Fiber filter. (A) Input box with options for filtering fibers. (B) Image generated in which fibers passing the filter are randomly colored to more easily distinguish adjacent fibers. (C) Zoomed in of (B). Yellow arrows point to possible user selections as non-fiber objects. Pink arrows show fibers that did not pass the filter. Lower left pink arrow did not pass due to improper segmentation as depicted in Figure 2D. (D) After selection of fibers the user is asked if they would like to indeed delete them or complete the function operation.