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Get Color Pixel Value (G Dataflow)

Last Modified: June 25, 2019

Read the pixel values from a color image.

This node returns the pixel value as either an unsigned 32-bit integer or a cluster of four unsigned 16-bit integers, depending on the bit depth of Image. You can convert the 32-bit integer into a cluster containing three elements possessing either (R, G, B), (H, S, L), (H, S, V), or (H, S, I) using the Integer To Color Value.gvi node.

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image in

Reference to the source image.

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x coordinate

Horizontal coordinate of the pixel.

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y coordinate

Vertical coordinate of the pixel.

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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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U32 pixel value

Numeric indicator that returns the pixel value as an unsigned 32-bit integer.

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U64 pixel value

Numeric indicator that returns the pixel value as a cluster of four unsigned 16-bit integers.

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Plane 1 (Red)

Value of the red plane.

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Plane 2 (Green)

Value of the green plane.

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Plane 3 (Blue)

Value of the blue plane.

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Plane 4 (alpha)

Value of the alpha plane.

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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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