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p.30 
Pig. 75 Output image (see text), Fig.8: Output image (see text) 
be used; of course if the resolution increased N times, the am 
ount of data increases NxN times and consequently a more power 
ful processing structure is needed if the efficiency has to re 
main the same. Thus the resolution must be chosen according to 
a careful evaluation of the precision to be obtained and of 
the performance to be gained. 
In further tests, with a higher resolution image scanner (MFA- 
150-LS) we would be able to specify the precision of the photo 
graphic set (metric camera and projector, and reticles) and of 
the scanning device, to be used in operating procedures. 
REFERENCES 
13 E; Baj, P.L. Casalini, S. Lombardi, À. Tonazzini: Automatic 
measurements of plate coordinates in order to obtain automa 
tic plotting. XV Congresso ISPRS, Rio de Janeiro, 1984. 
2) L. Azzarelli, M. Chimenti: Modular systems for remote sens- 
ing data processing. IEI-Report, Dec.1983. 
3) L. Azzarelli, M. Chimenti: Progetto e descrizione del micro- 
  
27 
fotometro automatico modello MFA/250/LS. PFI-P2-Territ(1983). 
4) L. Azzarelli, R. Bozzi, M. Chimenti, O. Salvetti: A software 
environment for digital image processing.IEI-Report,Dec.1983. 
5) E. Baj, P.L. Casalini, S. Lombardi, A. Tonazzini: Due metodi 
per la lettura automatica dei punti nodali di un reticolo lu 
minoso proiettato su un oggetto. Boll.Soc.Ital.Topografia e 
Pocogrammetria, n.3-4, 14997, 73-83;