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2.8mm-12mm的变焦镜头怎么知道当前的焦距是多少呢？
@kidswong999 我使用25mm的镜头，目前测试有80m的距离。
@dagb 像素坐标系到相机坐标系的变换，需要相机的内参矩阵。
OpenMV识别直径3m的圆形靶标，有效距离大概是多少？