Table Of Contents

Verify Text (G Dataflow)

Last Modified: June 25, 2019

Verifies the accuracy of the text in the image.

For each character, the node checks for the existence of a reference character for the expected character class and compares the character from the image to the reference character.

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ROI descriptor

ROI in which the node 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 node searches the ROI for the expected characters. Leave this input unwired to use the entire image for this operation.

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Global Rectangle

Coordinates of the bounding rectangle.

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Contours

Individual shapes that define an ROI.

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ID

Object specifying if contour is the external or internal edge of an ROI.

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Type

Shape type of the contour.

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Coordinates

Relative position of the contour.

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OCR session in

OCR session on which the node operates.

To create a session, use the Create OCR Session node.

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image in

Source image for the operation.

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expected string

Expected character values.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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expected patterns

Array of expected character values and character patterns.

The node only uses this value if expected string is an empty string.

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OCR session out

OCR session on which this node operates.

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image out

Reference to the source image.

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verification scores

Array of verification scores for the expected characters.

verification scores is set to 0 for a character if the corresponding character class does not contain a reference character.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application


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