Non-binary Edge Detection

I'm in the process of writing an image alignment algorithm, and I cannot seem to figure out how to use the edge detection feature without returning a binary image. I've searched multiple forums, but I still can't seem to find an answer. Is there a step I'm missing?

example code:

A = imread('cameraman');
B = edge(A);
imshow(B)

How do I make this a gradient and not binary?

Answer 1

[Jeff E]

You'll want to use the IMGRADIENT function.

[Joe]

This is exactly what I was looking for. Thank you!