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Sobel Edge Detection + GUI

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Richard
Bourne
From Sobel Edge Detection + Threshold by Sergio Venancio This is a study of simple kernel filtering. We applied Sobel Edge Detection, according to Computerphile's Finding the Edges (https://www.youtube.com/watch?v=uihBwtPIBxM). We also used a basic threshold filtering for three tones of gray. - Sergio Added a GUI - Richard.
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