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openmw能否先进行彩度识别，再进行灰度识别（需要识别篮球要用模板匹配，但在这之前已经进行了彩度识别）？如何进行识别呢？
img.to_grayscale()就行
https://docs.singtown.com/micropython/zh/latest/openmvcam/library/omv.image.html#image.Image.image.to_grayscale