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 …

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 …

In this paper, we extend image enhancement techniques based on the retinex theory
imitating human visual perception of scenes containing high illumination variations. This …

In this paper, we propose a color image enhancement based on the single-scale retinex
(SSR) with a just noticeable difference (JND)-based nonlinear filter. In the proposed method …

On a basis of Retinex and YIQ color space, a new approach of color image enhancement is
presented in this paper. The original image in the RGB color space is converted to the YIQ …

A new algorithm of Natural Enhancement of Color Image (NECI) is proposed. It is inspired by
multiscale Retinex model. There are four steps to realize this enhancement. At first, the …

This paper presents a new technique for contrast enhancement for color images called
histogram shifting with alpha rooting. The novelty in the presented method consists in …

Image enhancement refers to processing images to make them more suitable for display or
further image analysis. So, image enhancement is a problem-oriented procedure for …

The current Retinex algorithm processes the RGB channels separately for color image
enhancement. However, it changes the ratios of RGB components and also causes some …

The purpose of this article is to describe effective methods in image enhancement and their
application in processing gray scale as well as color images. Methods of image processing …