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Underwater Image Colour Balance by Grey World Approach with Attenuation Map

  • Sonali Sankpal
  • Shraddha Deshpande
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 810)

Abstract

Underwater images are degraded by attenuation of light in water. This attenuation depends upon wavelength and depth in water. One of the effects of degradation of image in water is absorption of colour giving greenish-blue hue to the image. Because of this colour fading of underwater images, colour correction is the first preprocessing step in underwater image processing. Many researchers attempted colour correction methods but most of it operates globally. Global colour correction methods give reddish effect to image. The method proposed in this paper used Grey World approach for colour correction, but it is modified using attenuation map. Use of attenuation map avoids saturation of colours and colour corrects only those pixels which are significantly attenuated. Results of the proposed method are compared with state-of-the-art methods by quality metrics mean square error, structural similarity index and entropy of image. It is seen that the proposed method in this paper gives better results than state-of-the-art methods.

Keywords

Grey world Attenuation map Colour correction Underwater image 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of E & TC EngineeringPVPITBudhagaon, SangliIndia
  2. 2.Department of Electronics EngineeringWCESangliIndia

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