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A comparative study of conventional and deep learning approaches for demosaicing Mastcam images

Bayer pattern is a low cost approach to generating RGB images in commercial digital cameras. In NASA's mast camera (Mastcams) onboard the Mars rover Curiosity, Bayer pattern has also been used in capturing the RGB bands. It is well known that debayering (also known as demosaicing) introduces color and zipper artifacts. Currently, NASA is using a demosaicing algorithm developed in early 2000’s. It is probably the right time to assess some state-of-the-art algorithms and recommend a more recent and powerful approach to NASA for its future missions. In this paper, we present results of a comparative study on the use of conventional and deep learning algorithms for demosaicing Mastcam images. Due to lack of ground truth, subjective evaluation has been used in our study.