Table Of Contents
Overlay Contour (G Dataflow)
Overlays a contour on an image.
group name
Group to which you want to add the overlay information.
If no name is specified, the overlay information is added to the default group.
image in
Reference to the source image.
contour image in
Reference to the image containing a contour.
contour options
Settings for the contour points in the overlay.
overlay?
color
Color of the overlay.
The alpha color channel is not supported. Setting the color to transparent has the same effect as selecting black.
width
Width of the overlay in pixels.
maintain width?
Boolean that specifies if the overlay is measured in screen pixels or image pixels.
| TRUE | Overlay is measured in screen pixels. |
| FALSE | Overlay is measured in image pixels. |
Overlays measured in screen pixels maintain the same width as you zoom in on the image. Overlays measured in image pixels will scale with the image and appear to increase in width as you zoom in on the image.
Default: TRUE
contour equation options
Settings for the contour equation in the overlay.
overlay?
color
Color of the overlay.
The alpha color channel is not supported. Setting the color to transparent has the same effect as selecting black.
width
Width of the overlay in pixels.
maintain width
Boolean that specifies to measure the overlay in screen pixels or image pixels.
Overlays measured in screen pixels maintain the same width as you zoom in on the image. Overlays measured in image pixels will scale with the image and appear to increase in width as you zoom in on the image.
| TRUE | Measures the overlay in screen pixels. |
| FALSE | Measures the overlay in image pixels. |
Default: FALSE
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
image out
Reference to the destination image.
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.
Overlay Behavior
Overlays are nondestructive and do not overwrite the underlying pixel values. You can save overlay information with an image by using the Read Image and Vision Information node. If you want to replace the underlying pixel values with the overlay values, use the Merge Overlay node.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application