The relationship between actual seedling height and height seedling of the maize imageis y = 0.974lx-0.8808, r=0.9936, n=223. The absolute error of the result is less than 1.4mm and the relative error is smaller than 3. 6%.

• 实测苗高(y；mm)与玉米苗幅高(x；mm)呈线性正相关关系:(?) =0.；974lx-0