The Magic Wand tool is the starting point for object editing or identifying a handful of significant objects from a larger selection of objects with similar object features. While all the manual object drawing tools are driven by the pure skill of the user, some objects can be identified more quickly using the Magic Wand tool. Only its visual interpretation defines the size and shape of the object.

  1. The Magic Wand tool must be selected.
  1. Position the mouse cursor over the structure of interest.
  2. All the pixels having the same intensity (plus/minus the tolerance) of the pixel below the cursor will be highlighted. NOTE: Changing the target position, the object preview will also change.
  3. Adjust the tolerance value, if the object preview is underestimated or overestimated.

The tolerance sets the intensity percentage range that is located around the focused pixel accordingly to the following settings (the selection is added to the object):

  • All pixels with the same intensity value - tolerance and higher are selected.
  • All pixels with the same intensity value + tolerance and lower are selected.
  • All pixels with the same intensity value ± tolerance are selected.

This means that in the case of a user looking for bright objects with a tolerance of 50, if the user were to click with a pixel with an intensity of 128, the object would include all pixels within the region with an intensity of 78 or more.

The magic wand can be set up to work on all channels of a multichannel image, or on individual channels as needed by using the Channel Visibility panel.