how to use imopen in matlab

The imopen function in MATLAB is used for performing morphological opening on a binary image. Morphological opening is a technique which removes small objects from the foreground of the image, while preserving the shape and size of larger objects. It is typically used to remove noise from binary images.

Here is an example of how to use imopen:

main.m
% Read in a binary image
binaryImage = imread('example.png');

% Define a structuring element (SE) using strel function
SE = strel('disk', 5);
% Performs morphological opening on the binary image using SE
binaryImageOpened = imopen(binaryImage, SE);

% Display the results
subplot(1, 2, 1);
imshow(binaryImage);
title('Original Image');

subplot(1, 2, 2);
imshow(binaryImageOpened);
title('Image after morphological opening');
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In this example, a binary image is read using imread, and a disk-shaped structuring element of radius 5 pixels is created using the strel function. The imopen function is then used to perform morphological opening on the binary image using the SE defined earlier. Finally, the original and processed images are displayed using imshow.