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Fig. 13.11
Subset of aerial photograph (50 cm ground sampling distance)
The output from this command results in an 8 band GeoTiff image relating to
the different Simple image textures. We present the Energy and Entropy texture
features in Fig.
13.12
. It is clear to see how the different landcover types are char-
acterized by the image textures and how the homogeneous brightness values from
the aerial photographs result in smooth, continous textures. We can adapt the above
command to compute the advanced image textures by substituting “simple” with
“advanced” Fig.
13.13
.
otbcli_HaralickTextureExtraction -in ap_subset.tif
→
-parameters.xrad 2 -parameters.yrad 2 -parameters.xoff 1
→
-parameters.yoff 1 -texture advanced -out
→
ap_subset_simple.tif uint16
It is important to note that the
-parmaters.min
and
-parameters.max
defined the range of the co-occurence, which by default is set to 0:255 for 8 bit
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