How does software smooth lines?

Question

Photoshop and other digital paint apps have a &ldquo;smoothing&rdquo; option that causes lines drawn to be curvier. What&rsquo;s the math of it?

gus_massa · Accepted Answer

I'm not an specialist, but you can start with https://en.wikipedia.org/wiki/Spatial_anti-aliasing

billconan · Answer

you can read https://en.wikipedia.org/wiki/B-splinemost of them simply use a lasso method.