o 
  
NORMALIZED EXPOSURE 
Oo 
C 
  
  
RESPONSE (96) 
a 
o 
LU ei 
40 60 80 100mm 
X DISTANCE 
  
N | | | | 
100 200 300 400 500 600 700 800 900 1000 
SPATIAL FREQUENCY (cycles/mm) 
(sin x)/x functions for microdensitometer 
slit widths of 1, 2, and 3 um compared to 
the MTF of a photogrammetric camera system. 
—'— PREDICTED AVERAGE 
——— RANGE AVERAGE 
  
  
  
  
RESPONSE (95) 
e 
  
  
10 
SPATIAL FREQUENCY (cycles/ mm) 
Fig. 6. Range average (measured) and predicted aver- 
age square-wave transfer functions for photo- 
grammetric camera systems. Standard devia- 
tion from the range average are also shown. 
N 
o 
  
RESPONSE ( Percent) 
Ld d | | | L4 | 
6 10 15 20 30 40 5060 
SPATIAL FREQUENCY (Cycles/mm) 
7. Edge traces (top), spread 
functions (middle) and measured 
MTF's (bottom) for panchromatic 
(1), color (2), b & w infrared 
(3) and color infrared (4) sec- 
ond-generation S-190A MPF 
photographs.