Smoothen lines/Remove jagged edges from lines in a binary image

As the question states, how would I go about making the lines of the attached binary image smoother/less jagged?

[JEONGSU KIM]

can I know what method did you use for this image?

Answer 1

[Image Analyst]

Just blur it with conv2() or imfilter(), then threshold.

windowSize = 5; % Whatever odd integer you want that's more than 1.
kernel = ones(5)/windowSize^2;
blurredImage = conv2(grayImage, kernel, 'same');
binaryImage = blurredImage > 0.5;