Hardware manual

Average Intensity Impact Reference Guide
Datalogic Automation Inc. 3-94
How to set up the Average Intensity tool
Tool setup is easier when you use the tool’s setup.
1. Click the Setup tab, then click the ROI & Pass/Fail radio button.
2. Position one or more ROIs over the area of the image you want to inspect. If you want to calculate the
average intensity of the entire image, delete any existing ROIs.
3. Select the Tolerance Type you want to use.
Use Uniform Tolerance: Use this when there is one ROI or all ROIs are expected to have the same
intensity, or there are no ROIs and you want to calculate the average intensity of the entire image.
Use Nominal Intensity List and +- tolerances: Use this when each ROI is expected to have a different
intensity, but you want Plus and Minus Tolerances that apply to all ROIs, even as you add them
Use Tolerance List: Use this when you want to set the plus and minus tolerance of each ROI separately
4. Click the Train button. This generates a list of the ROIs and their average intensity values, along with
Minus, Plus, and Nominal values in the ROI Results table. If you have any ROIs selected, only those
ROI values may be recalculated, depending on the Tolerance type.
5. Adjust the ROIs position and size, if necessary. Each time you adjust an ROI, the tool runs and recalcu-
lates the results.
6. Depending on the Tolerance Type you chose, adjust the Minus, Plus, and Nominal values, if necessary.
To adjust a value, select the desired table row, then enter the values as follows:
Use Uniform Tolerance: adjust values in the Tolerances box fields
Use Nominal Intensity List and +- tolerances: adjust the Nominal value in the table Nominal cell,
adjust the Minus and Plus values in the Tolerances box Minus and Plus fields
Use Tolerance List: adjust all values in the Tolerances box or in the table cell
Tip: To select multiple rows, hold down the Ctrl key while you select a table row.
When you change a value, the tool runs and recalculates the results.
Output Name What it is
Average Intensity
Result
Average grey level intensity of all pixels in all ROIs
Intensity Difference The positive or negative difference between the Average Intensity Result
and the Uniform Tolerance nominal value, regardless of the Tolerance
type
Intensity Offset Out-
put
The negative value of Intensity Difference. This value can be linked to
the Intensity Offset input property of another Average Intensity tool to off-
set light level changes.
Average Intensity
List
The calculated Average Intensity of the ROIs
Intensity Difference
List
A list of the positive or negative differences between the measured inten-
sity and the Tolerance nominal value for each ROI
Passed If True, all the ROIs were within tolerance and no error occurred.
Passed List The Pass or Fail result of each ROI.
Number of Fails The number of ROIs that failed.