comp.lang.idl-pvwave archive: archive » Re: Overlay a coloured boundary on a gray scale image

Home » Public Forums » archive » Re: Overlay a coloured boundary on a gray scale image

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Overlay a coloured boundary on a gray scale image [message #81651]

Fri, 12 October 2012 03:00

titan
Messages: 59
Registered: March 2006

Member

On Thursday, October 11, 2012 1:46:51 PM UTC+2, titan wrote:
> Hi all,
>
> I have a grey scale image and I'm able to overlay the boundary of my region but it is in black.
>
>
>
> To improve its visualization I would like to color it(for example in blue)
>
>
>
> Is there a way to do it?
>
>
>
> since I have the array where the boundary indexes are stored, is there a way to associate to the the RGB triplet of a color?
>
>
>
> thanks in advance

Hi all,
probably my question is not clear :( and I'm sorry for this.
I try to explain it better:

I'm able to read a shapefile from which I'm able to obtain the corresponding image which is a binary one. Then I can extract those subscripts values where the boundary is

boundary_index = WHERE(boundary_array NE 0)

my gray scale image has the same dimension of the boundary image and as a consequence I can draw the line over it (in white)

image[boundary_index]=255

What I would like to do i to understand if I could draw this line not in white but in another color, for example yellow.

Is there this possibility?

thanks a lot

Report message to a moderator

[Message index]

		Re: Overlay a coloured boundary on a gray scale image By: titan on Fri, 12 October 2012 03:00
		Re: Overlay a coloured boundary on a gray scale image By: David Fanning on Fri, 12 October 2012 05:35

Previous Topic:	Contour plot
Next Topic:	Axes seemingly ignoring xtickinterval

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 18:22:22 PDT 2025

Total time taken to generate the page: 0.00400 seconds