National Instruments NI myRIO, Справочник по основам

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146 APPENDIX F. VIDEO TUTORIAL LINKS
• Calibrate Stereo Cameras
6
– Calibrate a pair of stereo cameras for use
with the “Calibrate Stereo Vision” example VI included with the NI Vision
installation.
• Measure Depth
7
– Measure depth using a pair of stereo cameras and
the “Calibrate Stereo Vision” example VI included with the NI Vision
installation.
F.3 Coin Caliper I
•
Step 1: Obtain Representative Images
8
– Coin Caliper I Demo Step 1/7:
Optimize the camera contrast, acquire representative images of coins and
of a ruler to be used later for calibration.
•
Step 2: Calibrate the Camera
9
– Coin Caliper I Demo Step 2/7: Create
a “Point-Distance” calibration step in NI Vision Assistant and measure
length in real-world units.
•
Step 3: Develop Vision Script
10
– Coin Caliper I Demo Step 3/7: Develop
the Vision Assistant script to convert the color webcam image to grayscale
and then measure the coin diameter with the “Max Clamp” step; test the
vision script with the representative images collected earlier.
• Step 4: Create LabVIEW Project
11
– Coin Caliper I Demo Step 4/7: Create
a new LabVIEW project for execution on the NI myRIO real-time target,
and then prepare the block diagram.
• Step 5: Configure “Vision Acquisition” Express VI
12
– Coin Caliper I
Demo Step 5/7: Place the “Vision Acquisition” Express VI and ensure
that the camera settings match those used to acquire the representative
images.
•
Step 6: Configure “Vision Assistant” Express VI
13
– Coin Caliper I Demo
Step 6/7: Place the “Vision Assistant” Express VI and insert the vision
script developed earlier.
6
http://youtu.be/bufXESBlzTY
(2:49)
7
http://youtu.be/UXw31LOSiHk
(3:16)
8
http://youtu.be/DMH5Z-J0mcA
(4:21)
9
http://youtu.be/2ycFJJcKbMs
(3:04)
10
http://youtu.be/AO5Kh-VN5sA
(2:59)
11
http://youtu.be/zZ1oLiItM3g
(1:31)
12
http://youtu.be/DmUHugQ6qJM
(3:34)
13
http://youtu.be/_il9DoPwkpM
(4:37)