DIGITAL IMAGE PROCESSING FACILITIES AT THE 
N.R.C.C. PHOTOGRAMMETRIC LABORATORIES 
S. El-HAKIM and D. HAVELOCK 
Photogrammetric Research Section 
Division of Physics 
National Research Council of Canada 
Ottawa, Canada KIA OR6 
ABSTRACT 
Equipment related to digital image processing in the photogram- 
metric research laboratories at NRCC is briefly described. As an illus- 
trative example, one near-realtime application to targetted objects is 
discussed. 
1.0 INTRODUCTION 
Digital image processing studies in the Photogrammetric Research 
section of the National Research Council of Canada (NRCC/PR) have 
addressed a variety of issues over the past few years. The general thrust 
has been toward understanding and developing digital techniques applicable 
to both realtime processing and digital image metrology. The diverse 
equipment obtained for these endeavours spans the range of digital data 
acquisition, computation and display. 
In the following section we will describe some of the digital 
image processing facilities at NRCC/PR which support our ongoing research 
efforts in "photogrammetric digital image processing". The final section 
discusses the use of a "realtime vision system" for fully automated 
measurement of 3-dimensional coordinates of targets on small objects. This 
application involves equipment and control functions for digital data 
acquisition and computation but, by virtue of its fully automated 
operation, image display is essentially unnecessary. 
2.0 DIGITAL IMAGE PROCESSING FACILITIES AT NRCC/PR 
Figure I sketches the principal digital image processing 
facilities in the photogrammetric research section at NRCC. Each of these 
systems is used in various studies relating to digital image processing. 
We will give a brief description of each of the systems and two digital 
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