Get border pixels of labelled region

[Payal Gupta]

hi juan....

i can't understand array after using find_contour which return a ndarray.
it is main prob i wanna find out contour array.


On Fri, Sep 13, 2013 at 6:07 AM, Juan Nunez-Iglesias <jni.soma at gmail.com>wrote:

> Hi Payal,
>
> I think we're getting somewhere. =) Thanks for the image.
>
> Questions:
> 1) Are you looking to segment out different cars? That is, do you want
> each car to have its own contour? With your current thresholding, you can
> see that the four cars on the right are all connected, so you would get a
> single contour of the whole blob, rather than a contour of each car.
> 2) I just saw the doc<http://www.mathworks.com.au/help/images/ref/bwboundaries.html>for bwboundaries. Do you want the interior holes of the objects to have its
> own contour, or do you want just a contour *around* each object and don't
> care about the interior? Also, do you care about parent/child object
> relationships? My guess is no to both these questions. For example, do you
> want a contour around the windshield of each car?
>
> Comments:
>
> Note that when you do rgb2gray on a thresholded RGB image, you no longer
> have a binary image, but a grayscale image with levels 0, 0.333, 0.667, and
> 1.0. I think you probably mean to do rgb2gray followed by threshold.
>
> Either way, my suspicion is that you want to segment the cars first (get
> one binary blob object per car), then find their contours. Am I right?
>
> Juan.
>
>
> On Thu, Sep 12, 2013 at 8:24 PM, Payal Gupta <erpayal2010 at gmail.com>wrote:
>
>> hi Juan...
>> i have done it.... :) :)
>> plz solve the contour problem. :( :(
>> reply me
>>
>> On Thursday, September 12, 2013 9:19:36 AM UTC+5:30, Juan Nunez-Iglesias
>> wrote:
>>
>>> On Thu, Sep 12, 2013 at 2:58 AM, Payal Gupta <erpay... at gmail.com> wrote:
>>>
>>>> hello...
>>>> i m also use this prog to count white pixel and black pixel bt i cant
>>>> save an image and cant count the pixel.
>>>> can you help me.
>>>>
>>>
>>> "white pixels" and "black pixels" will mean different things with
>>> different images. Can you send us a sample image?
>>>
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