Full text: Proceedings (Part 1)

a A EI NEI 
COMMISSION II 
INSTRUMENTATION FOR DATA REDUCTION 
APPAREILLAGES D'EXPLOITATION DES DONNEES 
AUSWERTEINSTRUMENTE 
President: Dr. G. Inghilleri (Italy) 
Secretary: Dr. B. Astori (Italy) 
Monday, July 12, 1976, from 15.15 to 16.00 
Session 1 of Commission Il 
Topic: Business Meeting 
Chairman: Dr. G. Inghilleri (Italy) 
1. Activities of the Commission in the Past Period 
The President summarized the activities covered 
in the printed report and thanked all who had 
contributed to the work of the Commission. 
The Working groups of Commission ll during 
1972— 1976: 
WG 1/2 Standard Tests 
Chairman: Dr. M. Déhler (F.R.G.) 
WG 11/3 Automated and Digital Instruments 
Chairman: Mr. K. Korimoto (Japan) 
WG 11/4 Orthophoto Equipments 
Chairman: Dr. T. Blachut (Canada) 
2. Activities of the Commission During the 
Congress 
It was pointed out by the President that one of 
the most important tasks is the drafting of the 
Resolutions concerning the future activities 
of the Commission. The following persons were 
appointed to draft the Resolutions: Dr. B. 
Makarovié (Netherlands) as chairman, Dr. H. 
Schéler (G.D.R.), Dr. T. J. Blachut (Canada), 
Dr. Inghilleri, Dr. J. Case (U.S.A.), Mr. M. Baus- 
sart (France), and Dr. L. Wassiljew (U.S.S.R.). 
3. Future Activities of the Commission 
The President suggested the continuation of 
Working Group 1I/4, "Orthophoto Equipments", 
for performing further experimental work on 
comparing apparatuses and for allowing im- 
provements of the techniques. 
The proposal to split Working Group II/3 into 
two was accepted. The new Working Groups 
would be called "Automated Equipments" and 
"Analytical Instruments". One of the tasks of 
the latter one would be to define what exactly is 
meant by "Analytical Instruments". 
The President suggested that the eventual for- 
mation of any other Working Group should be 
discussed at the 2nd Business Meeting, where 
the new President of Commission Il would be 
able to participate. On this occasion it would 
also be convenient to assign new names to the 
existing Working Groups. 
Tuesday, July 13, 1976, from 14.00 to 15.30 
Session 2 of Commission Il 
Topic: Orthophoto Equipments 
Chairman: Dr. G. Inghilleri (Italy) 
The first Technical Session of Commission Il 
was opened by Dr. Inghilleri, President of the 
Commission, who reviewed the activities of the 
Commission during the past four years. He 
noted that a successful Symposium was held 
by Commission Il in Turin Italy, in October 1974. 
The theme of the session, Orthophoto Equip- 
ments, was then highlighted by Dr. T. J. Blachut 
of Canada who gave the Working Group Report 
on the International Orthophoto Experiment. 
Working Group Paper 
Dr. M. C. van Wijk (Canada) 
Authors: 
Dr. T. K. Blachut (Canada) 
Title: Results of the International Ortho- 
photo Experiment 1972—1976 
WGR 11/03 : 
The accuracy and resolution of orthophotos 
produced by several different equipments were 
compared. Every effort was made to perform 
comparable tests with the different instruments. 
The tests appeared to be quite definitive. One 
interesting test was to generate orthophotos 
from both the right and left photograph of a 
stereo pair of photos: the resulting orthophotos, 
when viewed in stereo, should form a perfectly 
flat model if produced without error. 
At the end of the presentation a discussion 
was sollicited by the chairman, asking for 
comments and remarks by the audience. 
Mr. G. Ducher (France) asked if the experiments 
on orthophoto would be continued. Dr. Blachut 
informed the audience that at the first Business 
Meeting the Commission Board had decided on 
the continuation of the Working Group on 
orthophoto, and that the new President of 
Commission Il would probably be a Frenchman, 
a photogrammetrist whom Mr. Ducher could 
easily contact. 
Dr. B. Makarovic (Netherlands) pointed out that, 
in the results of the experiments made, it is 
necessary to take into account that some instru- 
ments are automatic and others manual and 
suggested such a division for further investi- 
gation. Dr. Blachut answered, that so far the 
investigation is made with available commercial 
instruments for practical purposes, and it can be 
increased in future if the need arises. 
Dr. J. Case (U.S.A.) asked for information about 
the problems which are typical of productive 
work. He pointed out, that in future it will be 
suitable to separate profiling and orthophoto- 
printing. Dr. Blachut said that in a scientific 
experiment these types of problems cannot be 
dealt with. 
Ms. Fleming (Canada) asked about the quality 
of images particularly about the contrast. 
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