Visual exploration of overlapping neural structures. (a) An example of three-dimensional microscope images with a depth ~1.3 mm from the surface layer of the cortex. (b) Tomographic image of apical dendrites. The low contrast area shadowed by the blood vessels is shown within the red dashed lines. Volume visualization results obtained by (c) (d) a traditional intensity-based 1D TFs and (e) the proposed method, which succeeds in locally improving the visualization result.