A
o
RESPONSE (%)
o
nN
o
DIFFUSE DENSITY
o
| 1 | | Ld
IS 20 30 40 50 60
SPATIAL FREQUENCY (cycles/mm)
1 1
1.0 20
1. Lens, film, image motion and total RELATIVE LOG EXPOSURE
system MTF's for a photogrammetric
camera system.
HD
Oo
DIFFUSE DENSITY
o
&
ul
o
=
SG
a
o
ui
Œ
no
o
|
1.0 20
LL LL | RELATIVE LOG EXPOSURE
6 10 15 20 30 40 50 60
SPATIAL FREQUENCY (cycles/mm)
Fig. 2. Shaded area represents the range of Wild and
Zeiss camera lens MTF's recorded by various
investigators. Also shown is a MTF for 20 um
of image motion, and TM curves for EK 2402 film
adjusted for different target contrasts.
100
80 LENS-IM 20 um
60
DIFFUSE DENSITY
H
o
| 1
10 20
RELATIVE LOG EXPOSURE
RESPONSE (%)
nN
[9]
Non-linearity problems
associated with the de-
termination of system MTF's
Lp | | | inimi 1
05 6 Ke) 15 20 30 40 50 60 nas be Alma Dy SIT AG
SPATIAL FREQUENCY (cycles/mm) a e arget 15 recorde
on the straight line portion of
The range (shaded area) is reduced when the D-log E curve as in 4a.
the lens MTF's are cascaded with that Avoid using targets recorded
for 20 um of image motion. TM curves on the toe and shoulder as in
are for EK 2402 film. 4b, c.
