What is different between gradient and imgradient functions in MATLAB

1. What does Imgradient do in Matlab?
2. What is the gradient of an image?
3. What is gradient magnitude in image processing?
4. How do you find the magnitude of an image?

What does Imgradient do in Matlab?

[ Gmag , Gdir ] = imgradient( Gx , Gy ) returns the gradient magnitude and direction from the directional gradients Gx and Gy in the x and y directions, respectively.

What is the gradient of an image?

Formally, an image gradient is defined as a directional change in image intensity. Or put more simply, at each pixel of the input (grayscale) image, a gradient measures the change in pixel intensity in a given direction.

What is gradient magnitude in image processing?

The gradient of an image measures how it is changing. It provides two pieces of information. The magnitude of the gradient tells us how quickly the image is changing, while the direction of the gradient tells us the direction in which the image is changing most rapidly.

How do you find the magnitude of an image?

The magnitude of the image gradient is given by √G2x+G2y and the direction by tanθ=GyGx, where Gx,Gy are the partial derivatives.