Meaning of Hausdorff Distance Results in Meshlab

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I was trying to compare two meshes by using Hausdorff distance tool in Meshlab. I've got the results for a min, max, mean and RMS. However, there are two sets of results for each of these parameters. Can anyone tell me which one is the final result?

Hausdorff distance result

1 Answers

The first line of value are absolute measures, they are measured in your length units (for example millimeters). So max=43.519 mean that's the distante at the maximum gap between meshes.

The second line are normalized values. They are the same as previous but divided by the length of the bounding box diagonal of one mesh (in your case that diagonal is 333.82), so it is adimensional. So max=0.13 means that the maximum gap is 13% of your diagonal.

You get both values because sometimes you want to know the real distance, and sometimes you just want to know if the distance is important or not. 43mm is a big distance if you are comparing two tomatoes, but it is not important if you are comparing two mountains. Also it makes the measure independent of scale and units. 43 is a big distance measured in meters but not if measured in micrometers.

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