[Insight-users] How to draw a curve or a straight line into an image ??

[Dženan Zukić]

well, approximately like this:

   - clear image (set all pixels to zero)
   - for x=0 to image.size(0)
   - y=m*x+c
   - if y>=image.size(0) OR y<0 continue;
   - else image.setpixel(x,y,1)
   - next x

For parabola, you need to explicitly solve it for y to use above approach,
or solve for x and iterate over y and calculate x.
This approach doesn't do anti-aliasing, of course. If you need
anti-aliasing, you can use Xiaolin Wu's
algorithm<http://en.wikipedia.org/wiki/Xiaolin_Wu%27s_line_algorithm>
.

On Fri, Oct 12, 2012 at 10:57 AM, Raviteja, Allaparthi <
Allaparthi.Raviteja at philips.com> wrote:

>  Hi,
>
>
>
> I have been stuck with the problem of drawing a parabola of the form
>  ((y-k)*(y-k))=4a(x-h) and drawing a line of the form y=mx+c  into an image
> in ITK  .Could someone please help me out .
>
>
>
> Regards,
>
> Ravi Teja.
>
>
>
>
>
>
>
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