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Representative endoscopic OCT images of guinea pig esophagus before and after L1-L0 norm minimization based de-noising and smoothing procedures. (a)-(c) are the original OCT image, image after the de-noising procedure, and image after the de-noising and smoothing procedures, respectively; (d)-(f) are the representative intensity profiles along imaging depth (in the units of pixel) corresponding to the A-scan labeled with red dashed vertical lines in (a)-(c).
