Abstract
Low contrast and noisy photographic pictures can be considerably improved by image-processing techniques. Techniques like histogram equalisation produce high-contrast images but often fail to preserve the colour texture information. To overcome this deficiency, a contrast-enhancement approach has been devised, using virtual contrast image fusion (in Haar wavelet domain). This technique has been evaluated by a study of the optical textures of nano-dispersed decyloxybenzoic acid with small quantities of Fe3O4 and ZnO added.
Acknowledgements
Authors like to express their deep gratitude towards the department of ECE, K L University, Vaddeswaram, The Hindu College, Machilipatnam, for their continuous support and encouragement during this work.
ORCID
V.G.K.M. Pisipati http://orcid.org/0000-0003-2382-4400
B.T.P. Madhav http://orcid.org/0000-0002-6893-6978