6. Test a complete range of good and bad samples to make sure that the sensor accepts good parts and rejects bad parts.
Figure 110. Bad Part—Missing Date/Lot Code
8.4
Blob Tool
Use the Blob tool to detect and count groups of like-colored pixels within the ROI.
A user-selected range of brightness levels
defines
the pixels of interest. Then, the Blob tool merges pixels of interest that touch each
other into groups, called blobs. The Blob tool then counts the number of blobs in the ROI, calculates their size in pixel area, and
defines
each blob’s center of mass
location.
Example
applications:
• Count pills
• Measure hole size
• Verify the number of characters in a date/lot code
• Detect LCD segments
• Detect missing products during packaging
8.4.1 Blob Tool: Input Parameters
Use the Input parameters to
configure
how the tool analyzes an image.
Figure 111. Blob Tool—Input Parameters
ROI
The Region of Interest (ROI) is the
user-defined
group of pixels in the image that the sensor analyzes.
Figure 112. ROI Shape
Selection
VE Series Smart Camera
70
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