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MATRA OPTIC 
INTRODUCTION 
Most of the photogrammetric applications in the industrial 
field require analytical processing. 
If compared with data acquisition using mono- or stereo- 
comparators and off-line processing, the main advantages 
of using analytical stereoplotters are: 
- continuous stereo viewing 
- real time processing, which means direct results at the 
object scale of data measurements 
- possibility of re-orienting the stereamodel very quickly 
for later comparison or control 
One of the fundamental features of TRASTER, the analytical 
stereoplotter of MATRA is its stereoviewing display on a 
screen. 
If this design, unique for this type of equipment is very 
convenient for plotting from aerial photography, it is 
still more attractive in industrial application where 
generally operators and not experienced photogrammetrists. 
I think personally that this point is very important. 
In industry, like in any other non topographic application 
of photogrammetry, the users want to do their own data 
acquisition. 
It is not only due to the fact that only the user has a 
good knowledge of the need, but also for industrial property 
reasons, which require confidential work, that users cannot 
ask external specialists. 
TRASTER satisfies the following requirements. 
- we never saw anybody not having a good stereo view in a 
few seconds with its screen display. 
- several people can look at the same time when decisions 
have to be taken 
- no need for eye base adjustment 
- the equipment is very simple to use thanks to the real 
time logic unit developed to facilitate the operator 
reaching maximum efficiency especially during the setting 
phases, and thus minimizing the possibility of error. 
- very high comfort for the operator.