685nm
Without
DCMU
With
DCMU
Fig. 9. Processed multi-colour
fluorescence images of a maize
plant displaying the fluorescence
ratio I(685nm)/I(bluei The
upper image is the same as the
processed image in Fis. S and
the lower image is recorded half
an hour later after application of
the herbicide DCMU.
remotely measured spectra have a
very good signal-to-noise ratio even for single-shot recordings. The measurements performed with the
imaging system show that particularly the divided image, where influences of distance and non-uniform
laser intensity are eliminated, can be used to see differences in the vegetation which occur due to different
environmental parameters.
5. ACKNOWLEDGEMENTS
This work w'as supported by the Swedish Natural Science Research Council and the Swedish Space Board.
