Constrained Spectral Unmixing (segmentation)
Use the spectral information from pure samples in the endmembers to create objects from the expression criteria for segmentation.
Parameters
Expression
Write in the expression you want to apply. The following comparators can be used for the expression:
Equals -
=
And -
&Or -
|Less than -
<Less or equal -
<=Larger -
>Larger or equal -
>=Different from -
!=
Example: (Filename of end member 1) > 1 | (Filename of end member 2) < 0.5
Method
Use one of the following regression methods to compare the end members spectrum to the measurements:
None Negative Least Squares
Sum To One Least Squares
Scatter correction
Select one of the options below
None
No scatter correction applied.
Baseline
A constant scatter correction is applied.
Slope
A linear scatter correction is applied.
Parabola
A quadratic scatter correction is applied.
Expression (Optional)
To include extra expression.
Range
Write in the wavelength range to use. If left empty all wavelengths are included.
End Members (1-10)
Select files containing End members for each pure sample.
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:
AreaLengthWidthCircumferenceRegularityRoundnessAngleD1D2XYMaxBorderDistanceBoundingBoxArea
Shrink
Takes away x numbers of pixels at the borders of the objects included in images.
Separate
Select one of the options below
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.