(Papantoniou, Maas, 1990) which includes 
calibration of a system of three CCD cameras, 
point positioning and tracking in order to derive 
turbulent flow velocity vectors 
• OLT, a program for on-line bundle triangulation, 
which uses Givens transformations for 
sequential estimation 
3.5. DIPS II computing performance 
The numbers that are given in the following refer to 
the Sun CPUs. No extra processor hardware was 
applied. It is obvious that the performance of the 
algorithms does not allow for video real-time 
applications, but with one exception (table tennis 
SUN 4/280S 
Image size: 592 x 574 
N.... Neighbourhood 
S Stepsize 
N/S « 2 ; bilinear interpolation of parameters 
bilinear interpolation 
(b) 
6 12 25 50 N 
SUN 4/280S 
Figure 4: Computing times for some characteristic image analysis functions: 
(a) Interest operator, gradient based 
(b) Wallis filter - linear stretch - bilinear interpolation 
(c) Image pyramid generation 
(d) Collinearity constrained stereo matching (It/sec number of iterations per second) 
• ORTHO, differential rectification 
• IMREG, image to image and image to map 
registration of remote sensing scenes 
Recently the HIPS software package (The Turing 
Institute, Glasgow) was acquired, which is the only 
third party program that is currently used on the 
system (so far its use has been restricted to 
educational purposes only). 
robot, Beyer, Faessler, Wen, 1989, a project which 
was not executed on our system) we were not yet 
required to provide for true real-time responses in 
any of our projects.