We consider signal and image restoration using convex cost-functions composed of a non-
smooth data-fidelity term and a smooth regularization term. We provide a convergent …

Enhancement of contrast and sharpness of an image is required in many applications.
Unsharp masking is a classical tool for sharpness enhancement. We propose a generalized …

In this paper, a class of weighted vector directional filters (WVDFs) based on the selection of
the output sample from the multichannel input set is analyzed and optimized. The WVDF …

The perception of color is of paramount importance since human observers routinely use
color information to sense the environment, recognize semantic objects of interest, and …

Digital pre-processing is a vital stage in the processing of the information contained in
multilayer computed tomography images. The purpose of digital pre-processing is the …

We propose a guided image contrast enhancement framework based on cloud images, in
which the context-sensitive and context-free contrast is jointly improved via solving a multi …

Enhancing the sharpness and reducing the noise of blurred, noisy images are crucial
functions of image processing. Widely used unsharp masking filter‐based approaches suffer …

The iterative truncated arithmetic mean (ITM) filter was proposed recently. It offers a way to
estimate the sample median by simple arithmetic computing instead of the time consuming …

This research work proposes a novel method to improve quality of animal leather images
using digital image processing approach. In this work, piecewise linear contrast stretch …

One of the most common degradations in medical images is their poor contrast quality. This
suggests the use of contrast enhancement methods as an attempt to modify the intensity …