open cv 作灰階並用滑鼠查看圖形上每點灰 階值,cvThreshold,onMouse cvThreshold(原始圖形IplImage資料結構,計算後結果IplImage資料結構,門檻值,最大門檻值數值,CV_THRESH_BINARY) open cv 作灰阶并用滑鼠查看图形上每点灰阶值,cvThreshold,onMouse cvThreshold(原始图形IplImage资料结构,计算后结果IplImage资料结构,门槛值,最大门槛值数值,CV_THRESH_BINARY)-o