`imgen` is an image generator, handy to produce default images.
If you are looking for complex image generation, data analysis
environments usually have very complex ways of creating signals. The
supported patterns so far are:

- 2d Airy function
- 2d Gauss function
- 2d Lorentz function
- Optical transfer function
- Point-spread function
- Random with uniform distribution
- Random with gaussian distribution
- Random with lorentzian distribution
- Binary disk
- Binary rectangle
- Uniform (constant) image
- 2nd degree polynomial in 2d
- Jitter test cube
- Mandelbrot set

Nicolas Devillard 2002-04-01