IMAQ OCR Threshold Data 2 VI

Threshold Data specifies parameters that the VI sets if Get/Set is TRUE. The value of this cluster is ignored if Get/Set is FALSE.

	Dark Characters specifies how the characters appear in the image. FALSE indicates that the image contains light characters on a dark background. TRUE indicates that the image contains dark characters on a light background. The default value is TRUE.
	Number of Blocks specifies the number of blocks that OCR uses when Threshold Mode is Linear or Non-linear. Valid values range from 4 to 50.
	Threshold Limits specifies the upper and lower bounds of the threshold values used to calculate the threshold. Lower Value is the lower bound of the calculated threshold value. Upper Value is the upper bound of the calculated threshold value.
	Optimize For Speed TRUE enables OCR to use a faster, less accurate threshold calculation algorithm. FALSE enables OCR to use a slower, more accurate threshold calculation algorithm.
	Perform Bi-modal Calculation TRUE enables OCR to calculate both the low and high threshold values when Optimize for Speed is set to TRUE. The default is FALSE. If you set this item to TRUE, Dark Characters is ignored.

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

Threshold Mode specifies the thresholding method that the VI sets when Get/Set is TRUE. This value is ignored if Get/Set is FALSE. For more information, see Optical Character Recognition Concepts and Terminology. The following values are valid:

Fixed Threshold Range specifies the fixed threshold range when Threshold Mode is set to Fixed Range and Get/Set is TRUE. Fixed Threshold Range is ignored for all other values of Threshold Mode or if Get/Set is FALSE.

	Lower value specifies the lower bound of the threshold range.
	Upper value specifies the upper bound of the threshold range.

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.

Get/Set (True: Set) specifies whether the VI gets or sets the property value. TRUE sets the property value. FALSE gets the property value.

Threshold Data Out is the current value of the advanced threshold data.

	Dark Characters specifies how the characters appear in the image. FALSE indicates that the image contains light characters on a dark background. TRUE indicates that the image contains dark characters on a light background. The default value is TRUE.
	Number of Blocks specifies the number of blocks that OCR uses when Threshold Mode is Linear or Non-linear.
	Threshold Limits specifies the upper and lower bounds of the threshold values used to calculate the threshold. Lower Value is the lower bound of the calculated threshold value. Upper Value is the upper bound of the calculated threshold value.
	Optimize For Speed TRUE enables OCR to use a faster, less accurate threshold calculation algorithm. FALSE enables OCR to use a slower, more accurate threshold calculation algorithm.
	Perform Bi-modal Calculation TRUE enables OCR to calculate both the low and high threshold values when Optimize for Speed is set to TRUE.

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

Threshold Mode Out is the current value of the thresholding mode.

Fixed Threshold Range Out is the current value of the fixed threshold range.

	Lower value specifies the lower bound of the threshold range.
	Upper value specifies the upper bound of the threshold range.

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.

Niblack Deviation Factor (0.2) specifies the k constant used in the Niblack local thresholding algorithm, which determines the weight applied to the variance calculation. Valid k constants range from 0 to 1. The lower the Deviation Factor, the closer the pixel value must be to the mean value to be selected as part of a particle. Setting the Niblack Deviation Factor to 0 will increase the performance of the VI because the VI will not calculate the variance for any of the pixels.

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

Threshold Mode specifies the thresholding method that the VI sets when Get/Set is TRUE. This value is ignored if Get/Set is FALSE. For more information, see Optical Character Recognition Concepts and Terminology. The following values are valid:

Threshold Data specifies parameters that the VI sets if Get/Set is TRUE. The value of this cluster is ignored if Get/Set is FALSE.

Look For (Bright Objects) indicates the type of objects for which you want to look. The following values are valid: Bright Objects (0) Looks for objects in the image represented by pixels with values greater than the value computed by the threshold method. Dark Objects (1) Looks for objects in the image represented by pixels with values less than the value computed by the threshold method.

Window Size (32x32) is a cluster specifying the size of the window the VI uses when calculating a local threshold. The window should be sized as large as possible but small enough that each window contains pixels with consistent levels of contrast. The VI will produce inconsistent results for windows that contain uniform pixel values. A typical window should be about the size of the object you want to segment in the image. SizeX is the size of the window in the x dimension. The size must be at least 3 and cannot be larger than the width of Image Src. SizeY is the size of the window in the y dimension. The size must be at least 3 and cannot be larger than the height of Image Src.

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.

Get/Set (True: Set) specifies whether the VI gets or sets the property value. TRUE sets the property value. FALSE gets the property value.

Niblack Deviation Factor indicates the k constant used in the Niblack local thresholding algorithm.

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

Threshold Mode Out is the current value of the thresholding mode.

Threshold Data Out indicates the threshold parameters that the VI set.

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.

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

Threshold Mode defines the image color format to use for the operation. For more information, see Optical Character Recognition Concepts and Terminology. Choose from the following values:

Threshold Data is a cluster used to determine the thresholding range for the mode chosen in Threshold Mode.

	Red or Hue Range is a cluster used to determine the thresholding range for the red or hue plane. Lower value is the minimum pixel value in the red or hue plane that is used for the threshold. The default is 0. Upper value is the maximum pixel value in the red or hue plane that is used for the threshold. The default is 255.
	Green or Sat Range is a cluster used to determine the thresholding range for the green or saturation plane. Lower value is the minimum pixel value in the green or saturation plane that is used for the threshold. The default is 0. Upper value is the maximum pixel value in the green or saturation plane that is used for the threshold. The default is 255.
	Blue or Luma or Val or Inten Range is a cluster used to determine the thresholding range for the blue, luminance, value, or intensity plane. Lower value the minimum pixel value in the blue, luminance, value, or intensity plane that is used for the threshold. The default is 0. Upper value the maximum pixel value in the blue, luminance, value, or intensity plane that is used for the threshold. The default is 255.

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.

Get/Set (True: Set) specifies whether the VI gets or sets the property value. TRUE sets the property value. FALSE gets the property value.

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

Threshold Mode Out is the current value of the thresholding mode.

Threshold Data Out indicates the threshold parameters that the VI set.

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.