Here is a Processing sketch to create a simple stipple image and save it as a .svg file.
Feel free to edit, change or whatever except claim as your own.
The default image is a picture of my son.
It has only a few simple commands:
Left mouse button = reverse(invert) image
center mouse button = save a .svg image (will save as test.svg unless key (S) is used first
right mouse button = change stipple particle
+ and – increase and decrease spacing of stipple particles
L = selects an image to load
S = selects a save file to use (best before: using center mouse button)
D = display the image in the background
The zip file is ready to be placed in your sketchbook or anywhere you want to!