Direction of maximum change of intensity in gradients

I compute space-time gradients of each pixel of video frames and all this gradient must be pointing in direction of maximum change of intensity in space-times. How can i do it?

[shab shekan]

I don't know what's the problem.Is the question very hard and complicated?there are many expert in this site, but nobody can answer!!!

[Walter Roberson]

I don't understand the question. Some examples might help.

Answer 1

[Image Analyst]

Look at the example in the help for the quiver() function.

[shab shekan]

let me explain my question. I have to compute space-time gradient around each pixel, and the size of this space time is 7*7*3.

actualy, I have a volume of gradient, and I have to determine the maximum change of intensity in this volume, and all gradients on that volume must be point to direction of maximum change of intensity.

I can't use quiver() function for this problem.

By the way, thank you so much.