PIV.jl

An simple PIV processing package in Julia that I wrote for my experimental fluids class.

Note that the package is still under development. Currently there are 3 correlation methods:

1. Direct
2. Minimum Quadratic Difference (MQD)
3. Fast Fourier Transform (FFT)

Additional features include:

• Sub-pixel displacement (a 5 point Gaussian fit)
• A pre-processing contrast filter
• Some vector validation techniques:
  • Mean value test
  • median test using 8 neigbors
  • ratio of correlation peaks.
• Vector replacement
  • 8 neighbor average
  • Decimation
• Vorticity calculations. Derivatives will be calculated by:
  • Central Difference
  • 8 point circulation using trapezoidal integration.
  • Richardson Extrapolation
• Image set analysis

Features under development:

• Image set averaging