Hardware manual

Blob Impact Reference Guide
Datalogic Automation Inc. 3-68
Grey Level Threshold Types
Autothreshold Contrasting Bright Pixels
This sets the upper and lower thresholds automatically based on all the grey levels in the ROI. The lower
threshold is set to a value somewhere in the valley between the bright pixel and the dark pixel peaks. The
exact value depends on the statistics of the two peaks. The upper threshold is set to 100%. Bright pixels are
Output Origin Type Also see “Output Origin” on page 3-70
Centroid X, Y Only: The X and Y coordinates of the blob centroid (the
angle is ignored)
Centroid X, Y and Major Axis Angle: The X and Y coordinates of the
blob centroid and Major Axis angle in a +/- 90 degree range (useful if
blob has an oblong shape).
No Origin: No origin is presented (tool runs faster)
Centroid X, Y, and Major Axis Angle 360 Range: The X and Y coordi-
nates of the blob centroid and Major Axis angle in a 360 degree range
Filter Single Blob This filter is applied after all the other filters
Off: Blobs are filtered and output according to all filter settings
Centermost Blob: Only the blob closest to the center of each ROI is out-
put
First Blob: The tool will stop processing when the first blob is found that
has an area equal to or larger than the Area Range: Minimum value.
(The Width Filter, Height Filter, and Area Range: Maximum filter settings
are ignored. Exclude Border Blobs and Fill Blobs are forced to false to
save processing time.)
Largest Blob: Only the largest blob in each ROI is output
Note: If Centermost or Largest blob is selected, only passed blobs will be
displayed in the image window.
Output Name What it is
Number of Blobs
Found
The number of blobs found
Output Blob List List of filtered blobs
Output Area List List of the areas of the filtered blobs
Output Centroid List List of the X and Y coordinates of the centroid points of the filtered blobs
Passed If true, the number of blobs in the Output Blob List falls within the range
of the Required Number of Blobs
Threshold Range
Used
The Fixed Threshold Range input value start and end.
Output Origin Rela-
tive to Tool
The found origin (including angle if selected) relative to the Tool Origin,
based on filtered blobs. See “Output Origin” on page 3-70
Output Origin Rela-
tive To RWC
The found origin (including angle if selected) relative to the entire image
space, based on filtered blobs. See “Output Origin” on page 3-70
Input Name What it is