Measurement examples

The Measurement example MMeas.cpp demonstrates how to find a stripe in an image and measure its position, width, and angle.

[Image: MeasExample2.png]

This example also demonstrates how to find the average position, average width, and average angle of a row of pins on a chip.

[Image: Example1.png]

In addition, the example shows you how to perform drawing operations and return measurement statistics.

Code example: mmeas.cpp

Circle markers and advanced settings

There are also examples regarding circle markers and advanced measurement settings. These examples illustrate how to handle:

• A simple circle. [Image: MeasurementCircleProcessingExample.png] In this case, a circle is found with default settings.
• A circle with two possible outer edges (circles). [Image: MeasurementCircleProcessingExampleDoubleEdge.png] In this case, only the outermost circle must be measured. To achieve proper results, MmeasSetMarker with M_MAX_ASSOCIATION_DISTANCE (restricts edges) was used.
• A circle that is both incomplete and textured (can detect many edges). [Image: MeasurementCircleProcessingExampleOcclusion.png] In this case, only the main circle must be measured. To achieve proper results, MmeasSetMarker with M_EDGEVALUE_MIN was set above the default (reduces noise) and M_MAX_ASSOCIATION_DISTANCE was given a value (restricts edges).
• Concentric circles. [Image: MeasurementCircleProcessingExampleNumerousCircles.png] In this case, only the inner-most circle must be measured. To achieve proper results, MmeasSetMarker with M_MAX_ASSOCIATION_DISTANCE (restricts edges) was used. Also, the strength score characteristic was removed and a radius score characteristic was set, using MmeasSetScore with M_STRENGTH_SCORE and M_RADIUS_SCORE (locates smallest circle).

To run these examples, use the Aurora Imaging Example Launcher in the Aurora Imaging Control Center.