Hardware manual

Feature Finding Drawer Impact Reference Guide
Datalogic Automation Inc. 3-92
If the Algorithm Type property is set to Correlation, correlation matching is used only for the first stage of
the search. The final placement and scoring is always correlation based. This setting may be useful for pat-
terns that have weak and variable edges or for very small objects. Correlation is inherently slower than edge
matching, especially for searching over large areas or with rotating patterns.
Feature Finding Drawer
Average Gradient
In the Feature Finding Drawer
The Average Gradient tool is used to measure edge point sharpness in the region of interest (ROI). The
larger the Average Gradient Result, the more sharply the image edge is focused.
Average Intensity
In the Feature Finding Drawer
The Average Intensity tool calculates the average grey level intensity of pixels in one or more ROIs, calcu-
lates whether that intensity is within a user-specified tolerance, then passes or fails each ROI, and the tool,
based on that calculation. A Setup is available for this tool, which simplifies basic configuration. See “How
to set up the Average Intensity tool” on page 3-94.
Input Name What it is
Input Image The image being inspected
Tool Origin The tool’s origin relative to the entire image space
Shape List The desired region of the image to search. If no shape is defined, the
entire image is processed.
Percent of Stron-
gest Edgels
The number of edge transitions that should be averaged into the result.
A lower number includes fewer edges.
Output Name What it is
Average Gradient
Result
Grey level gradient in the ROI (in percentage)
Input Name What it is
Input Image The image being inspected
Tool Origin The tool’s origin relative to the entire image space
Shape List The desired regions of the image to search. If no shapes are defined, the
entire image is processed.