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auto calibration
The MB-Ruler Pro auto calibration is usefull, if you have a static
measure system; there must be correlation between the zoom factor
of the image and the scale.
Further more, the images must include EXIF
informationen about the name of the camera and the used zoom
factor.
Follow these steps to define the initial auto calibration
graph:
- Use the menu item File /
Monitor Directory ... / Choose Directory to choose the
directory, where the images taken by the camera are stored.
The images will be shown in a horizontal image list at the bottom
of the window. The image list is dynamic - new images in the
monitored directory will apper in the list.
- Activate the auto calibration using the menu item Scale / User Auto Calibration.
- Choose a sheet with squares of defines size and that a serie of
images using different zoom level
- about 10 images - images with the minimal and maximal zoom leve
must be included.
- Handle each image this way:
- Choose each image with a double click
- Handling the first image, you will be asked, if you want to
create a calibration graph depending on the camera, this image was
taken with.
Answer this question with OK.
- Define the scale of the image using the menu item Scale / Definition ... :
- First click on the start of the referenz line and then
- click on the end of the referenz line..
- A window will open, where you can edit the physical lengh of
the distance just measured - on a sheet of paper with squares
normally 5,10,15, .. mm
(The scale unit must be idential for all images)
- Define the scale of each image during the calibration graph-
even if MB-Ruler Pro suggest you an approximated value
- You can display, modify and delete the calibration using the
menu Scale / Calibration
Graph
- Note: If you change your measure enviroment, you have to delete
the old calibration graph and define a new one.
Have a look at the
online flash animation for a demonstration
You have to activate the MB-Ruler Pro
calibration edit mode for changing the calibration values!
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