ROI Descriptor specifies the ROI in which the VI performs this operation. The ROI must be a rectangle or rotated rectangle. If the ROI contains multiple contours, each contour is interpreted as a character location. Otherwise the VI searches the ROI for the expected characters. Leave this input unwired to use the entire image for this operation.

	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.

IMAQ OCR Session specifies the OCR session on which this VI operates. To create a session, use the IMAQ OCR Create Session VI.

Image is the source image for this operation.

Expected String contains the expected character values.

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.

Expected Patterns is an array of expected character values and character patterns. The VI only uses this value if Expected String is an empty string.

IMAQ OCR Session (dup) is the reference to the OCR session to which this VI operates.

Image (dup) has the same value as Image.

Verification Scores is the array of verification scores for the expected characters.

Note   Verification Scores is set to 0 for a character if the corresponding character class does not contain a reference character.

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.