In this paper we analyze the methods of optimal restoration of signals and images from the
degradations that are defined by the additive noise and blurring effects. The Wiener filters …

The aim of this paper is to present a transform-based framework for color image
enhancement which processes all three color components (R, G, B) simultaneously. In this …

ABSTRACT A novel quaternion color representation tool is proposed to the images and
videos efficiently. In this work, we consider a full model for representation and processing …

The semi-resolved CFD-DEM model, proposed in our previous paper (Cheng et al., 2018)
for the modelling of seepage-induced fine-particle migration through coarse skeleton in gap …

In recent years, quaternion algebra has been applied more and more in different
applications. A primary motivation for investigating quaternion algebras is to extend the …

The traditional Fourier transform is a fundamental tool in signal and image processing,
which in color imaging transforms images either in monochrome or as separate color …

Histogram equalization is broadly used for contrast enhancement. However, it does not take
brightness preservation into account. It is not suitable for real time applications like medical …

This paper presents a novel method for color image enhancement based on the discrete
quaternion Fourier transform. We choose the quaternion Fourier transform, because it well …

The S-box is utilized within different block ciphers and the complexity of encryption basically
relies on the quality of S-box. The quality of S-box could be measured by breaking down its …

There exist various implementations of the Retinex algorithm first developed by Edwin H.
Land and Mcann, all of which allow for varying amounts of user control of specifications …