Rockwell Automation 5370-CVIM2 Module - Manual (Page 52)

5 Chapter Chapter 3
Image Acquisition Parameters
3–13
Light Probe Panel
The Light Probe panel, shown in Figure 3.8, contains two fields and two
buttons: The Status field, which enables or disables the light probe tool, and
the Nomina l field performs a “learn” operation, which causes the light probe
tool to acquire a sample or “nominal” luminance reading.
Figure 3.8 Light Probe Panel
Status –– The light probe status is indicated by the Status field in the Light
Probe panel. By default, the status is Disabled .
When you pick the Status field, the status toggles from Disabled to
Enabled , or vice versa, with the following effects:
•
Disabled –– This indicates that the light probe for the associated camera
is inactive, and lighting compensation will not be provided.
•
Enabled –– This means that the light probe for the associated camera is
active, and lighting compensation will be provided.
Nominal –– The nominal value is indicated by the Nominal field in the Light
Probe panel. When you pick the Nominal field, the light probe performs a
“learn” operation, during which it calculates the average luminance of the
pixels in the light probe box and displays the result in the
Nominal field.
The button enables you to position and “size” the light probe box, and
the button exits the light probe setup and returns to the Camera panel.
Light Probe “Tool Type” and Range Limits
Range limits can be selected for a light probe by selecting a Probe tool type
in the toolset edit panel, as shown in Figure 3.9 (page 3–14).
When you pick Probe in the toolset edit panel, the Range panel appears, as
shown in Figure 3.9. Note that the nominal value (from the “learn” operation
described earlier) appears in the
Range panel. Using the nominal value as
the basis for determining the appropriate range limits, select the range limits
as described in Chapter 7, Inspection Tools, on page 7–179.