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widen the edge [message #54390]

Tue, 12 June 2007 11:57

Rodrigo
Messages: 3
Registered: May 2007

Junior Member

Hi,

i have a image that represents the edges of one image. It is a binary
image, 1 where the border exists. Currently the width of the border
is constant. How can i widen the edge in this case?

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Re: widen the edge [message #54479 is a reply to message #54390]

Wed, 13 June 2007 05:37

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Rodrigo writes:

> The image is inside a rectangle, and is an irregular edge ...
>
>
> I already tried dilate, but the widen seems to be only in x
> direction ...

Probably because you used a 1D structuring element.
Why so parsimonious about the details? You do want
help, don't you?

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: widen the edge [message #54480 is a reply to message #54390]

Wed, 13 June 2007 05:00

Rodrigo
Messages: 3
Registered: May 2007

Junior Member

The image is inside a rectangle, and is an irregular edge ...

I already tried dilate, but the widen seems to be only in x
direction ...

thanks ...

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Re: widen the edge [message #54483 is a reply to message #54390]

Tue, 12 June 2007 14:59

Kenneth Bowman
Messages: 86
Registered: November 2006

Member

In article <1181674655.780525.235490@a26g2000pre.googlegroups.com>,
Rodrigo <rodrigo.itajuba@gmail.com> wrote:

> Hi,
>
> i have a image that represents the edges of one image. It is a binary
> image, 1 where the border exists. Currently the width of the border
> is constant. How can i widen the edge in this case?

Brute force. For an ni x nj image and border width of w pixels:

image[*, 0:w-1] = 1
image[*,nj-w: *] = 1
image[0 :w-1,*] = 1
image[ni-w: *,*] = 1

Simple to put in a function.

Ken Bowman

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Re: widen the edge [message #54487 is a reply to message #54390]

Tue, 12 June 2007 14:10

Vince Hradil
Messages: 574
Registered: December 1999

Senior Member

On Jun 12, 1:57 pm, Rodrigo <rodrigo.itaj...@gmail.com> wrote:
> Hi,
>
> i have a image that represents the edges of one image. It is a binary
> image, 1 where the border exists. Currently the width of the border
> is constant. How can i widen the edge in this case?

DILATE?

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