Chapter 7: Blue-White Picking Processes
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5. To use Auto Select, click either Blue or White. Click the button as many times as required
intensify the target colonies. Generally, two or three clicks get you the optimal value. Click
Reset to restore the previous intensity settings.
6. Select the Display tab.
7. Select the method to view the detected colonies in the image.
Click Image Only to display the detected colonies in white with yellow rings and a gray
background.
Click Image and Overlay to display the detected colonies in green with yellow rings
and a gray background.
Click Overlay only to display the detected colonies in white with yellow rings and a
black background.
To remove the yellow ring from the detected colonies, clear the Outline Detected Features
check box.
8. Select the Debris tab.
9. Adjust the Diameter and Axis Ratio to exclude objects that are smaller than the desired
colonies. Each detected feature displays within a yellow ring while excluded features do not
have a yellow ring.
In the Diameter (mm) field enter a value in millimeters for the minimum diameter of the
required colonies.
In the Axis Ratio field, define the minimum roundness ratio of the required colonies.
The Features Found field displays the number of objects detected as colonies. The value
changes as you make adjustments.
Note: Further refinement for colony detection can be done on a higher-resolution
image in the Feature Selection window.
10. Click Next to go to the next step.
Summary of Contents for QPix 450
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