the frozen_stages in baseline，how to set the value ? How to determine 1 or - 1？

[584669]

model = dict(
type='CascadeRCNN',
num_stages=3,
pretrained='torchvision://resnet50',
backbone=dict(
type='ResNet',
depth=50,
num_stages=4,
out_indices=(0, 1, 2, 3),
frozen_stages=1,
style='pytorch',
dcn=dict(
modulated=False, deformable_groups=1, fallback_on_stride=False),
stage_with_dcn=(False, True, True, True),
),

[cizhenshi]

I used the default setting in mmdetection. According to my experience , frozen the first stage can achieve better results.