TITLE: How to find a conformal map of the unit disk on a given simply-connected domain
QUESTION [19 upvotes]: By the classical Riemann Theorem, each bounded simply-connected domain in the complex plane is the image of the unit disk under a conformal transformation, which can be illustrated drawing images of circles and radii around the center of the disk, like on this image taken from this site (Wayback Machine):

I am interested in finding such transformations for the simply-connected domains having natural origin: oak and maple leaves:
 
Is it possible to find and draw corresponding conformal maps?
Maybe there are some online instruments (like Wolframalpha or Maple) for doing such tasks.
The purpose of this activity is to obtain an attractive image for the cover of a textbook on univalent maps of the unit disk.

REPLY [20 votes]: The geometry processing group at Carnegie Mellon University recently developed an algorithm called Boundary First Flattening that allows you to efficiently and interactively compute conformal parameterizations of triangle meshes. You can download the software here: https://geometrycollective.github.io/boundary-first-flattening/
It is incredibly powerful and easy to use. Unlike almost all previous algorithms for conformal parameterization it allows for significant control over the boundary shape.

REPLY [14 votes]: You may want to look at Don Marshall's Zipper algorithm:
https://sites.math.washington.edu/~marshall/zipper.html

Added in Edit by T. Banakh. This Zipper algorithm yields the following image of the conformal map of the unit disk to an oak leaf.

Many thanks to Prof. Donald E. Marshall for producing this image (which I post here with his permission).