Wenglor B50 - Module Localizer

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Smart Camera / Vision-Sensor / 1D-/2D-Code-Scanner / OCR Reader
11.3. Module Localizer
11.3.1. Overview
Objective
Objects can be tracked and reliably detected. The following image processing func-
tions are set up on the basis of this coordinate system.
The localizer module allows for translatory tracking. The coordinate system’s X and
Y positions are adjusted to this end, but not its rotary position.
And thus the localizer is suitable for objects for which rotary position is irrelevant.
Furthermore, an easy to detect feature which stands out from the rest of the image
(especially high-contrast area, special shape, edge or corner) is helpful for success-
ful tracking.
Note: In addition to translatory tracking, rotary tracking is also possible. This can be
set up in the coordinate system module (see section 11.4).
Prerequisites
1. Sensor is correctly connected (see section 5.5)
2. Connection has been established from the sensor to the software (see section
10.1.1)
3. The camera is configured / images are selected (see section 11.3)
Procedure
The module includes a movable teach box with a size of 16 x 16 pixels. This can be
positioned at a reliably detectable area (especially high-contrast area, special shape,
edge or corner) and taught in under settings in the localizer module. Alternatively,
the location in the teach box with the highest contrast can be taught in automatically.
In every recorded image, the area within the specified search box is then detected
which most closely corresponds to the taught in area. The gray-scale values in the
areas serve as a basis for comparison. The coordinate system is aligned to the point
of closest correspondence to the taught in area, and the object is thus translatorally
tracked.
Note: No rotary tracking with rotation of the coordinate system can be executed with
this model. The coordinate system module must be used in order to perform rotary
tracking (see section 11.4).