... data¹

The general type float is the most convenient one for general purpose library; In mathematical morphology, a general type would rather be short, even if PDE-based approaches are now in fashion.

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... tools²

In future versions, C++ operator overloading capabilities will be used in order to get a more natural way of expressing formulas. For instance, minus(closing(f,B), f) will be replaced by closing(f,B) - f!.

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... border³

In the case of the input image being a graph, since the notion of border does not exist, calling border::adapt_copy is still valid but does not execute any code. Another approach is to set the border to $-\infty$ ( $+\infty$) in the case of dilation (erosion).

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... types⁴

The queue-based priority algorithm presented here is of course optimal for discrete data types. However, the user can alsa call it when data are floating values.

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