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canny on RGB color

hello! I've a simple question. Can I use Canny function directly on RGB image and not on RGB image converted in gray? If it is possible, could you show me one exapmple? thanks you so much for help

canny on RGB color

hello! I've a simple question. Can I use Canny function directly on RGB image and not on RGB image converted in gray? If it is possible, could you show me one exapmple? thanks you so much for help