Weighted region properties

[anntzer]

Description

It seems a bit unfortunate that regionprops use unweighted properties by default even when the intensity_image is passed, and that one needs to pay attention to the entire docstring to realize that one needs to use the prop.weighted_foo variants instead of prop.foo to get the weighte centroid, etc. Moreover, certain properties (orientation, major/minor_axis_length) are not available in the weighted form (obviously I can compute them manually from the weighted moments...).

If backcompat was not a concern, I would think that prop.centroid, etc. should clearly have referred to the weighted variants when the intensity image is passed as argument; but I guess this ship may have sailed. Instead, I would suggest adding a clear note next to the doc for the intensity_image parameter pointing to the prop.weighted_foo properties, and also filling in the missing weighted properties indicated above.

[jni]

Well, yes, backcompatibility is indeed a major concern for us, and anyway, I think people generally think of orientation etc as relating to the unweighted image. But weighted variants of this, as well as updates to the documentation, would be welcome contributions. Otherwise we'll get to them eventually. =)

[anntzer]

I would think that if someone bother passing in an intensity array, it is not for it to be ignored, but heh.

[anntzer]

I guess one could just have a weighted_regionprops instead of duplicating each and every regionprop (and then the nonweighted regionprops could be implemented in terms of the weighted one).