Flat Field Correction (G Dataflow)

Region of interest (ROI) within which the flat field operation is computed.

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.

Reference to the source image.

Reference to destination flat field image.

Input used to correct image src.

Input used to correct image src.

You can create a dark field image by covering the camera lens and capturing an image.

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

Cluster of options that affect how the node creates the flat field image.

line scan image?

Boolean used to specify if image src is a line scan image.

If image src is a line scan image, set this parameter to True.

Default: False

correction factor

Mean bias computed from the flat field image.

Typically this parameter ranges from 1 to 1.5. Increasing this value will brighten image dst out.

Pre-computation of flat field images.

When enabled, the node consumes more memory to speed up the correction of subsequent images.

Corrected image result.

Duplicate reference to the flat field image.

Contains the computation table for faster correction if optimize correction is enabled.

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.