_base_ = [
    '../_base_/models/retinanet_r50_fpn.py',
    '../_base_/datasets/wider_face.py', '../_base_/schedules/schedule_1x.py',
    '../_base_/default_runtime.py'
]
# model settings
model = dict(bbox_head=dict(num_classes=1))
# optimizer
optim_wrapper = dict(
    optimizer=dict(type='SGD', lr=0.01, momentum=0.9, weight_decay=0.0001))