“…Modified valley emphasized automatic thresholding and morphology for color distorted background exclusion was adopted in [53]. Undesired background separation through morphology and edge operator as preprocessing was proposed in [54]. Median filtering, CLAHE, Bottom hat and contrast stretching for background removal [55], median filtering and bottom hat for background separation [56], CLAHE, thresholding, background exclusion and post filtration [57] have reported.…”