Generic multispectral demosaicking using spectral correlation between spectral bands and pseudo-panchromatic image

Abstract

Single imaging sensor-based multispectral imaging systems (MSISs) facilitate snapshot imaging with a multispectral filter array (MSFA). These single sensor-based MSISs need an effective image demosaicking method to generate the full-multispectral image from the mosaicked image captured by an imaging sensor with MSFA help. This paper proposes an effective and generic multispectral image demosaicking (MSID) method based on the concept of the pseudo-panchromatic (PPAN) image. The proposed MSID method accepts the mosaicked image capture with the help of preferred binary tree-based MSFA patterns. We estimate the PPAN image from the mosaicked image by utilizing the spatial filters developed carefully based on the spectral band’s relative placement in the binary tree-based MSFA pattern. Our proposed MSID method utilizes the spectral correlation between the PPAN image and the mosaicked image to generate the multispectral image. The proposed generic MSID method surpasses the existing generic MSID methods in different image quality parameters on the multispectral images from two benchmark multispectral datasets.