NI Vision for LabVIEW

IMAQ Interpolate Disparity Image 2 VI

  • Updated2023-02-21
  • 5 minute(s) read
Owning Palette: Locate Edges
Requires: NI Vision Development Module

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

Examples

IMAQ Interpolate Disparity Image 2

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Number of Disparities is the maximum distance (disparity) between the same point in the left and right rectified images. You can use the IMAQ Get Maximum Disparity 2 VI to compute this value if you know the minimum depth of the object under inspection from the camera.

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

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Image Src is a reference to the source image.

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Image Dst is a reference to the destination image.

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Process Band?, if TRUE, ignores the Minimum Disparity and Number of Disparities values, and processes the entire image to compute the disparity. Depending on the overlap between the left image and the right image, the interpolated disparities in the overlap area may not be correct. When FALSE, the overlap area is replaced with the invalid pixel value. The default value is FALSE (off).

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Invalid Disparity Value is the pixel value assigned to invalid disparity values in the input Disparity Image. Use the same value that was used either in the IMAQ Stereo Correspondence (Block Matching) VI or IMAQ Stereo Correspondence (SG Block Matching) VI.

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error in (no error) describes the error status before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.

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status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.

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code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.

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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

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Order controls the degree of the polynomial used for interpolating the disparity. Valid values are 1 to 15. The default value is 6.

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Sampling Frequency specifies the frequency the valid disparity points are sampled.

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Image Dst Out is a 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 contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.

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status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.

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code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.

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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

Examples

Refer to the following for examples that use this VI.

  • LabVIEW\examples\Vision\Stereo Vision\Compute Depth Image\Compute Depth Image.vi

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