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ELECTRO-OPTICAL
IMAGING SYSTEM PERFORMANCE
FOURTH EDITION by
Gerald C. Holst
A consolidation of reference
material needed to design, analyze, and
evaluate imaging system performance. The
information is integrated from a wide range
of subjects in which the analyst must be
conversant: target characterization, atmospheric
effects, optics, detectors, electronics,
displays, and human perception of image
quality. The material could otherwise only
be obtained by sifting through dozens of
textbooks and journal articles. Although
emphasis is placed on infrared systems,
the principles apply to all imaging systems
operating in the visible region of the spectrum.
Describes the three-dimensional
noise model and various performance models
(1975 NVL model, FLIR92, and NVTherm) with
emphasis on NVThermIP. NVThermIP incorporates
atmospheric turbulence, prediction of the
National Imagery Interpretability Rating
Scale (NIIRS), and slant path atmospheric
transmission calculated by MODTRAN. Sampling
effects are incorporated in a MTF “squeeze”
factor. With the advent of more sensitive
systems, the display and eye may become
the limiting devices of the overall system
performance. The visible, near infrared,
and infrared models replace the fixed threshold
signal-to-noise ratio with a variable SNR
that depends upon the display luminance
and the target spatial frequency. Equally
important is the mapping from scene dynamic
range to display dynamic range.
The title of Chapter 11 has
been changed from Vertical MTF to Two-dimensional
MTF. It illustrates the differences between
polar symmetry (exhibited by optics) and
rectangular response (exhibited by detectors).
Under-sampled imagery is typically “blocky”
and has reduced resolution compared to an
equivalent analog system. The sampled-data
system resolution can be significantly improved
though super resolution reconstruction.
Chapter 14 has been expanded into 2 parts:
Digital Signal Processing and Spatial Sampling.
A never ending controversy is the selection
of an MWIR or LWIR imaging system. Nine
separate sections are devoted to this issue.
Using the engineering approach,
simple equations are provided for all subsystem
MTFs. When appropriate, approximations are
supplied to avoid complex equations. All
MTFs are supported by numerous graphs for
easy interpretation. Limitations of back-of-the-envelope
approximations are discussed. Clarifies
the difference between resolution and sensitivity.
Optimized system performance is illustrated
through numerous trade-off analyses.
300 figures, 65 tables, 360
references, 478+xiv pages (2006).
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