ROI Descriptor is a descriptor that defines the Region of Interest (ROI) within which the particle filter is performed.

	Global Rectangle contains the coordinates of the bounding rectangle.
	Contours are each of the individual shapes that define an ROI. ID refers to whether the contour is the external or internal edge of an ROI. Type is the shape type of the contour. Coordinates indicates the relative position of the contour.

Connectivity 4/8 (8) specifies the type of connectivity used by the algorithm for particle detection. The connectivity mode directly determines whether an adjacent pixel belongs to the same particle or a different particle. The default is 8. The following values are possible:

Image Src is a reference to the source image.

Image Dst is a reference to the destination image.

Selection Values controls the criteria used to filter the particle in the image. This control is made of an array of clusters composed of the following values:

	Measurement Parameter is the measurement on which you want to filter.
	Range Lower Value specifies the lower value of the range for the chosen parameter.
	Range Upper Value specifies the upper value of the range for the chosen parameter.
	Range specifies whether to include or exclude the values given in Range Lower Value and Range Upper Value. When Range is Include (FALSE), the particle meets the criteria if Range Lower Value ≤ particle measurement < Range Upper Value. When Range is Exclude (TRUE), the particle meets the criteria if Range Upper Value ≤ particle measurement or particle measurement < Range Lower Value.
	Measurement Type specifies whether the measurement is in uncalibrated pixels or calibrated real-world values.

Keep/Remove Particles (F) controls whether particles that meet any of the criteria specified in Selection Values are removed. When Keep/Remove Particles is TRUE, particles meeting any of the criteria are removed. If FALSE, only particles meeting any of the criteria remain.

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.

Reject Border? (F), when TRUE, rejects border particles. The default value is FALSE.

Fill Holes? (F), when TRUE, fills holes in the binary object. The default value is FALSE. If Fill Holes? is TRUE and Reject Border? is TRUE, then holes in the binary object are filled after border particles are rejected.

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.

Number of Particles indicates the number of particles detected in the image.

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.