The purpose of this article is to review what has been written on what other authors have
called quaternion wavelet transforms (QWTs): there is no consensus about what these …

Image colorization aims to produce a natural looking color image from a given gray-scale
image, which remains a challenging problem. In this paper, we propose a novel example …

This paper provides a new method to colorize gray-scale images. While the computation of
the luminance channel is directly performed by a linear transformation, the colorization …

Colorization is a process that converts a grayscale image into a colored one that looks as
natural as possible. Over the years this task has received a lot of attention. Existing …

In the last years, image and video colorization has been considered from many points of
view. The technique consists of the addition of a color component to a grayscale image. This …

Image colorization is the process of adding chrominance values to an input grayscale
image. A grayscale image is the one which contains only the intensity values. Colorization is …

This paper presents a novel colorization technique for hand-drawn grayscale images, such
as cartoons and sketches, based on reference natural images and simple user interactions …

Color edition is an important issue in image processing and graphic design. This paper
presents a deep color decomposition based framework for image recoloring, allowing users …

Many operations, such as color transfer, recoloring, and image decomposition, are involved
in the color manipulation of image editing. This paper introduces a simple, intuitive and …

Colorization is the process of adding color information to grayscale images. This operation
may be performed in various ways. The colorization may be automatic, without the user's …