Figure 4: Measurement sequence in the wire model 
  
4. Example 
An example wants to demonstrate some of the features of 
the program PALM. A car body surface has been prepared for 
photogrammetric measurements. By spraying it a highly tex- 
tured surface has been generated. A stereopair was taken 
with an UMK (focal length 100 mm) from a distance of appr. 2 
m. The base line was appr. 0.7 m. The control points for the 
absolute orientation have an accuracy of 0.1 mm. 
A set of planes vertical to the coordinate axes of the 
object coordinate system was defined having a distance of 25 
mm each. Thus profiles in x and y direction and contour 
lines were to be measured. In addition a boundary polygon 
was introduced by defining its coordinates in the left 
image. The test was run with one level in the measuring tree 
namely the lowest level using LSM with a window size of 
12 x 12 pixels. In case the matching fails it is repeated 
two times with window sizes of 14 x 14 and 16 x 16 pixels. 
The distance between consecutive points on an arc was chosen 
to lie between 1.5 and 15 mm in object space. 
The measurement of the image patch was performed three 
times: 
1.) Automatic measurement, as described above. 
2.) Automatic measurement, as described above but the set 
of planes chosen to lie between those of the first 
case. This was to have a fully independent set of 
measured points. 
3.) Manual measurement, with the planes having double 
density as in the first two cases and lying between 
and in the middle between them. 
Fig. 5 shows the point distribution and the derived con- 
tour lines with an intervall of 6.25 mm in a subsection of 
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