Image Engineering
Seite
13
von
19
Image analysis
•
Image selection:
Select an image from the list in the "Image data" section (1). The image will
then be visualized in the "Image" section (4) under the "Image" tab. You can zoom into and out of
the image using your mouse wheel. The zoom will be centered around the position of your cursor.
•
Point detection:
Detect the points in the image by pressing the "Detect" button in the "Detection
& analysis" (2) section.
Detection is finished when the progress bar at the bottom of the window (5) reaches 100%. By
pressing "Show Detected Grid" next to the progress bar, you can display a visualization of the
detected/undetected points.
For a successful analysis, detecting all of the points is not necessary.
If auto-detection fails, you can make a manual ROI selection by setting the checkmark in the
"Detection & analysis" section (2). Five preset ROIs will then appear in the visualized image.
The size and position of these ROIs are adjustable by click&drag.
One ROI must be positioned on the 0
th
diffraction order (the brightest point in the center of the
grid). Adjust the ROI size so that it contains only one point.
The four remaining ROIs must be positioned on the four points closest to the 0
th
diffraction order,
Figure 7: Software user interface overview
