26.  Jaksic, Z. 
Canada 
MAN-MACHINE PHOTOGRAMMETRIC SYSTEMS 
AND SYSTEM COMPONENTS 
Under the influence of ideas from control and communication theory new trends have developed in the design 
of photogrammetric data processing systems. In this paper a number of concepts applied to the design of such 
systems are discussed, with emphasis on the digtal man-machine systems and system components. The main 
characteristics of contemporary photogrammetric systems are outlined both in regard to their hardware and 
software, including some remarks on automation and orthophoto-techniques. The general descriptions are 
supported by examples from two systems, one predominantly digital and the other predominantly analog. 
These examples concern the instrumental developments in the Photogrammetric Research laboratories of the 
National Research Council of Canada. 
27. Johnson, R.H. 
United States 
THE IMAGE PROCESSING SYSTEM FOR THE 
EARTH RESOURCES TECHNOLOGY SATELLITE 
The Image Processing System of the Earth Resources Technology Satellite (ERTS) will process video-tape 
recordings received from the satellite into imagery and digitized video data suitable for earth-resource study 
and analysis. The system is made up of three subsystems. The Bulk Processor produces 70-millimeter images 
and digitized records, corrected for systematic geometric and radiometric errors as well as for sensor- 
calibration and other errors. The Precision Processor modifies the bulk images to significantly increase 
geometric and radiometric precision. The Special Processor transfers the bulk or precision data to computer- 
compatible tape. This paper describes the performance of the Image Processing System and discusses some of 
the design trade-offs that were required to achieve this performance. 
28. Kowalski, D.C. 
United States 
NON-HOLOGRAPHIC COHERENT OPTICAL CORRELATION 
FOR AUTOMATIC STEREOPERCEPTION 
An increasing demand for topographic maps made from aerial stereophotographs has prompted the 
development of automatic stereo-perception equipment to speed map production. To date, automation has 
been achieved most successfully using electronic correlators and scanners. This paper presents the results of a 
study that was conducted to determine the feasibility of applying non-holographic coherent optical correlation 
techniques to the task. It describes an experimental optical photogrammetric two-image correlator capable of 
automatic optical tracking of stereo-images and of measuring relative stereo-image distortion. The optical 
measurement concepts involved are discussed, and hardware and optical-system performances are analyzed. 
Areas of work still to be undertaken are touched on briefly. 
29. Kratky, V. 
Canada 
PHOTOGRAMMETRIC SOLUTION FOR 
PRECISION PROCESSING OF ERTS IMAGES 
The imagery, formed aboard the Earth Resources Technology Satellite (ERTS) by the Return Beam Vidicon 
(RBV) cameras and by the Multi-spectral Scanning System (MSS), is radio transmitted to the earth and 
displayed by special reproducers. In the course of these operations, its geometry will be considerably distorted 
due to several factors. The character of the distortion depends mainly on the geometrical properties of the 
imaging systems and on the dynamic flight conditions. The geometry of both imaging systems is analyzed, and 
an appropriate analytical solution proposed that can provide corrections necessary for the precision processing 
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