Separation (G Dataflow)

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Last Modified: June 25, 2019

Separates touching particles, particularly small isthmuses found between particles.

This node performs n erosions where n equals number of erosions and then reconstructs the final image based on the results of the erosion. If an existing isthmus is broken or removed during the erosion process, the particles are reconstructed without the isthmus. The reconstructed particles have the same size as the initial particles, except that they are separated. If no isthmus is broken during the erosion process, the particles are reconstructed as they were initially found and no change is made. The source image must be an 8-bit binary image and have a border greater than or equal to 1 pixel. This node modifies the source image. If you need the original source image, create a copy of the image using the Copy Image node before using this node.

Inputs/Outputs
Compatibility

image src

Reference to the source image.

image dst

Reference to the destination image.

number of erosions

Number of erosions that are used to separate the particles.

Default: 1

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error	error in contains an error

If no error occurred before the node runs, the node begins execution normally. If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.	If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

structuring element

2D array that contains the structuring element to apply to the image.

The size of the structuring element, or the size of this array, determines the processing size. A structuring element of 3 × 3 is used if this input is not connected.

square/hexagonal?

Boolean that specifies whether to treat the pixel frame as square or hexagonal during the transformation.

True	Hexagonal
False	Square

Default: False (Square)

image dst out

Reference to the destination image.

If image dst is connected, image dst out is the same as image dst. Otherwise, image dst out refers to the image referenced by image src.

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

error in does not contain an error	error in contains an error

If no error occurred before the node runs, the node begins execution normally. If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.	If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application

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