Erode an Image To Remove Thin Lines

This example shows how to erode a binary image using the imerode function.

Read a binary image into the workspace. Display the image.

BW1 = imread('circbw.tif');
figure
imshow(BW1)

Create a structuring element. The following code creates a diagonal structuring element object.

SE = strel('arbitrary',eye(7))
SE = 
strel is a arbitrary shaped structuring element with properties:

      Neighborhood: [7x7 logical]
    Dimensionality: 2

Erode the image, specifying the input image and the structuring element as arguments to the imerode function.

BW2 = imerode(BW1,SE);

Display the original image and the eroded image. Notice the diagonal streaks on the right side of the output image. These are due to the shape of the structuring element.

figure
imshow(BW2)