From: David Young on
"Sprinceana " <mihaispr(a)yahoo.com> wrote in message <hrq164$l0u$1(a)fred.mathworks.com>...

> I'm facing a similar problem in matlab with Hough transform ...

I don't think this is similar to the original problem, which concerns the underlying maths.

But anyway ...

> %Here is my problem when I apply hough function
>
> % apply hough transform
>
> H1 = hough(img1);
> figure, imshow(H1);

Try imshow(H1, []) (see the help information for imshow for what this does).