Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Individualised Halo-Free Gradient-Domain Colour Image Daltonisation

Version 1 : Received: 7 October 2020 / Approved: 8 October 2020 / Online: 8 October 2020 (09:33:55 CEST)

How to cite: Farup, I. Individualised Halo-Free Gradient-Domain Colour Image Daltonisation. Preprints 2020, 2020100167 (doi: 10.20944/preprints202010.0167.v1). Farup, I. Individualised Halo-Free Gradient-Domain Colour Image Daltonisation. Preprints 2020, 2020100167 (doi: 10.20944/preprints202010.0167.v1).

Abstract

Daltonisation refers to the recolouring of images such that details normally lost by colour vision deficient observers become visible. This comes at the cost of introducing artificial colours. In a previous work, we presented a gradient-domain colour image daltonisation method that outperformed previously known methods both in behavioural and psychometric experiments. In the present paper, we improve the method by (i) finding a good first estimate of the daltonised image, thus reducing the computational time significantly, and (ii) introducing local linear anisotropic diffusion, thus effectively removing the halo artefacts. The method uses a colour vision deficiency simulation algorithm as an ingredient, and can thus be applied for any colour vision deficiency, and can even be individualised if the exact individual colour vision is known.

Subject Areas

daltonisation; colour vision deficiencies; anisotropic diffusion

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