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access icon free Hue preserving-based approach for underwater colour image enhancement

  • Author(s): Guojia Hou 1, 2 ; Zhenkuan Pan 1 ; Baoxiang Huang 1, 2 ; Guodong Wang 1 ; Xin Luan 3
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  • Source: Volume 12, Issue 2, February 2018, p. 292 – 298
    DOI:  10.1049/iet-ipr.2017.0359 , Print ISSN 1751-9659, Online ISSN 1751-9667
© The Institution of Engineering and Technology
Received 15/04/2017, Accepted 29/10/2017, Revised 10/10/2017, Published 03/11/2017

In this study, a novel underwater colour image enhancement approach based on hue preserving is presented by combining hue–saturation–intensity (HSI) and HS–value (HSV) colour models. In this study, the proposed wavelet-domain filtering (WDF) and constrained histogram stretching (CHS) algorithms are operated on HSI and HSV colour models, respectively. The degraded image is first converted from red–green–blue colour model into the HSI colour model, wherein the hue component H is preserved and WDF algorithm is executed on the S and I components. Similarly, the image is further converted into the HSV colour model, wherein H component is kept invariant as well and CHS algorithm is applied on the S and V components. The authors' key contribution is that the H preserving method can improve image quality in terms of contrast, colour rendition, non-uniform illumination, and denoising. In addition, experimental results show that the proposed approach outperforms several other state-of-the-art algorithms.

Inspec keywords: image enhancement; image colour analysis

Other keywords: novel underwater colour image enhancement approach; HS–value colour models; WDF algorithm; HSI colour models; hue-saturation-intensity; hue preserving-based approach; image quality; red-green-blue colour model

Subjects: Optical, image and video signal processing; Computer vision and image processing techniques

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