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258     Bu il d  Y o ur  O w n  Q u a d c o p t e r






























                             Figure 9.40  Test image of bicycle after Canny edge detection.

                                This image has been significantly resized to match the economy image. I applied the
                             outline edge detector first, as I had done in the first test. Figure 9.43 is the result of this
                             outline-edge-detector post processing. This time you can easily see the tire outlines and even
                             the outlines of the handlebar and seat—a definite improvement over the previous outline
                             edge test.





























                             Figure 9.41  Test image of bicycle after adjustment of Canny edge detection.
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