Radiography Contrast Enhancement: Smoothed LHE Filter a Practical Solution for Digital X-Rays with Mach Band. - Prasoon Ambalathankandy; Yafei Ou; Jyotsna Kochiyil; Shinya Takamaeda; Masato Motomura; Tetsuya Asai; Masayuki Ikebe (DICTA, 2019)