Stranica 146 [146]
Sz)
(a)
To correct an IRR image: Load an
image containing a Spectralon diffuse
reflectance grey scale or any number of
Spectralon diffuse reflectance standards
as available into the top box on the
“targets” thumbnail (Figure 3-40). This
image will be used to generate the
spectral density correction and can be
the image you want to correct or another
image taken with the same camera and
under the same lighting conditions. It
can remain in place for batch-processing
(see later) as long as the camera and
lighting conditions remain the same.
If available, load an image of a uniform
reflective board (under the same
experimental conditions) for flat fielding
into the bottom box on the “targets”
thumbnail and check the option to
"Flatfield IR reflectance with calibration
targets image" (Figure 3-41). If this is not
available leave this option unchecked.
Load the image(s) you want to correct
into the top box on the “object”
thumbnail (Figure 3-41). This can be the
Same image as above or another frame
(e.g. another frame in a series or a “twin”
image not containing the spectralon
diffuse reflectance standards, as
described in Chapter 2 and shown in
Figure 3-42) taken with the same
Camera and under the same lighting
conditions.
If available, load an image of a uniform
reflective board (under the same
experimental conditions of the image) for
flat fielding into the bottom box on the
“object” thumbnail (Figure 3-41 and
Figure 3-42) and check the option to
“Flatfield IR reflectance of object image”.
If this is not available leave this option
unchecked (as in Figure 3-42).
tkm vilstray / vilkm results
v E- IR reflectance xg
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v
E2 label | IR reflectance
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v | targets label | IR reflectance with calibration targets
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Header Flatfield IR reflectance with calibration targets image
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pflectance of object
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v
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flatfield
Pair_flatfield (targets.image) (label ++ " of object")
Pair_load "IR reflectance"
Figure 3-40
‘km |vilstray , vilkm results
v E- IR reflectance 9
2) e2) ] label | IR reflectance
i. targets label | IR reflectance with calibration targets
ar.
i image
use_flatfield |) Flatfield IR reflectance with calibration targets image
= hz
Pair_flatfield NULL (label ++ " with calibration targets")
a
v
a
v
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object label | IR reflectance of object
a 1
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use_flatfield / [7 Flatfield IR reflectance of object image
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Pair. flatfield (targets.image) (label ++ " of object")
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v
a
v
Pair_load "IR reflectance"
Figure 3-41
138
Date : 14/10/2013