Table Of Contents
Setup Learn Geometric Pattern (G Dataflow)
Sets parameters that are used during the learning process.
Run this node before using the Learn Geometric Pattern node.
curve parameters
Cluster containing information about how curves are extracted from the template image during the learn phase.
Extraction Mode
Input that specifies how the node identifies curves in the image.
| Name | Value | Description |
|---|---|---|
| Normal | 0 |
(Default) Select if you want the node to make no assumptions about the uniformity of objects in the image or the image background. |
| Uniform Regions | 1 |
Select if you want the node to assume that either the objects in the image or the image background consist of uniform pixel values. This allows the node to more accurately calculate the external curves of the objects. |
Edge Threshold
Minimum contrast a seed point must have for it to begin a curve.
Valid values range from 1 to 255.
Default: 75
Edge Filter Size
Width of the edge filter that the node uses to identify curves in the image.
| Name | Value | Description |
|---|---|---|
| Fine | 0 |
Sets to fine edge filter size. |
| Normal | 1 |
(Default) Sets to normal edge filter size. |
| Contour Tracing | 2 |
Sets to contour tracing edge filter size, which provides the best results for contour extraction but increases the time required to process the image. |
Min Length
Length, in pixels, of the smallest curve that you want the node to identify.
The node ignores any curves that have a length less than this value.
Default: 25
Row Search Step Size
Distance, in the y direction, between the image rows that the algorithm inspects for curve seed points.
Valid values range from 1 to 255.
Default: 15
Col Search Step Size
Distance, in the x direction, between the image columns that the algorithm inspects for curve seed points.
Valid values range from 1 to 255.
Default: 15
Max Endpoint Gap
Maximum gap, in pixels, between the endpoints of a curve that the node identifies as a closed curve.
If the gap is larger than this value, the node identifies the curve as an open curve.
Default: 10
Closed
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
learn geometric pattern setup data
String containing information about the setup parameters selected for the learning phase.
Connect this output to the Learn Geometric Pattern node or the Advanced Setup Learn Geometric Pattern node.
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.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application