The next step in the calibration process is to ensure that the dots can be extracted correctly. A blob tool is used for this purpose inside the job.
The parameters that can be set from the left-hand panel are:
The buttons are:
Note that you can zoom in on the image using the mouse scroll wheel if you need to verify that the correct objects are being recognized. In the image below you can clearly see the blob outlines being correctly identified.
The number of parts shown below the buffer is also useful. In this case we know that we are looking at a 15 x 15-dot grid. That means that there should be 225 objects found, and that is confirmed by the data for NumParts. (NumBlobs also includes holes, so in the example below there is one extra blob counted for the light hole inside the central dot).
If the lighting is uneven, it may not be possible to adjust the blob tool correctly and you will need to fix the illumination.
Proceed to the next step.