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1978 ISP COMMISSION V INTER-CONGRESS SYMPOSIUM - STOCKHOLM SWEDEN 
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Oshima: I am sorry that I did not hear your address. But I want to ask 
you something about the accuracy of the plotted result. In your figure 
we see the big differences in contour lines. In close range photogrammetry 
we need a more precise result. 
Danko: The MIT (Massachusetts Institute of Technology) measurements were 
inconsistent. Some were greater, some were smaller. And there is really 
nothing with which to compare them, when you think about it. Our results, 
and we did not know how many hours they cycled one or the other, showed 
wear in each instance. When MIT equated that with the pressures and 
pressure angles, which they put on the joint with their machines, they 
felt that our results were more reasonable than their results. 
We have really just shown the wear. You do not see two lines along the 
circumference. We lined up those as closely as we could, of course with 
control, and they came in well. But we just inked the wear curves for 
the purpose of the manuscript. 
$8 £-%3-8-8%8 8 $.8.8$.8 9.08 5 5. $ $ $ $ $ $% $ 8 5 5 
Paper by G. Simonsson - The Royal Institute, Stockholm 
"CLOSE-UP STEREOPHOTOGRAMMETRY USING A SINGLE CAMERA" 
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Discussion of the above paper 
  
Atkinson: You mentioned that you have obtained a very stable orientation. 
Have you figures to support your assertion about this improved camera 
support? 
Simonsson: I have no figures available, but I have made that investigation. 
Dauphin: You mentioned that this was very effective and one could perform 
an absolute orientation very quickly. How quickly? Can you give us some 
idea as to the saving in time? 
Simonsson: I have taken very many photographs with the SMK camera for 
making volume determinations of underground oil storage caverns, and when 
orienting those photographs it takes about five or ten minutes to perform 
the whole relative and absolute orientation. That is with a very stable 
camera combined with this method, and those photograph adjusting devices 
we have built. 
Oshima: I am really interested in the frame, which can deform with tem- 
perature changes and other things. There may be changes from day to night, 
Or seasonal changes. Do you use a certain constant temperature? 
Simonsson: No. 
Atkinson: What material was used in the construction? 
Simonsson: Aluminum. 
Oshima: That can have large temperature deformations. 
Simonsson: Yes I know, but we do not use the camera for purposes which 
require that sort of exactness. 
Oshima: What is the accuracy which you are trying to achieve? 
Simonsson: Two or three tenths of a millimeter. We are not striving for 
better accuracy, although I believe we are getting a somewhat better accuracy. 
The important thing is efficiency and a resulting reduction in cost.