calculate the gradient in the x-direction and y-direction using the sobel operator in matlab

To calculate the gradient in the x-direction and y-direction using the sobel operator in Matlab, we can use the built-in function imgradientxy. Here's an example code:

main.m
I = imread('image.png'); % read in image
gray_I = rgb2gray(I); % convert to grayscale

[Gx, Gy] = imgradientxy(gray_I); % calculate gradients in x and y directions using sobel operator

figure; imshowpair(Gx, Gy, 'montage'); % display the gradients side-by-side
title('Gradient magnitude, Gx (left) and Gy (right), using Sobel operator');
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This code reads in an image and converts it to grayscale. Then, the imgradientxy function is used to calculate the gradients in the x and y directions using the Sobel operator. Finally, the gradients are displayed side-by-side using the imshowpair function.

Note that the imgradientxy function can also take an optional input to specify the type of gradient operator to use (e.g. Sobel, Prewitt, Roberts). By default, it uses the Sobel operator.