Digital image processing

Pure mathematics

Image enhancement

Mathematics

Image (mathematics)

Data mining

Epistemology

Philosophy

Artificial intelligence

Quality (philosophy)

Computer science

Field (mathematics)

Image quality

Image processing

Archives of Computational Methods in Engineering

Image enhancement plays an important role in improving image quality in the field of image processing, which is achieved by highlighting useful information and suppressing redundant information in the image. In this paper, the development of image enhancement algorithms is surveyed. The purpose of our review is to provide relevant researchers with a comprehensive and systematic analysis on image enhancement techniques and give them a valuable reference. Various image enhancement algorithms were mentioned and underlying difficulties, limitations, merits and disadvantages were discussed in applying these techniques in the past two decades with three aspects: supervised algorithm, unsupervised algorithm and quality evaluation, respectively. Further, we summarize some existing problems and analyze the future development trend of existing enhanced algorithms.

A Comprehensive Overview of Image Enhancement Techniques