Open AccessDemosaicing scheme based on augmented inter‐channel correlation considering colour saturation
Author(s) -
Kim J.,
Park S.W.,
Kang M.G.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.0707
Subject(s) - demosaicing , mathematics , channel (broadcasting) , bayer filter , saturation (graph theory) , enhanced data rates for gsm evolution , color filter array , artificial intelligence , computer vision , computer science , image (mathematics) , image processing , color gel , color image , layer (electronics) , telecommunications , materials science , combinatorics , composite material , thin film transistor
Augmented colour difference gradients in the extended support region contribute to the reduction of high‐frequency loss in image reconstruction via a demosaicing process. However, distant gradients must only be used for highly inter‐channel correlated regions. Otherwise, the pattern grid remains, even after demosaicing. Herein, a demosaicing scheme is proposed, in which the geometric distances as well as the edge directions (as in a bilateral filter) are incorporated in order to calculate colour difference gradients weights. The inter‐channel correlation is closely related to the colour saturation. Thus, the weights are adaptively adjusted according to the inter‐channel correlation considering colour saturation. Experimental results show that the proposed scheme improves the results of a state‐of‐the‐art demosaicing process.