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Image processing flowchart. (a) a stack of axially swept WFFM images, (b) an all-in-focus image reconstructed by using an image stacking algorithm (FSTACK), (c) a magnified image from the selected region of interest (ROI) in the all-in-focus image, (d) a contrast enhanced image by using bilateral filter and contrast-limited adaptive histogram equalization, (e) a binary image, (f) a formula for GC density calculation.
