Individual Measures
[Image Analysis]
The Individual Measures category contains analysis engines applying a measurement on each label of the input image. More...
Classes | |
| class | SoFilterAnalysisQuantification |
 SoFilterAnalysisQuantification engine removes from the input label analysis labels whose measure does not fulfill a filter formula. More... | |
| class | SoFilterByMeasureProcessing |
| SoFilterByMeasureProcessing engine allows filtering objects given a target measure and a filter criterion. More... | |
| class | SoLabelAnalysisQuantification |
| SoLabelAnalysisQuantification engine performs measurements on objects from a label image. More... | |
| class | SoLabelFilteringAnalysisQuantification |
| SoLabelFilteringAnalysisQuantification engine computes measurements on objects from a label image and filters the result according to a given formula. More... | |
| class | SoLabelFilteringProcessing |
| SoLabelFilteringProcessing engine filters objects from a label image according to a given formula. More... | |
| class | SoMeasureImageProcessing |
| SoMeasureImageProcessing engine allows to replace all labels of the input image by the result of an individual measure. More... | |
| class | SoSieveLabelingProcessing |
| SoSieveLabelingProcessing engine produces a new label image by grouping labels of the input label image. More... | |
Detailed Description
The Individual Measures category contains analysis engines applying a measurement on each label of the input image.
For an introduction, see section Image Analysis
Most of these engines have a field to set one or several input measurements.
Label filtering from an image
- Object filtering allows removing or keeping shapes from a binary or label image according to measurement criteria. Some engines need a formula to define the filter to apply.
How to define a filter formula
- Following engines filter an image with criteria defined in a formula:
- + - / * ** : The basic mathematical operators (addition, subtraction, division, multiplication, power)
- ! : Unary negation
- < > <= >= != == : Comparison operators less, greater, less or equal, greater or equal, not equal and equal
- && || and or : Logical operators and, or, and and or
- Moreover an element of a distribution can be accessed by the operator []
- FeretInputX[2] : The third element of the distribution FeretInputX
The formula syntax accepts the following list of available mathematical and logical operators:
e.g., : To define a filter the equivalent diameter measurement for an analysis:
labelFilter->inFilter = SoDataMeasurePredefined::getName(SoDataMeasurePredefined::EQUIVALENT_DIAMETER_2D) + "< 50"