body, the skin provides the important sensory channel for
humans to receive external stimulations based on touch. By the information perceived …

The design, fabrication, and characterization of a new type of tactile display for people with
blindness or low vision is reported. Each tactile element comprises a piezoelectric …

Image Steganography is the method of concealing secret information into the digital image,
and LSB replacement policy is recognized as the foremost and widely used approach. In …

Digital watermarking is an efficient and promising mechanism for protecting the copyright of
the transmitted multimedia information. Thus, this paper presents two robust hybrid color …

The development of the internet offers the ability to transmit large amounts of data quite
conveniently via networks. However, sensitive data in transmission can easily be intercepted …

As for the fractional transforms, to date only fractional Fourier transform (FrFT) has been
applicable to color images in a holistic manner by using the quaternion algebra, yet, discrete …

The image acquisition device, the light is filtered through a Color Filter Array (CFA), where
each pixel captures only one color (from Red, Green, and Blue), while others are calibrated …

The paper presents a novel QR code based color image steganography to facilitate remote
transmission of ECG signal along with patient diagnosis data. The proposed system is …

Many effective methods of the data embedding into digital images are based on the
frequency transformations. However use of similar transformations is connected to the …