“A Semi-Global Color Correction for Underwater Image Restoration” by Ancuti, Ancuti, Vleeschouwer and Garcia
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Entry Number: 66
Title:
- A Semi-Global Color Correction for Underwater Image Restoration
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Abstract:
In underwater the light propagation is distorted due to the absorption and scattering, which respectively affect the energy and direction of propagated light. These distortions result in scenes with foggy appearance and poor contrast. Moreover, in underwater the colors are faded because their composing wavelengths are cut according to the water depth. Since the deterioration of underwater scenes results from the combination of multiplicative and additive processes, enhancing the visibility in underwater is a challenging task. Underwater single image based techniques [Ancuti et al. 2012, 2016a] have been introduced only recently and in general have been inspired by the outdoor dehazing strategies [Ancuti et al. 2010], [He et al. 2011], [Ancuti and Ancuti 2013], [Ancuti et al. 2016b]. One of the most influential technique was introduced by He et al. [He et al. 2011] based on the Dark Channel Prior (DCP) shown to fail for underwater dehazing (see Figure 1). Indeed, underwater image restoration is more challenging since the attenuation medium factor is color dependent and higher than in aerial conditions. Even if the transmission is well estimated the result image can not be effectively restored without initial image color spectrum restoration (see UDCP result in Figure 1).
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