- the observation in false stereoscopy of the two images which
do not possess a stereoscopical basis but a "basis" given by the qualitative-
quantitative difference between the two recordings; thus the contouring of
the so called "isophenomena" may be done in an analogical, very simple and
inexpensive way. This problem should be very attentively studied from a
theoretical point of view and adaptations to the analogical classical
plotting apparatus should be also done;
- the comparison of the equidensities of the two recordings
obtained by two way means, using photographical material specially made for
this purpose;
- the unsharp mask system in its analogous variant, using as mask
one of the photographic-recordings not the unsharp classical mask;
- the optical filtering in coherent light, in which case in the
filtering scheme the two images obtaining the correlogram K afferent to them
are used; the correlogram may be redisplayed under photographical aspect,
materializing the difference between the two recordings; using possibly the
comparison with a given signal a holographical scheme may be obtained - Fig.
4;
- digitally, either using the miscroscope-scanning photometer
system with digital or analogical display or by direct processing of the
recordings on magnetic tapes (CCT-computer compatible tapes).
Regarding the improvement of the signal/noise ratio (S/N) with
the efforts to assure the linearity, fidelity, repeatability of the records,
the following are mentioned:
- the "slicing" - dividing procedures of the images of multi
emulsion colour-conventional or colour-composite type, may be used with
success using the trichromie diagram and adequate sets of films. In the
situation in which we did receive until June this year only one ERTS-1
recording above Danube Delta of colour-composite type, the processings were
done by its "slicing" using filters, lightings and adequate photosensible
materials, i.e. combinations of these means. Thus we have simulated the
recordings from the bands 4, 5 and 7 and by mixture some intermediate ones
(one of them very close to the band 6). For the airborne recordings the
colour-composite images have been "sliced" for the simulation of the bands 4
and 5;
- the enhancement and mixing procedures made in the image plan or
by means of Fourier's double transforms, are also leading to good results in
the processing of the recordings for their interpretation.
CONCLUSIONS
There is in the field of photointerpretation - remote sensing,
and not only in it, a special interest due principally to the achievements