Random dot pattern for SS / BOS / FS-SS applications
makebospattern(N,D) makes a figure filled with N randomly distributed
dots of diameter D for SS (Synthetic Schlieren), BOS (Background-
oriented Schlieren) or FS-SS (Free-Surface SS) applications.
The figure format is portrait (ie, vertical) A4, 210x297 mm, and the
particle diameter D is in mm. Typical values are N=50000, D=1.
makebospattern(N,D,'b') makes black points on a white ground (by
default). makebospattern(N,D,'w') makes white points on a black ground.
makebospattern(N,D,'..',FILENAME) saves the result in a 300-DPI TIFF
figure. Use the standard Windows viewer to print the figure.
- If you zoom the figure, the particles are not resized: particles
are drawn in absolute units (points), while the paper size is in
physical units (centimeters).
- a 'particle' is a set of 4 concentric circles with increasing (or
decreasing) gray levels. The 'particle diameter' D is the diameter of
the outer circle; the inner circle has diameter 0.3*D. Depending on
the printer quality, the outer circle may not print correctly, so the
actual size may appear slightly larger or smaller than the requested
- for FS-SS applications, see the function surfheight for the
surface height reconstruction.
Published output in the Help browser