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Re: plot [message #68872 is a reply to message #68668]

Mon, 30 November 2009 23:56

rogass
Messages: 200
Registered: April 2008

Senior Member

On 5 Nov., 12:35, greg <greg.a...@googlemail.com> wrote:
>> I still think that the problem as stated
>> is ill-posed.
>
> I agree. If you take away the convex condition (as the OP seems to
> ask), then whatever the set of points you can keep reducing the
> surrounding area until you get to zero. You'll get some kind of
> spidery thing, but it's probably not what he had in mind.
>
> Greg

Dear Bing,
like many times the routines from David Fanning will help. So the
following approach solved my own "concavity problem". Here it is -
hope it helps:

function get_mult_inds_from_mask,mask,verbose=verbose
;lines must be 255b, background must be 0b)
; denies dfanning's find_boundary

mask= bytscl(mask)
sz = size(mask,/dimensions)
l = label_region(mask)
h = histogram(l)
n = n_elements(h)
rois=replicate(ptr_new(),n-1)
if keyword_set(verbose) then window,/free,xsize=sz[0],ysize=sz[1]
for i=1,n-1 do begin
r=find_boundary(where(l eq i),xsize=sz[0],ysize=sz[1])
rois[i-1] = ptr_new(lonarr(2,n_elements(r)/2)+1)
*(rois[i-1]) = [[r],[r[*,0]]]

if keyword_set(verbose) then plots, r[0,*],r[1,*],color=255/i
endfor
return,rois
end

Regards

CR

p.s.: My personal favourite is Davids selectimage - it's superb and
I'm hoping that he will extend this routine to open ENVI files (also
spectra)....

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[Message index]

		plot By: collier on Fri, 10 January 1997 00:00
		Re: plot By: David Fanning on Thu, 20 November 2003 05:52
		Re: plot By: Jeremy Bailin on Sat, 31 October 2009 07:39
		Re: plot By: pgrigis on Fri, 30 October 2009 13:57
		Re: plot By: David Fanning on Fri, 30 October 2009 13:47
		Re: plot By: pgrigis on Fri, 30 October 2009 12:58
		Re: plot By: David Fanning on Fri, 30 October 2009 12:39
		Re: plot By: pgrigis on Fri, 30 October 2009 12:32
		Re: plot By: R.G.Stockwell on Fri, 30 October 2009 11:53
		Re: plot By: Thibault Garel on Fri, 30 October 2009 09:50
		Re: plot By: David Fanning on Fri, 30 October 2009 09:33
		Re: plot By: Thibault Garel on Fri, 30 October 2009 09:23
		Re: plot By: rogass on Mon, 02 November 2009 15:25
		Re: plot By: David Fanning on Fri, 30 October 2009 08:01
		Re: plot By: Thibault Garel on Fri, 30 October 2009 07:25
		Re: plot By: David Fanning on Fri, 30 October 2009 06:06
		Re: plot By: Thibault Garel on Fri, 30 October 2009 05:55
		Re: plot By: David Fanning on Fri, 30 October 2009 05:11
		Re: plot By: pgrigis on Tue, 03 November 2009 06:41
		Re: plot By: greg.addr on Thu, 05 November 2009 03:35
		Re: plot By: rogass on Mon, 30 November 2009 23:56
		Re: plot By: David Fanning on Tue, 01 December 2009 05:08
		Re: Plot By: David Fanning on Fri, 09 December 2011 12:44
		Re: Plot By: David Fanning on Fri, 09 December 2011 12:34
		Re: Plot By: Russell[1] on Fri, 09 December 2011 12:23
		Re: Plot By: d.poreh on Fri, 09 December 2011 11:46
		Re: Plot By: d.poreh on Fri, 09 December 2011 10:28
		Re: Plot By: Russell[1] on Fri, 09 December 2011 08:09
		Re: Plot By: David Fanning on Fri, 09 December 2011 07:38
		Re: Plot By: d.poreh on Tue, 13 December 2011 10:20
		Re: Plot By: d.poreh on Mon, 19 December 2011 05:10
		Re: Plot By: Mark Piper on Tue, 13 December 2011 08:18
		Re: Plot By: d.poreh on Sat, 10 December 2011 06:09
		Re: Plot By: David Fanning on Sat, 10 December 2011 06:39
		Re: plot By: d.poreh on Sat, 21 July 2012 12:59
		Re: plot By: David Fanning on Sat, 21 July 2012 11:10
		Re: plot By: d.poreh on Sat, 21 July 2012 11:01
		Re: plot By: lecacheux.alain on Sat, 21 July 2012 06:44
		Re: plot By: David Fanning on Sat, 21 July 2012 06:14
		Re: Plot By: d.poreh on Fri, 15 February 2013 05:52
		Re: Plot By: David Fanning on Fri, 15 February 2013 05:40

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