Fig. 3

Accuracy evaluation of the object detection model YOLOv4. The x-axis indicates epochs and the y-axis indicates loss range. Red text, mAP; blue text, the loss value. Each time the epochs (training cycles) increase, the accuracy is updated and calculated, and the loss value is calculated at the same time. Epochs and loss values are inversely proportional. Below 1,000 epochs, the accuracy was not calculated. This is the mechanism of the object detection model, which means that at least a certain number of epochs must be applied before accuracy is calculated