IMAQ Track Objects VI

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Updated2023-02-21
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Owning Palette: Tracking
Requires: NI Vision Development Module

Tracks user-defined objects from image to image.

Examples

IMAQ Track Objects

Object Tracking Session In is a reference to the object tracking session.

Image is the image containing an object to track.

Minimum Score sets the minimum score an object must have to be considered a match. The range of values is 0 to 1000, with 1000 as a perfect match.

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.

	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.
	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.
	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.

Object Tracking Session Out is a reference to the object tracking session.

Image (duplicate) is the reference to the image that contains the object to track.

Objects (pixel) indicates the objects found in the image, in pixel coordinates.

	Label is the label of the object in the tracking session.
	Score is the score of the object being tracked.
	Angle indicates the starting angle of the object to track. This parameter only applies when using the Shape Adapted Mean Shift algorithm.
	Location indicates the x- and y-coordinates or the object being tracked.
	Bounding Box is an array that defines the boundary of the object being tracked in the image.
	Object Found? is a boolean indicating whether the object was found in the image. When TRUE, the object was found.

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.

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

Objects (real-world) indicates the objects found in the image, in real-world units.

	Label is the label of the object in the tracking session.
	Score is the score of the object being tracked.
	Angle indicates the starting angle of the object to track. This parameter only applies when using the Shape Adapted Mean Shift algorithm.
	Location indicates the x- and y-coordinates or the object being tracked.
	Bounding Box is an array that defines the boundary of the object being tracked in the image.
	Object Found? is a boolean indicating whether the object was found in the image. When TRUE, the object was found.

Examples

Refer to the following for an example that uses this VI.

LabVIEW\examples\Vision\Tracking\Object Tracking.vi

NI Vision for LabVIEW

Table of Contents

IMAQ Track Objects VI

Examples