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A new image enhancement method considering both dynamic range and color constancy

journal contribution
posted on 2019-05-01, 00:00 authored by H Hassanpour, Najmeh Samadiani
This paper proposes an approach to improving color images suffering from low dynamic range by employing both histogram matching and histogram stretching techniques. In the first stage, the color image was transformed from RGB into HSV color space, in which the color information was separated from intensity. Then, an appropriate reference image was selected by comparing component V of the enhanced image with component V of the database images using a similarity measure. The selected image was used as the target image in histogram matching algorithm for enhancement. In the second stage, components V and S were linearly stretched in order to recover the image color information. Finally, using the treated V and S components and untreated component of H, the enhanced image was obtained in RGB color space by inverse transform. The qualitative and quantitative results showed that the contrast and color of the resultant image were greatly improved using the proposed method, which outperformed the current state-of-the-art methods.

History

Journal

Scientia Iranica: International Journal of Science and Technology

Volume

26

Issue

3

Pagination

1589 - 1600

Publisher

Sharif University of Technology

Location

Tehran, Iran

ISSN

1026-3098

Language

eng

Publication classification

CN.1 Other journal article

Copyright notice

2019, Sharif University of Technology.

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