Corbett (1974), Welch (1974a,b), and Gliatti (1976). An alternative 
technique, Scale Matching Analysis (SMA) is described by Schowengerdt, 
et al. (1974 and Schowengerdt (1976). 
Resolution values are normally desired by photogrammetrists and 
estimates for both predicted and measured system resolution may be 
derived from MTF's. Various techniques are discussed by Welch (1972a) 
and Gliatti (1976). Other photogrammetric applications of MTF analysis 
techniques include: 1) as a quality control procedure (Mayer, 1974; 
and Welch and Hallida , 1975); 2) as a method for evaluating the 
cartographic reproduction process (Welch, 1972b); and 3) as a basis 
for estimating measurement precisions and accuracies (Ghosh, 1973; 
and Trinder, 1973). A review of recent applications of MTF's to pho- 
togrammetric problems is contained in Welch (1975). 
4.5 Image Assessment and Specification Meeting 
lmage assessment has become more important as the use of optics 
has increased such that international meetings attract a large audience 
and participants of specialists. The Rochester, N.Y., USA, meeting 
of May 1974 (reported here by Dutton, Institute of Optics, University 
of Rochester) was a joint project of the Optical Society of America 
and the Society of Photo-Optical Instrumentation Engineers with the 
cooperation of the International Commission for Optics and Sira 
Institute Ltd. 
L. R. Baker of Sira Institute served as general chairman. The 
meeting had very much an international character: of the 45 papers 
presented, roughly half were from the United States and Canada and 
the other half from Europe and Japan. 
Only OTF/MTF topics and individual papers that may be of particu- 
lar interest to photogrammetrists are mentioned here. A meeting report 
with a capsule summary of all the papers has appeared in Optical En- 
gineering23and the complete proceedings have been published.24 
4.5.1 Measurement of MTF or OTF for Imaging Devices 
About fifteen papers treated some aspect of this topic. 
K. Je Rosenbruch2? reviewed current instrumentation trends as exempli- 
fied by the equipment offered commercially, noting a "second generation" 
trend toward greater automation and inclusion of minicomputers. There 
were several papers on the use of interferometric methods, as opposed 
to image scanning methods for determining OTF, both well represented. 
Three papers dealt with imaging performance of satellite systems: 
Schowengerdt, Antos, and Slater26determined OTF for operational images 
from ERTS-1 by comparison with matching scenes photographed in higher 
fidelity from aircraft; Welch27 reported a performance analysis in 
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