Table Of Contents

Unwrap (G Dataflow)

Last Modified: June 25, 2019

Unwraps a circular strip from an image into a rectangular strip.

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image src

Reference to the source image.

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image dst

Reference to the destination image.

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annulus

Cluster of parameters that define a circular strip.

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center x

X-coordinate of the center of the circle or annulus.

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center y

Y-coordinate of the center of the circle or annulus.

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inner radius

Radius (in pixels) of the inner circle defining one edge of the circular strip.

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outer radius

Radius (in pixels) of the outer circle defining the second edge of the circular strip.

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start angle

First angle of the circular strip.

The angle is measured counterclockwise from the x-axis of a coordinate system centered on the center of the circle or annulus.

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end angle

Second angle of the circular strip.

The angle is measured counterclockwise from the x-axis of a coordinate system centered on the center of the circle or annulus.

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orientation

Orientation of the image data within the circular strip.

Name Value Description
baseline inside 0

(Default) Specifies that the base of the image data is located along the inside edge of the circular strip.

baseline outside 1

Specifies that the base of the image data is located along the outside edge of the circular strip.

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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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interpolation type

Interpolation method used in the unwrapping process.

The following options are valid:

Name Value Description
Zero Order 0

Rounds to the nearest integral pixel location

Bi-Linear 1

Uses linear interpolation in both the x- and y-directions to compute the pixel location

Quadratic 2

Uses the quadratic formula to compute the pixel location

Cubic Spline 3

Uses cubic splines to compute the pixel location

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image dst 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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