Figure 2From: Mathematical morphology-based approach to the enhancement of morphological features in medical imagesSelective extraction of features. (A) Original image f; target regions to be extracted are indicated by arrowheads. (B) Smoothing by SM(f ). (C) Feature extraction by δTH(f ). (D) Representation of the integer range of the signal shown in C; the entire signal range is shifted up to the integer range and then the minimum value is set to zero in the new range.Back to article page