Make outline of a image thicker

Question

I import a jpg image in my notebook. The result is like this:

I'm interested in the outline so I wrote this code: ColorNegate[ EdgeDetect[ColorNegate[AlphaChannel[RemoveBackground[test]]]]]

The result is:

The outline is 1 pixel. I want to make the outline thicker, for example 2 pixels. How can I do that?

Answer 1

I would use Dilation for this.

im = Import["https://i.sstatic.net/bp3Ci.jpg"];

edges = EdgeDetect[AlphaChannel[RemoveBackground[im]]];

thickerEdges = Dilation[edges, 5]