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The particle detection is currently requiring an image acquired in darkfield-mode (bright particles on dark background). The image segmentation is based on a watershed algorithm and is realized mainly using openCV functions and can be controlled using a number of parameters that are exposed to the user interface. Processing a very large image (e.g. 17000 x 17000 px) can take a few minutes, which makes interactive adjustment of the parameters difficult. Therefore, the particle detection window (shown below) displays a small region (1000 x 1000 px) on which the image segmentation takes usually less than a second. **Left-clicking anywhere in the main Window (fullimage) makes the preview window jump to that location. Alternatively, by right-clicking and dragging the mouse in the preview window allows to scroll over the full sample.**
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