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140interior to the land which had initially been classified into the water segment havenow been properly classifed into one of the land segments. Figure 5.27 gives theICM refinement of the segmentation; we can see that much of the noise in theland interior has been smoothed out, while the tideline is still quite clear. Themorphological smoothing step, shown in figure 5.28, smooths the land further, butthe tideline becomes more obscure.In both the ICM classification (figure 5.27) and the post-morphology classification(figure 5.28), the water is well-characterized by the darkest segment. Thesecond-darkest segment corresponds to shallow tidewater near the bright beach, aswell as combining with the third-darkest segment to characterize most of the dryland. Although the second-darkest segment comprises both dry land and shallowtidewater, these two land types are spatially separated by the beach. The twobrightest segments correspond to the beach, which is quite reflective. The thirdbrightestsegment is transitional; it fills in between dry land and water in regionswhere the beach is not evident, as well as capturing the small hill in the upperright hand corner of the image.Comparison of the classifications in figures 5.27 and 5.28 provides a good exampleof the fact that one needs to know the goals of the analysis in order to knowhow much smoothing is reasonable. Figure 5.27 yields good spatial separation ofthe water and land, along with detail in the tidal area; however, the interior of theland and the water near the tideline are both a bit cluttered. Figure 5.28 smoothsout much of the clutter in the image while preserving the location of the tideline,but detail in the tideline is lost.