Banner PresencePLUS P4 COLOR Series - Manual (Page 114)

Description Control
Click this button to remove an ROI or mask from an image.
Use this field to rotate the ROI. You can manually key in
a rotation angle, or you can use the up or down arrow keys
to rotate the ROI.
Note: The angle used in the Rotation calculation is the Major Axis angle, measured with respect to the horizontal
plane. This angle is not reliable if the part rotates through ± 90 degrees because the Blob Find tool doesn't pay
attention to what is "top" or "bottom" on the Blob.
Threshold
Type
Fixed
Select Fixed when the lighting and image content will remain relatively constant for all inspections.
If you select Fixed , you can also specify Threshold and Reject Levels.
Threshold Level
The Threshold Level (e.g., 141) defines the white/black cutoff point. Once a threshold is chosen, any pixels brighter
than the threshold become pure white while those darker than the threshold become pure black.
Reject Level
The Reject Level field is for bright Blobs only, and is used to narrow the range of pixel intensities to consider in an
inspection. Leaving the defaults at 0 for low and 255 for high will result in the tool taking into consideration all gray
scale levels in the ROI from 0 (black) to 255 (white). Note that the Reject Level field is visible only when Bright bead
type is selected.
Adaptive
Select Adaptive when there are lighting changes that cause the acquired image to change.
Banner Engineering Corp. Minneapolis, MN USA 114
2/2010 PresencePLUS Software Tools