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Interpolate Disparity Image (G Dataflow)

Last Modified: June 25, 2019

Interpolates disparity values in a disparity image using polynomial interpolation.

Interpolation sets pixels to approximate values in cases where the Stereo Correspondence (Block Matching) node or the Stereo Correspondence (SG Block Matching) node cannot determine a disparity value, resulting in a smoother image.

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number of disparities

Maximum distance between the same point in the left and right rectified images.

You can use the Get Maximum Disparity node to compute this value if you know the minimum depth of the object under inspection from the camera.

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minimum disparity

Minimum distance between the same point in the left and right rectified images.

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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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process band

Boolean that determines how to compute the disparity.

True minimum disparity and number of disparities values are ignored and the node processes the entire image to compute the disparity.
False The overlap area is replaced with the invalid pixel value.

Depending on the overlap between the left image and the right image, the interpolated disparities in the overlap area may not be correct.

Default: False

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invalid disparity replace value

Pixel value assigned to invalid disparity values in the input disparity image. Use the same value that was used either in the Stereo Correspondence (Block Matching) node or Stereo Correspondence (SG Block Matching) node.

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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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order

Degree of the polynomial used for interpolating the disparity.

Valid values are 1 to 15.

Default: 6

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sampling frequency

Frequency with which the valid disparity points are sampled.

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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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