In the improved algorithm, the pre-processed image is smoothed and the proper gradient threshold is set to prevent the generationof insignificant regions.
该改进算法在预处理阶段对图像进行平滑操作并设置适当的梯度阈值，即减少了梯度图像中非重要区域的产生。
2
With this method, data collected from the field test were calculated, and the threshold was gained which can be used to determine the generation time of driving fatigue.
运用该方法对现场试验采集的数据进行计算，得到了能够确定驾驶疲劳开始产生时刻的驾驶疲劳度的阈值。
3
Based on the direct benefit and cost, the economic thresholdof the third generation bollworm was calculated to be 35 eggs per 100 plants for all the levels of soil fertility.