Hardware manual

Impact Reference Guide Threshold Viewer
6-3 Datalogic Automation Inc.
Histogram Plot
The Histogram plot is displayed as a bar chart where each vertical bar represents the greyscale intensity of a
pixel in the image. The Y-Axis is the scale for the number of pixels of each intensity. The X-Axis shows the
range of grey levels for the pixels from zero percent (black) to 100 percent (white).
Greyscale %
The minimum and maximum grey levels, as shown graphically in the plot, are displayed here as numbers.
Threshold (%)
The Histogram window displays the selected tool’s or image’s current property values and new values are
updated in the tool as they are changed in the window.
The movable vertical red cursors (lines) let you set the tool’s desired threshold range on the Histogram. The
current red cursor locations are displayed in the window as Threshold (%) Minimum and Maximum.
The movable vertical green cursor is always positioned at the middle of the threshold range. You can move
the entire range (both red cursors) by moving the green line.
When you move the red cursors, the new minimum and maximum threshold values are written to the entry
fields and are sent to the corresponding tool properties when the adjustment stops. The image display is also
updated. If you are currently using the tool setup, the tool will run after the values are updated.
When you change the values in the minimum entry fields, the red and green vertical cursors are adjusted, the
values are sent to the corresponding tool properties, and the image display is updated. If you are currently
using the tool setup, the tool will run after the values are updated.
NOTE: If the Histogram window is displayed and the current tool, task, or system object (e.g. camera or file
camera) does NOT have Threshold options, the Minimum and Maximum Threshold (%) values are set to 25
and 75. Adjusting these values will adjust the Pseudocolor in the image display, but no values are written to
the tool, task, or system object's properties.
In Range Pixels, Total Pixels, and In Range Percent (%)
In Range Pixels: The number of pixels within the threshold range (between the red vertical cursors).
Total Pixels: The number of pixels in the entire image.
In Range Percent: The percentage of pixels in the entire image with a grey level that fall between the red cur-
sors (In Range Pixels / Total Pixels * 100).
Pseudocolor
When Pseudocolor is turned on, pixels in the image with a greyscale intensity that falls within the threshold
range are colored. The vertical plot lines in the Histogram are also colored. To select the color, click the
Color Selection button.
Color Selection
This button displays the current Pseudocolor color. Click this button select the color from a color palette.
Each camera stores its own Pseudocolor.
Copy to Clipboard
Click this button to create a comma-delimited string of pixel values and write it to the system clipboard. You
can paste this information into other applications such as Notepad or Excel.