Table Of Contents

Image to Array (G Dataflow)

Last Modified: October 24, 2017

Extracts (copies) the pixels from an image, or part of an image, into a 2D array.

This array is encoded in 8 bits, 16 bits, or floating point, as determined by the type of input 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 extract.

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

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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

Value of extracted pixels in a 2D array.

The first index corresponds to the vertical axis and the second index corresponds to the horizontal axis. The node resizes image pixels to be the same size as image or the size of optional rectangle. Use this output only when image is an unsigned 8-bit image.

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U16 pixel values

Value of extracted pixels in a 2D array.

The first index corresponds to the vertical axis and the second index corresponds to the horizontal axis. The node resizes image pixels to be the same size as image or the size of optional rectangle. Use this output only when image is an unsigned 16-bit image.

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I16 pixel values

Value of extracted pixels in a 2D array.

The first index corresponds to the vertical axis and the second index corresponds to the horizontal axis. The node resizes image pixels to be the same size as image or the size of optional rectangle. Use this output only when image is 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

Value of extracted pixels in a 2D array.

The first index corresponds to the vertical axis and the second index corresponds to the horizontal axis. The node resizes image pixels to be the same size as image or the size of optional rectangle. Use this output only when image is 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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