Table Of Contents

Learn Color (G Dataflow)

Last Modified: June 25, 2019

Extracts the color features of the image.

Use this node for color matching or other applications that require with color information, such as color identification and color image segmentation.

connector_pane_image
datatype_icon

image in

Reference to the color image from which to learn color information.

datatype_icon

ROI descriptor

Regions in the image that contain the colors to learn.

If ROI descriptor contains multiple regions, the node accumulates color information in each region before learning. If ROI descriptor is empty or not connected, the node considers the entire image as a single region.

datatype_icon

global rectangle

Coordinates of the bounding rectangle.

datatype_icon

contours

Individual shapes that define an ROI.

datatype_icon

ID

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

datatype_icon

Type

Shape type of the contour.

datatype_icon

Coordinates

Relative position of the contour.

datatype_icon

color sensitivity

Sensitivity of the color information in the image.

Set to High Sensitivity to distinguish colors with close hue values.

Default: Low

datatype_icon

learn saturation threshold

Threshold value to distinguish two colors with the same hue value.

Default: 80

datatype_icon

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

datatype_icon

image out

Reference to the source image.

datatype_icon

color spectrum

Color features found in the image region.

These features represent the color information in the image region in a compact form.

datatype_icon

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


Recently Viewed Topics