By fanbingbing, 30 June, 2025 imagej便捷测面积 Forums General discussion 1.将图片导入,设置比例尺,选择一段尺子上的长度,尽量精准小2.选择Analyze-set scale,修改known distance为刚刚选择的已知长度,后修改Unit of length为已知长度的单位