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Adherent raindrop detection - Level Sets

asked 2013-11-22 06:40:34 -0500

updated 2013-12-02 06:35:29 -0500

I'm attempting to detect adherent raindrops on a camera's field of view. Intensity change over time might be a good feature for detecting adherent rain drops, since intensity will be "more constant" on water droplets area. See image bellow.

image description

On the right there is the intensity change image, and the darker circular-ish areas correspond to adherent raindrop areas.

How would I proceed to locate and segment these areas? Any thoughts? I've read something about Level Sets, which are ways to segment image regions according to their intensity, but I'm really clueless as to how to implement such technique. Any thoughts?

Other ways to detect adherent raindrops are also welcome.

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answered 2014-03-10 13:30:02 -0500

Rui Marques gravatar image

updated 2014-03-10 13:31:11 -0500

That seems like a problem that would work nicely with simple approaches like applying some morphological operation like dilate and then do watershed to segment the black blobs.

You did the hardest part: having big black blobs which are the drops.

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Well, at the time I tried some simple approaches but it is harder than it looks :p I'm not working on this anymore though, but it is an interesting problem that is yet to be robustly solved.

Pedro Batista gravatar imagePedro Batista ( 2014-03-11 05:08:43 -0500 )edit
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Asked: 2013-11-22 06:40:34 -0500

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Last updated: Mar 10 '14