三个Loss分别怎么理解？
Created by: SixGodGG
2020-06-16 16:47:00,744-INFO: epoch: 151, iter: 2420, 'lr': 0.001, 'total_loss': 0.759649, 'loss_shrink_maps': 0.390852, 'loss_threshold_maps': 0.295406, 'loss_binary_maps': 0.077963, time: 0.820
loss_shrink_maps loss_threshold_maps loss_binary_maps 这三个loss，用最通俗易懂的语言怎么理解？