How are images calibrated in EXAMINE Pro?
There are three different ways for images to be calibrated in EXAMINE Pro:
Automatically via the module coming from the device
Automatically using values in the calibration table
Manually for a single image
When taking an image within EXAMINE Pro, depending on the x-ray module, the module may automatically detect the calibration. This is only possible if this information is available via the driver or SDK.
If the device doesn't automatically calibrate images, EXAMINE Pro will calibrate using the values in the calibration table, which shows fixed image sizes and the corresponding calibration value (pixels/meter). The values in this table can be adapted.
If the image isn’t already calibrated, you can calibrate it yourself.
How do I calibrate a single image in EXAMINE Pro?
To calibrate a single image:
Using an object you know the measurements for (such as a coin or a paperclip), take an image with the device or import the image into the image library of EXAMINE Pro.
Open the image in a viewport.
Click the 'Annotation' button.
Select the 'Measure' tab.
Select 'Line' and draw a line on the image (the length of the line will be shown in pixels - this is an indication that the image is not calibrated).
Open the 'Calibrate' tab. Enter the known line length of the object.
Click 'Apply'. The line measurement on the image will now change to length in mm (you may need to click on the line for the value to update).
Now this image is calibrated, and you can use the calibration value to measure additional images.
Once you are happy that the calibrations are accurate, you can enter the calibration values into the calibration table. This will then automatically calibrate future images of the same size.
How do I configure the calibration table?
Click 'Options' in the EXAMINE Pro menu, and select 'Calibration Table'.
The calibration table will be displayed.
Click 'Add'.
Enter calibration values you know are correct (if you have manually calibrated an image, use the values in the 'Calibrate' tab of that image).
Click 'Save' and then 'Exit'.
All future uncalibrated images that match the measurements will be automatically calibrated in line with your chosen values.