Chapter 7: Blue-White Picking Processes
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Adjusting the Blue-White Regional White Light Test Image
In the Test Image window, all detected features are viewed as potential colonies to pick for
inoculation of the destination plates. To make sure that only blue or white colonies are
detected, adjust the test image in this window using the Exposure and Gain settings, the
Detection settings, the Display settings, and the Debris settings. Each detected feature displays
within a yellow ring.
To view the pixel intensity values in the image map to manually set a detection threshold or
detect areas of saturation within the image:
1. Right-click over the image map and select Intensity.
2. Move the cursor over the area of interest in the image map to display the pixel intensity
value.
To adjust the test image:
1. From the Receptacle list, select the number of the receptacle to view and then click the
frame to view in the receptacle image below the list. The frame is in red.
2. Under Acquisition, adjust the Exposure and Gain settings.
In the Exposure (ms) field, enter the number of milliseconds (from 1 to 2000) to expose
the sample to light when acquiring the image.
Adjust the Gain to increase the image signal without changing the light exposure.
Tip: Molecular Devices recommends not changing the default Gain setting.
After you adjust the Exposure or Gain settings, click Grab Image to apply the new settings
to the test image.
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