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Topic: plot gradient vectors over image
Replies: 3   Last Post: Aug 16, 2013 9:48 AM

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Josh Meyer

Posts: 48
Registered: 4/25/13
Re: plot gradient vectors over image
Posted: Aug 15, 2013 9:26 AM
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>"amira ali" <amiraali2005@gmail.com> wrote in message
> please
> how can i plot gradient vectors over image using this function
> [Gx,Gy] = gradient2( I )
> % Gx - [hxwxk] x-gradient (horizontal)
> % Gy - [hxwxk] y-gradient (vertical)
> thanks

I assume you mean "gradient" and not "gradient2"

At any rate, it sounds like you want the quiver function:
"quiver(x,y,u,v) plots velocity vectors as arrows with components (u,v) at
the points (x,y)."

More info here: http://www.mathworks.com/help/matlab/ref/quiver.html

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