Random dot pattern for BOS applications
makebospattern(N,D) makes a figure filled with N randomly distributed
dots of diameter D for "Background-oriented Schlieren" (BOS) 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). MAKEPIDPATTERN(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
Revision: 1.20, Date: 2008/09/05.
Help file generated by makehtmldoc 1.22