blobs order

[fala70]

how can I do to order the blobs by left,top to right,bottom... or
other orders ?

Stefano

[Nathan Oostendorp]

I'm not sure how to do it in cvblob, if there's not a function in the code for it it wouldn't be too hard to write.

in simplecv you can get the Blobs as a FeatureSet and sort/filter eg:

    blobs = img.findBlobs() #same params as CvThresh + CvLabel

    left_sorted = FeatureSet(sorted(blobs, key=lambda f: f.x))

    left_sorted_top_half_screen = left_sorted.filter(left_sorted.y() > img.height / 2)

It uses cvblob if you install my cvblob-python wrapper

http://sf.net/p/simplecv

[Cristóbal]

Check out this:

http://code.google.com/p/cvblob/wiki/FAQ#3.5_How_can_I_obtain_a_list_of_the_blobs_ordered_by_the_Y_coordi

Cristobal