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如图所示，想要用openmv只能识别这个白色小球，但由于别的浅色物体的干扰导致识别不准确，已知阈值无法继续调整。现在想到了一种办法，就是在固定高度识别到小球的像素，且大于这个像素的其他物品都会被筛除掉，获取这个小球的具体像素应该调用哪种函数？
可以试试限定ROI区域
解决了，谢谢
