Eurotherm TC3001, User Manual

Page: 64 / 79

Transit Inspector Pro 65
Appendix C: Camera Calibration Utility
User Guide
Setting panel consists of the following tabs (see figure 37 ):
•
Distortion — nonlinear image transformation (see 9 C.5 Distortion Tab on page 65 );
•
Zoom/Rotation
— linear image transformation (see 9 C.6 Zoom/Rotation Tab on page 67 );
•
Perspective
— linear image transformations (shift, skew, stretch) and perspective elimination
(see 9 C.7 Perspective Tab on page 68 );
•
Points calibration
— by points image transformation (see 9 C.8 Points Calibration Tab on
page 69 ).
To switch between tabs,
click its name.
Note: There are only two tabs displayed on setting panel. To switch to the next, click Tabs List button
(see figure 37 ) and choose the required one.
To avoid distortion:
1. Make some snap-shots of carriages.
2. Launch
Camera Calibration Utility
.
3. Click Open image button and select an archive image of carriage (see item 1 ).
4. Using parameters settings panel (tabs) set calibration parameters. It is recommended to use
image on Transformed tab for visual check of image changes.
5. Click Open image button and select an another archive image of carriage. If necessary, edit
calibration parameters (see item 4 ).
6. Click Save or Save as button on the utility toolbar to save parameters.
C.5 Distortion Tab
The Distortion tab is used to make nonlinear image transformation and defines the following para-
meters:
• Pincushion — pincushion and barrel distortion
• Corners — deskewing corner position
•
Keystone [Y] — deskewing image position on vertical line
•
Keystone [X]
— deskewing image position on horizontal line
• Distortion center X, Y — distortion center coordinates
• Balance — applying defined values to the image width or height
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