PIV Standard Image

Japanese version click here


The PIV Standard Images are provided for the evaluation of PIV techniques.
Please refer the 3D-STD page for images of three-dimensional data.
The PIV technique is roughly classified into two steps, i.e., Visualization and Image Processing. The Image Processing includes image enhancement, particle detection, particle tracking, image cross correlation, velocity averaging and erroneous evaluation. To evaluate the Image Processing technique for PIV, The following standard images are generated.
The original velocity distribution for STD image (#01-#08) can be downloaded using FTP or HTTP
The data file contains [x,y,u,v,w].


Standard Images

012D Wall shear flow/Reference JAVA/GIF Download
022D Wall shear flow/Large displacement JAVA/GIF Download
032D Wall shear flow/Small displacement JAVA/GIF Download
042D Wall shear flow/Dense Particle JAVA/GIF Download
052D Wall shear flow/Sparse Particle JAVA/GIF Download
062D Wall shear flow/Constant particle size JAVA/GIF Download
072D Wall shear flow/Large particle size JAVA/GIF Download
082D Wall shear flow/Large out-of-plane velocity JAVA/GIF Download
213D jet impingement/Reference JAVA/GIF Download
223D jet impingement/Large out-of-plane velocity JAVA/GIF Download
233D jet impingement/Dense Particle JAVA/GIF Download
243D jet impingement/Sparce Particle JAVA/GIF Download
412D jet flow JAVA/GIF Download

Custom-made Standard Images
Users can select the image parameters. The program automatically generate the standard images with the selected parameters. The velocity data are based on the No.01.


  1. Image size [W x H (pixel)]
  2. Particle Displacement [v (pixel/interval)]
  3. Non-dimensional Out-of-plane Velocity [w = w'/T (-/interval)]
    Out-of-plane velocity (w')[cm/interval] is divided by the laser light thickness (T)[cm].
  4. Ratio of Out/In-plane velocity [r (-)]
    Ratio of Out-of-plane velocity (w) to In-plane velocity (u,v)
  5. Image Vorticity [O (/interval)]
    O = (dv/dx - du/dy) * dt
    The vorticity is multiplied by the image interval. This parameter shows the image distortion.
  6. Number of Particle [N (n/image)]
  7. Particle Diameter [D (pixel)]
  8. Average [Xm]
  9. Standard Deviation [Xs]
  10. Maximum [Xx]

Data List of the Standard Images

No.W x H vmvsvx wmws rmox NDmDs MovieDownload
01256x2567.53.015.0 0.0170.0120.121.4 40005.01.4 JAVA/GIF 01
02256x25622.09.045.0 40005.01.4 JAVA/GIF 02
03256x2562.51.05.1 0.0060.0040.120.47 40005.01.4 JAVA/GIF 03
04256x2567.43.015.0 0.0170.0120.121.4 100005.01.4 JAVA/GIF 04
05256x2567.43.015.0 0.0170.0120.121.4 10005.01.4 JAVA/GIF 05
06256x2567.53.015.0 0.0170.0120.121.4 40005.00.0 JAVA/GIF 06
07256x2567.53.015.0 0.0170.0120.121.4 400010.04.0 JAVA/GIF 07
08256x2567.53.015.0 40005.01.4 JAVA/GIF 08
21256x2564.22.49.5 40007.02.0 JAVA/GIF 21
22256x2564.22.49.5 40007.02.0 JAVA/GIF 22
23256x2564.22.49.5 120007.02.0 JAVA/GIF 23
24256x2564.22.49.5 10007.02.0 JAVA/GIF 24
41256x2564.12.17.1 0.0060.0040.131.3 30006.02.0 JAVA/GIF 41