Image is a reference to the source image.

Number of Classes is the number of desired phases. This algorithm uses a clustering method and can use any value between 2 and 256. The default value is 2.

Image Mask is an 8-bit image specifying the region in the image to use for the calculation. Only those pixels in the original image that correspond to an equivalent non-zero pixel in the mask image are used for the calculation. The entire image is used in the calculation if Image Mask is not connected.

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.

Lookup Table is an array containing the values of the 256 transformed elements encoded between 0 and (n – 1), where n is the Number of Classes. You can connect this array to the IMAQ UserLookup VI to perform a threshold operation directly.

Threshold Data out outputs an array containing the Number of Classes compatible with the IMAQ MultiThreshold VI. The results range from 0 to (n – 1), where n is the Number of Classes.

	Lower value is the lowest pixel value to be taken into account during a threshold.
	Upper value is the highest pixel value to be taken into account during a threshold.
	Replace Value is the value used to replace pixels between the Lower value and Upper value. This operation requires that Keep/Replace Value (Replace) is TRUE.
	Keep/Replace Value (Replace) determines whether to replace the value of the pixels existing in the range between Lower value and Upper value. The default TRUE replaces these pixel values and the status FALSE keeps the original values. All pixels outside the range between Lower value and Upper value are set to 0. All values found between this range are replaced by the value entered in Replace Value if Keep/Replace Value (Replace) is TRUE.

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.