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Set Pixel Line (G Dataflow)

Last Modified: June 25, 2019

Changes the intensity values in a line of pixels of an image.

Each pixels values input is specific for a particular type of image.

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image in

Reference to the source image.

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line coordinates

Four-element array specifying the pixel coordinates that form the end points of the line to modify.

The first two elements (left, top) in the array correspond to the coordinates for the first endpoint of the line. The last two elements (right, bottom) correspond to the second endpoint of the line.

If the size of the pxiel values input is greater than the number of pixels on the straight line between the line coordinates, the remaining pixel values in the pxiel values input will not be used. If the size of the pixel values input is smaller than the number of pixels on the straight line between the line coordinates, The pixel values are changed starting from the (left, top) pixel and continuing until all of the elements in the pixel values input are used. Any remaining pixels on the straight line between the line coordinates will not be modified.

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U8 pixel values

Array of unsigned 8-bit integers containing the new values for the pixel line.

This input is required if image in is an unsigned 8-bit image.

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U16 pixel values

Array of unsigned 16-bit integers containing the new values for the pixel line.

This input is required if image in is an unsigned 16-bit image.

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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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I16 pixel values

Array of signed 16-bit integers containing the new values for the pixel line.

This input is required if image in is a signed 16-bit image.

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SGL pixel values

Array of 32-bit floating point values containing the new values for the pixel line.

This input is required if image in is a 32-bit floating-point image.

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image 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.

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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.

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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