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Opencv3.0 Shape Module, Compute Distance

asked 2015-04-18 05:14:07 -0500

Mimic gravatar image

updated 2015-04-18 05:28:46 -0500

berak gravatar image

Hi everoyne,

I wanted to use the shape module to compute Hausdorff distance and shape context distance between two shapes, but it give me the error

Assertion failed (set1.channels()==2 && set.1cols>0)

my Code :

InputArray src = imread("samples/5.jpg"); 
InputArray model = imread("samples/6.jpg");
Ptr<HausdorffDistanceExtractor> p = createHausdorffDistanceExtractor();
float dis = p->computeDistance(src, model);

So, why the input must be 2 channels ?

Thanks, Mimic

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answered 2015-04-18 05:28:25 -0500

berak gravatar image

if you read the docs , it says:

"A simple Hausdorff distance measure between shapes defined by contours"

in other words, it expects contours (e.g. from findContours) as input, not plain images.

please also have a look at samples/cpp/shape_example.cpp.

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Asked: 2015-04-18 05:14:07 -0500

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Last updated: Apr 18 '15