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Re: plots [message #52823 is a reply to message #31799]

Fri, 02 March 2007 07:57

ashraf
Messages: 4
Registered: March 2007

Junior Member

These are integer pixel coordinates which form a closed boundary of an
object, so each pixel will have at least two neighbours. I guess my
question is how do you trace the boundary of an object if the all you
have is an 2D array of noncontiguous pixel coordinates.
Cheers
ashraf.

Paolo Grigis wrote:

> I don't believe there is a unique solution,
> how would you connect these points?
>
> x=[0,1,1,0,0.5]
> y=[0,0,1,1,0.5]
>
>
> Ciao,
> Paolo
>
> ashraf wrote:
>> Hello,
>> I have col and row coordinates of a polygon that I would like to plot
>> on an image using PLOTS function, but the data is noncontiguous, how
>> can I re-arrange the data so that it is contiguous, i.e. starting from
>> an arbitrary point on the polygon, the next point is the one coonected
>> to the first point say by moving anticlockwise and so on. Otherwise is
>> there another function in IDL that can plot noncontiguous data over an
>> image?
>> Thanks.
>>
>> ashraf.
>>

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[Message index]

		plots? By: bin_zheng_99 on Mon, 19 August 2002 15:33
		Re: plots By: David Fanning on Fri, 02 March 2007 08:13
		Re: plots By: ashraf on Tue, 06 March 2007 07:59
		Re: plots By: David Fanning on Fri, 02 March 2007 08:05
		Re: plots By: ashraf on Fri, 02 March 2007 07:57
		Re: plots By: Paolo Grigis on Fri, 02 March 2007 05:18

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