Background Properties

Statistical Estimator

Calculates the background as a single statistical value based on analysis of the entire image.

Click this button to configure the Statistical Estimator using the Region Statistics command.

Polynomial Fit

Calculates the background as the value of a polynomial fit to the entire image surface.

X, Y Terms

Enter the number of terms used for the Polynomial Fit method. For example, 1 term for X fits a constant value in the X (column number) direction, and 3 terms in Y fits a parabola in the Y (row number) direction.

Constant Value

Assigns a fixed value to the background, independent of the image brightness.

Corner Pixels

Specifies the percentage of pixels extending along each image edge outward from the corner to use or calculating the background. Here are several examples:

• A value of 50 means that the background sampling pixels extend 50% away from each corner to 50% along the image width and height. This causes 100% of each edge to be used for calculating the background.

• A value of 25 means that the background sampling pixels extend 25% away from each corner to 25% along the image width and height. This causes 50% of each edge, starting at the corner, to be used for calculating the background.

• A value of 0 means that only 1 pixel at each corner is used for calculating the background (4 pixels total).