An image containing itself to the infinity.
The Ultimate Escher’s Droste Effect - A logarithmic image transformation / HN

• How (and why) to take a logarithm of an image / HN
  • conformal map - using complex function to transform the complex plane
  • elliptic function - doubly periodic function in the complex plane
  • Eschers Print Gallery and the Droste Effect
  • Artful Mathematics: The Heritage of M. C. Escher

see also

• Magic of MC Escher