Fig. 7From: A method to calculate the number of wheat seedlings in the 1st to the 3rd leaf growth stagesEstimation of the number of wheat seedlings with different leaf ages and densities using the coverage degree. The datasets are these images for model training (720 observations), and each treatment has 60 data. The densities of images from the first line to the fourthly are 75 × 104 plants ha−1, 150 × 104 plants ha−1, 225 × 104 plants ha−1, 300 × 104 plants ha−1Back to article page