Box 1. Steps of the Faster R-CNN technique.

The Faster R-CNN technique:
Step 1:	To acquire a feature map, the entire image of rice diseases is fed into CNN
Step 2:	To gain the feature information of the candidate frame and the convolution feature is then fed into the RPN
Step 3:	To recognize whether the features of rice diseases from the candidate box belongs to a specific disease category and then classify
Step 4:	To adjust the disease location again by a regression device for the candidate frame belonging to a specific disease feature