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Linear Averages (G Dataflow)

Last Modified: June 25, 2019

Computes the average pixel intensity (mean line profile) on the whole or part of the image.

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image in

Reference to the source image.

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optional rectangle

Four-element array that contains the left, top, right, and bottom coordinates of the region to process.

The right and bottom values are exclusive and lie outside the region. The node applies the operation to the entire image if optional rectangle is empty or not connected.

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average types

Linear averages the node calculates.

If average types is empty, the node calculates all four types of linear averages.

Name Value Description
x axis Averages 0

Calculates the linear average along each column in the image

y axis Averages 1

Calculates the linear average along each row in the image

x + y axis Averages 2

Calculates the linear average along each diagonal running from bottom-left to top-right.

x - y axis Averages 3

Calculates the linear average along each diagonal running from top-left to bottom-right.

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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

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image out

Reference to the source image.

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x axis averages

Linear average along each column in the image.

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y axis averages

Linear average along each row in the image.

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x+y axis averages

Linear average along each diagonal running from bottom-left to top-right.

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error out

Error information.

The node produces this output 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.
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x-y axis averages

Linear average along each diagonal running from top-left to bottom-right.

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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