By Chris Walkowicz on Fri, May 13, 2011
Pattern finding is a
necessity in many applications. When you download and install the IMPACT
Software Suite from www.pptvision.com, several sample programs and
corresponding images are included with the Suite that illustrate a range of
possible applications. Here we will look at two programs; real-world examples
of pattern finding.A screen shot of the sample files listed in VPM’s File Manager.
The first sample IMPACT vision program, Sample Pinpoint Verify v01.vp
is used to verify that the proper graphics have been imprinted on a coin. Below
are some images illustrating the IMPACT Pinpoint Pattern Find® tool in action.
First, the tool is trained on a good coin with a clear image of the desired
pattern. This image shows the desired pattern found after the
Pinpoint Pattern Find tool was trained.
Next, the tool is run on images of coins to be inspected to see if they are
imprinted with the desired pattern. This passing image shows that the correct pattern was
found on the coin after the Pinpoint Pattern Find tool ran. Notice that the
pattern was found even though the coin was rotated. This failing image shows that an incomplete pattern was
found on the coin after the Pinpoint Pattern Find tool ran. This failing image shows that an incorrect pattern was found on the coin
after the Pinpoint Pattern Find tool ran.
The second sample program, Sample Pinpoint
PickPlace v01.vp, is used to guide a robotic arm for a pick and place
system. This program looks at an image to see if any of the parts in the image
match the trained image. First, the tool is trained on a good part. Then the
tool is run on images of parts to be inspected. If it finds a passing part, the
X and Y coordinates and the angle of the part are sent to the robotic arm which
performs the desired operation. Below are some images illustrating the pick and
place operation in action.
These images show several passing parts that
were found when the tool ran. The X,Y coordinates and angle of the parts in the
crosshairs are sent to the robotic arm.
Even though the parts in this image are
touching, the tool will classify them as separate parts. BACK
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