Next Article in Journal
A Novel Parallel Auto-Encoder Framework for Multi-Scale Data in Civil Structural Health Monitoring
Previous Article in Journal
Long Length Document Classification by Local Convolutional Feature Aggregation
Article Menu

Export Article

Open AccessArticle
Algorithms 2018, 11(8), 111; https://doi.org/10.3390/a11080111

A Weighted Histogram-Based Tone Mapping Algorithm for CT Images

1
Department of Computer Science, Norwegian University of Science and Technology, 2815 Gjøvik, Norway
2
Department of Physics, University of Oslo, 0316 Oslo, Norway
3
Department of Diagnostic Physics, Oslo University Hospital, 0424 Oslo, Norway
4
Department of Forensic Sciences, Oslo University Hospital, 0424 Oslo, Norway
5
Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway
6
Department of Health Sciences in Gjøvik, Norwegian University of Science and Technology, 2803 Gjøvik, Norway
7
Department of Computer Science, Norwegian University of Science and Technology, 2815 Gjøvik, Norway
*
Author to whom correspondence should be addressed.
Received: 16 June 2018 / Revised: 16 July 2018 / Accepted: 20 July 2018 / Published: 25 July 2018
Full-Text   |   PDF [18365 KB, uploaded 25 July 2018]   |  

Abstract

Computed Tomography (CT) images have a high dynamic range, which makes visualization challenging. Histogram equalization methods either use spatially invariant weights or limited kernel size due to the complexity of pairwise contribution calculation. We present a weighted histogram equalization-based tone mapping algorithm which utilizes Fast Fourier Transform for distance-dependent contribution calculation and distance-based weights. The weights follow power-law without distance-based cut-off. The resulting images have good local contrast without noticeable artefacts. The results are compared to eight popular tone mapping operators. View Full-Text
Keywords: tone mapping; histogram equalization; CT tone mapping; histogram equalization; CT
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Völgyes, D.; Martinsen, A.C.T.; Stray-Pedersen, A.; Waaler, D.; Pedersen, M. A Weighted Histogram-Based Tone Mapping Algorithm for CT Images. Algorithms 2018, 11, 111.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Algorithms EISSN 1999-4893 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top