brightness control algorithm to gain manual control over the LED brightness. Pressing the brightness control
button will toggle the state of the brightness control algorithm to either automatic or freeze.
NOTE:
This feature is intended for advanced users and by default the brightness control should be allowed
to change automatically.
Live Processed Image Preview
The rectangular box on the top shows a grayscale live preview of the processed image seen by the sensor.
The different shades of contrasts seen by the sensor appear as rectangles in the image preview window.
When a region of the web scatters a low amount of light back to the sensor, the region appears black or
dark; while the region that scatters more light appears white or light. The grayscale value corresponds to the
average light intensity within each region.
Selected Feature
The controller can be taught to track a certain feature using one of the contrast modes. During teaching and
after teaching, the selected feature that is being tracked is highlighted by a green bounding box. Depending
on the contrast mode the bounding box may be a rectangle, three sided rectangle or two three sided
rectangles.
NOTE:
If the taught feature is not seen within the sensor window then no bounding boxes will be visible.
This would correspond to no valid contrast condition.
Feature Navigation
The left and right arrow keys can be used to scroll through the live processed image preview to select the
appropriate contrasting feature of interest. Depending on the contrast mode chosen the arrow keys will
move the edge or the line to the left or to the right.
NOTE:
The feature selection key can be used only when the controller is in teaching mode.
Teaching
When the controller is in teaching mode, the gear icon will appear green. The user can press the left and
right feature navigation keys to navigate to the feature of interest. To save the teaching, so that the controller
can follow the feature of interest, the gear icon can be pressed again. Successful teaching and saving of the
feature of interest will turn the gear icon to red and all the contrast mode icons will disappear, except for the
selected contrast mode.
WARNING:
When teaching is saved, the controller will look for the first appearance of the feature of interest
from left to right. If there are two features with the same conditions within the sensor view, the left most
feature would be selected. It is highly recommended to teach on a unique feature in the sensor view to
increase the robustness of the measurement.
Contrast Mode
Four different contrast modes are available for the user to pick when the controller is in teaching mode.
These include right edge of a color (or grayscale), edge created by two colors, the position of a line with a
Content subject to change without notice
SCU5: Sensor and Web Guide Controller User Manual v 3.6| Page 28
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