Intensity
Segment objects from measurements using intensities in the different bands/wavelengths
Parameters
Expression
Write expression. Band numbers are denoted b[N]
e.g. b1
and wavelengths are denoted w[N]
e.g. w1
. The following comparators can be used for the expression:
Standard arithmetic (+
,-
,/
,*
…) and comparison operators (=
,>
,<
…) as well as some mathematical expressions (…) and constant values (
) can be used in expressions.
Variable names that can be used in the expression:
MinValue
MaxValue
AvarageValue
Pretreatments
In button-up applied order ⬆️ , meaning UV is applied first then Center and so on.
Savitzky-Golay
Derivative
SNV (Standard Normal Variate)
Logarithm
Center
UV (Unit Variance) scaling
For more on each type of pretreatment see: Pretreatments
Min area
The minimum number of pixels for an object to be included.
Max area
The maximum number of pixels for an object to be included.
If 0 no maximum area is defined.
Object filter
Use an expression to further exclude unwanted objects based on shape.
Properties that can be used for the Expression:
Area
Length
Width
Circumference
Regularity
Roundness
Angle
D1
D2
X
Y
MaxBorderDistance
BoundingBoxArea
For details on each available property see: Object properties Details
Shrink
Takes away x numbers of pixels at the borders of the objects included in images.
Separate
Normal
Can have both separated and combined objects.
Separate adjacent objects
All objects are defined separately.
Merge all objects into one
All objects are defined as one.
Merge all objects per row
All objects per row segmentation are defined as one.
Merge all objects per column
All objects per column segmentation are defined as one.
Link
Only visible when applicable
Link output objects from two or more segmentations to top segmentation. Descriptors can then be added to the common object output and will be calculated for objects from all segmentations.
![](../__attachments/631668749/image-20230303-095316.png?inst-v=e71a6908-8716-4067-a364-accde5eac1f1)
Descriptors after object will be calculated for all three segmentations (Sample1, Sample2 and Sample3)
The segmentations must be at same level to be available for linking.
Example
Using band numbers
Expression: (b10 > 1.5 | b15 < 2) & b20 <= 1.2
Using wavelengths
Expression: (w980 > 1.5 | w1024 < 2) & w1200 <= 1.2
Use variables for the expression
Expression: w980 > AvarageValue