Wind tunnel digital imaging
Tests with low resolution CCD camera
in wind tunnel with 1 lamp - raw camera data
close-up (out of focus due to camera setting - contrast quite good
though)
overview - slightly better focus -
Conclusions
1280x1024 res camera would provide 2x resolution of these. Macro facility
on camera must be understood.
Camera quality setting should be max quality - above pics have artefacts
from compression (blocking).
A few image processing tests
Given that the resolution is low - and the compression blocks this had
to be restricted... this just gives a flavour of some visualisation tools
which might eventually help you.
contrast stretch
high-pass filtering
false colour - the blue normally seen is not optimal for the eye to
see contrast.