User guide

17-1

17. Colony Counting

You can use Quantity One to automatically count the number of white, blue,

or plaque colonies in a Petri dish image.

Note: For best results, when capturing the image of a Petri dish with an imaging

device, the dish should ﬁll the imaging window. Also, images with

colonies should not have asymmetric pixels. (Asymmetric pixels can be

generated by densitometers and the Reduce File Size command.) The

colony counting function will not work properly on images with

asymmetric pixels.

Select Colony Counting from the Analysis menu to open the Colony

Counting control panel.