Segment objects from measurements using expressions and models.
Write the expression for the segmentation, examples can be found below. The following comparators can be used for the expression:
Less than -
Less or equal -
Larger or equal -
Different from -
Select model to apply to the expression.
The minimum number of pixels for an object to be included.
The maximum number of pixels for an object to be included.
If 0 no maximum area is defined.
Use an expression to further exclude unwanted objects based on shape.
Properties that can be used for the Expression:
Takes away x numbers of pixels at the borders of the objects included in images.
Segment object classified to sample class. Expression:
class = sample
Segment object not classified. Expression:
class != none
Band index comparison
Indexing with 1 based index in band list. Expression
(B10 > 1.5 or B15 < 2) and B20 <=1.2)
Band names can also be used instead of band numbers in the example the band names are HE and LE.
HE > 20 and LE <40
Using wavelength number. Expression:
(W980 > 1.5 or W1024 < 2) & W1200 <= 1.2