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Get Pixel Line (G Dataflow)

Last Modified: June 25, 2019

Extracts the intensity values of a line of pixels.

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image in

Reference to the source image.

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line coordinates

Array specifying the pixel coordinates that form the end points of the line.

A line with the coordinates (0, 0, 0, 255) is formed from 256 pixels. Any pixels designated by line coordinates that lie outside the actual image are set to 0 in pixels line.

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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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U8 pixel values

Intensity values for the specified line of pixels used only for an 8-bit image.

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U16 pixel values

2D array of integers containing the pixel values that comprise the image used only for an unsigned 16-bit image.

The first index corresponds to the vertical axis and the second index corresponds to the horizontal axis. The node resizes image to be the same size as image pixels.

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I16 pixel values

Intensity values for the specified line of pixels used only for a signed 16-bit image.

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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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SGL pixel values

Intensity values for the specified line of pixels used only for a 32-bit floating-point image.

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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