Forums > Jitter

extracting vertices of blob contour ?

February 28, 2007 | 11:16 am

Hi All,

cv.jit is really a great tool but is there any object to extract the
x,y vertices of the contour of a blob?
e.g. something similar to what you find in Processing with the JMyron
or BlobDetection libraries (see

http://www.processing.org/reference/libraries/index.html)

best,

Yves Bernard yb@imal.org
asbl iMAL vzw
rue d’Alost straat 7
1000 Bruxelles/Brussel
tel 32 2 213 37 10

http://www.imal.org
http://www.erg.be/blogs/artNumeur

http://www.i-cult.be


March 1, 2007 | 12:38 am

You could try something with cv.jit.binedge (or cv.jit.canny). It depends on what you want to do with the data.


March 1, 2007 | 2:06 am

If you don’t mind coding up some C, I have an unreleased and half
finished object that uses OpenCV to get the contours of blobs in
vector graphics form. Let me know and I can post it.

wes

On 2/28/07, Jean-Marc Pelletier wrote:
>
> You could try something with cv.jit.binedge (or cv.jit.canny). It depends on what you want to do with the data.
>


March 1, 2007 | 6:50 am

Hi Jean-Marc,

all these produce pixel-images, not x,y vector lists.
it is true that all your shape analysis objects provide a large
toolset to make shape pattern analysis/recoginition; but it is useful
in many cases – analysis and processing – to have a vector based
ouptut of blobs.

best

>You could try something with cv.jit.binedge (or cv.jit.canny). It
>depends on what you want to do with the data.


Yves Bernard yb@imal.org
asbl iMAL vzw
rue d’Alost straat 7
1000 Bruxelles/Brussel
tel 32 2 213 37 10

http://www.imal.org
http://www.erg.be/blogs/artNumeur

http://www.i-cult.be


March 1, 2007 | 6:52 am

Thanks!
this would give me a good reason to start developing externals…
i will need some time to learn to set up the environment and the
max/jitter SDK…

yes, mail it!

>If you don’t mind coding up some C, I have an unreleased and half
>finished object that uses OpenCV to get the contours of blobs in
>vector graphics form. Let me know and I can post it.
>
>wes
>
>On 2/28/07, Jean-Marc Pelletier wrote:
>>
>>You could try something with cv.jit.binedge (or cv.jit.canny). It
>>depends on what you want to do with the data.
>>


Yves Bernard yb@imal.org
asbl iMAL vzw
rue d’Alost straat 7
1000 Bruxelles/Brussel
tel 32 2 213 37 10

http://www.imal.org
http://www.erg.be/blogs/artNumeur

http://www.i-cult.be


March 1, 2007 | 11:37 am


March 1, 2007 | 5:46 pm


March 2, 2007 | 7:57 am


March 16, 2007 | 5:31 pm


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