Morphological Image Operations¶
Performs one of a selection of morphological or rank operations on a target image (top) that uses a given structuring element (bottom). Other morphological operations can be found under the “filter” node
Documentation
Performs one of a selection of morphological or rank operations on a target image (top) that uses a given structuring element (bottom). Other morphological operations can be found under the “filter” node
Algorithms:
Stretches the local histogram defined by structuring element to cover the full range
- p0:
Defines the lower percentile (0..1) included in histogram
- p1:
Defines the upper percentile (0..1) included in histogram
binary, closing
Perform morphological closing on image. Target and structuring element must be binary
The morphological closing on an image is defined as a dilation followed by an erosion.
Closing can remove small dark spots and connect small bright cracks.
binary, dilation
Perform morphological dilation on image. Target and structuring element must be binary
Morphological dilation sets a pixel at (i,j) to the maximum over all pixels in the neighborhood defined by
the structuring element centered at (i,j). Dilation enlarges bright regions and shrinks dark regions.
binary, erosion
Perform morphological erosion on image. Target and structuring element must be binary
Morphological erosion sets a pixel at (i,j) to the minimum over all pixels in the neighborhood centered at (i,j). Erosion shrinks bright regions and enlarges dark regions.
binary, opening
Perform morphological opening on image. Target and structuring element must be binary
The morphological opening on an image is defined as a erosion followed by a dilation.Opening can remove small white spots and connect small dark cracks.
grey, closing
Perform greyscale morphological closing on image.
The morphological closing on an image is defined as a dilation followed by an erosion.
Closing can remove small dark spots and connect small bright cracks.
grey, dilation
Return greyscale morphological dilation of an image.
Morphological dilation sets a pixel at (i,j) to the maximum over all pixels in the neighborhood defined by
the structuring element centered at (i,j). Dilation enlarges bright regions and shrinks dark regions.
grey, erosion
Return greyscale morphological erosion of an image.
Morphological erosion sets a pixel at (i,j) to the minimum over all pixels in the neighborhood centered at (i,j). Erosion shrinks bright regions and enlarges dark regions.
grey, opening
Perform greyscale morphological opening on image.
The morphological opening on an image is defined as a erosion followed by a dilation.Opening can remove small white spots and connect small dark cracks.
median
Return the median of the neighborhood defined by sweeping the structuring element over the image.
When used on non-integer datatypes they are first cast into uint8
This operation functions as a filter suitable to removing salt and pepper noise
tophat, black
Return morphological black-tophat of image.
The black top hat of an image is defined as its morphological closing minus the original image.
This operation returns the dark spots of the image that are smaller than the structuring element.
Note that dark spots in the original image are bright spots after the black top hat.
tophat, white
Return morphological white-tophat of image.
The white top hat of an image is defined as the image minus its morphological opening.
This operation returns the white spots of the image that are smaller than the structuring element.
- Input ports:
target : image
Target image
structuring_element : image
Structuring element
- Output ports:
output : image
Resulting image
Definition
Input ports
- target
image
Target image
- structuring_element
image
Structuring element
Output ports
- output
image
Resulting image
- Configuration:
- Algorithm (algorithm)
(no description)
- p0 (p0)
(no description)
- p1 (p1)
(no description)
-
class
node_morphology.ImageMorphology[source]
