Table Of Contents
Read Text 4 (G Dataflow)
Reads the text in the image.
The node identifies all objects in the image based on the properties that you set and then compares each object with every character in the character set file. For each object, the node selects the character that most closely matched the object. The node uses the substitution character for any object that did not match any of the trained characters. Use the substitution character property to specify the substitution character.
ROI descriptor
ROI in which the node performs the operation.
The ROI must be a rectangle or rotated rectangle. Leave this input unwired to use the entire image for this operation.
Global Rectangle
Coordinates of the bounding rectangle.
Contours
Individual shapes that define an ROI.
ID
Object specifying if contour is the external or internal edge of an ROI.
Type
Shape type of the contour.
Coordinates
Relative position of the contour.
OCR session in
OCR session on which the node operates.
To create a session, use the Create OCR Session node.
image in
Source image for the operation.
number of lines requested
Number of lines to read.
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.
Default: No error
orientation
Orientation of the image data within the circular strip.
| Name | Value | Description |
|---|---|---|
| baseline inside | 0 |
(Default) Specifies that the base of the image data is located along the inside edge of the circular strip. |
| baseline outside | 1 |
Specifies that the base of the image data is located along the outside edge of the circular strip. |
character reports
Additional information about each character that the node reads from the image.
character value
Identified character.
classification score
Degree to which the assigned character class represents the object better than the other character classes in the character set.
verification score
Verification score computed against the reference character for the character class.
If a reference character does not exist for the character class, the score will be 0.
verified
character statistics
Cluster containing statistics about the characters OCR segmented in the ROI.
threshold range
Range used to threshold the character.
lower value
Lowest pixel value used during a manual threshold.
Default: 128
upper value
Highest pixel value used during a manual threshold.
Default: 255
left offset
Left offset of the character bounding rectangles in the current ROI.
top offset
Top offset of the character bounding rectangles in the current ROI.
width
Width of each of the characters trained in the current ROI.
height
Height of each of the characters trained in the current ROI.
character size
Size of the character, in pixels.
OCR session out
OCR session on which this node operates.
image out
Reference to the source image.
number of lines read
Output that indicates the number of lines read.
read string
String that the node read.
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.
characters ROI
Array that specifies the coordinates of the character bounding ROI.
global rectangle
Coordinates of the bounding rectangle.
contours
Individual shapes that define an ROI.
ID
Control specifying whether the contour is the external or internal edge of an ROI.
type
Shape type of the contour.
coordinates
Relative position of the contour.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application