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The generation of tilted perspectives from vertical 
photographs can be accomplished on the printer at present, 
but only a limited number have been generated. More of 
this will be accomplished as part of the in-house experi 
mental work being conducted. 
The unique analytical transforming characteristics 
of the printer will be the basis for experiments with 
radar and infrared imagery. In the case of IR imagery, 
the inherent geometric distortions are due to the scanning 
method, wherein the scanner runs at a constant angular 
rate while the imagery is recorded at a constant linear 
rate. The characteristic image shows compression at the 
edges. There are other distortions to be considered, but 
these distortion corrections should be only a bit more 
complex than those now done with panoramic materials, and 
can be handled with software. 
In a like manner, Side-Looking Radar imagery will be 
experimented with. Here the primary distortions are due 
to terrain relief and flight line and attitude anomalies. 
Once these are reasonably defined, plane and orthorecti 
fication can be accomplished. 
Strip camera imagery represents a recording that 
contains distortions along the flight line direction, 
due primarily to attitude changes. The imagery essentially 
has a principal point for each elemental line of exposure. 
If the locus of these principal points can be determined 
the imagery can be rectified on the Off-Line Printer. 
With the addition of terrain data, the imagery can be 
orthorectified. 
The above possibilities are cited in order to 
emphasize the great flexibility of the Off-Line Printer, 
based upon its ability to position any chosen elemental 
area of the input record at the optical axis, under 
computer control.