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ssdnerf_cars3v_uncond_1m.py
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ssdnerf_cars3v_uncond_1m.py
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name = 'ssdnerf_cars3v_uncond'
model = dict(
type='DiffusionNeRF',
code_size=(3, 6, 128, 128),
code_reshape=(18, 128, 128),
code_activation=dict(
type='TanhCode',
scale=2),
grid_size=64,
diffusion=dict(
type='GaussianDiffusion',
num_timesteps=1000,
betas_cfg=dict(type='linear'),
denoising=dict(
type='DenoisingUnetMod',
image_size=128, # size of triplanes (not images)
in_channels=18,
base_channels=128,
channels_cfg=[1, 2, 2, 4, 4],
resblocks_per_downsample=2,
dropout=0.0,
use_scale_shift_norm=True,
downsample_conv=True,
upsample_conv=True,
num_heads=4,
attention_res=[32, 16, 8]),
timestep_sampler=dict(
type='SNRWeightedTimeStepSampler',
power=0.5), # ω (SNR power)
ddpm_loss=dict(
type='DDPMMSELossMod',
rescale_mode='timestep_weight',
log_cfgs=dict(
type='quartile', prefix_name='loss_mse', total_timesteps=1000),
data_info=dict(pred='v_t_pred', target='v_t'),
weight_scale=4.0, # c_diff (diffusion weight constant)
scale_norm=True)),
decoder=dict(
type='TriPlaneDecoder',
interp_mode='bilinear',
base_layers=[6 * 3, 64],
density_layers=[64, 1],
color_layers=[64, 3],
use_dir_enc=True,
dir_layers=[16, 64],
activation='silu',
sigma_activation='trunc_exp',
sigmoid_saturation=0.001,
max_steps=256),
decoder_use_ema=True,
freeze_decoder=False,
bg_color=1,
pixel_loss=dict(
type='MSELoss',
loss_weight=20.0), # (0.5 * 2^14) * c_rend (rendering weight constant)
reg_loss=dict(
type='RegLoss',
power=2,
loss_weight=3e-3),
cache_size=2458) # number of training scenes
save_interval = 5000
eval_interval = 20000
code_dir = 'cache/' + name + '/code'
work_dir = 'work_dirs/' + name
train_cfg = dict(
dt_gamma_scale=0.5,
density_thresh=0.1,
extra_scene_step=15, # -1 + K_in (inner loop iterations)
n_inverse_rays=2 ** 12, # ray batch size
n_decoder_rays=2 ** 12, # ray batch size (used in the final inner iteration that updates the decoder)
loss_coef=0.1 / (128 * 128), # 0.1: the exponent in the λ_rend equation; 128 x 128: number of rays per view (image size)
optimizer=dict(type='Adam', lr=5e-3, weight_decay=0.),
cache_load_from=code_dir,
viz_dir=None)
test_cfg = dict(
img_size=(128, 128), # size of rendered images
num_timesteps=50, # DDIM steps
clip_range=[-2, 2],
density_thresh=0.1,
# max_render_rays=16 * 128 * 128, # uncomment this line to use less rendering memory
)
optimizer = dict(
diffusion=dict(type='Adam', lr=1e-4, weight_decay=0.),
decoder=dict(type='Adam', lr=1e-3, weight_decay=0.))
dataset_type = 'ShapeNetSRN'
data = dict(
samples_per_gpu=8,
workers_per_gpu=4,
train=dict(
type=dataset_type,
data_prefix='data/shapenet/cars_train',
num_train_imgs=3,
load_test_data=False,
cache_path='data/shapenet/cars_train_cache.pkl'),
val_uncond=dict(
type=dataset_type,
data_prefix='data/shapenet/cars_test',
load_imgs=False,
num_test_imgs=251,
scene_id_as_name=True,
cache_path='data/shapenet/cars_test_cache.pkl'),
val_cond=dict(
type=dataset_type,
data_prefix='data/shapenet/cars_test',
specific_observation_idcs=[64],
cache_path='data/shapenet/cars_test_cache.pkl'),
train_dataloader=dict(split_data=True))
lr_config = dict( # decay schedule of diffusion & decoder lr
policy='step',
warmup='linear',
warmup_iters=500,
warmup_ratio=0.001,
gamma=0.5,
step=[500000])
checkpoint_config = dict(interval=save_interval, by_epoch=False, max_keep_ckpts=2)
evaluation = [
dict(
type='GenerativeEvalHook3D',
data='val_uncond',
interval=eval_interval,
feed_batch_size=32,
viz_step=32,
metrics=dict(
type='FIDKID',
num_images=704 * 251,
inception_pkl='work_dirs/cache/cars_test_inception_stylegan.pkl',
inception_args=dict(
type='StyleGAN',
inception_path='work_dirs/cache/inception-2015-12-05.pt'),
bgr2rgb=False),
viz_dir=work_dir + '/viz_uncond',
save_best_ckpt=False)]
total_iters = 1000000 # K_out (outer loop iterations)
log_config = dict(
interval=50,
hooks=[
dict(type='TextLoggerHook'),
dict(type='TensorboardLoggerHook'),
])
# yapf:enable
custom_hooks = [
dict(
type='ExponentialMovingAverageHook',
module_keys=('diffusion_ema', 'decoder_ema'),
interp_mode='lerp',
interval=1,
start_iter=0,
momentum_policy='rampup',
momentum_cfg=dict(
ema_kimg=4, ema_rampup=0.05, batch_size=16, eps=1e-8),
priority='VERY_HIGH'),
dict(
type='SaveCacheHook',
interval=save_interval,
by_epoch=False,
out_dir=code_dir,
viz_dir='cache/' + name + '/viz'),
dict(
type='ModelUpdaterHook',
step=[2000, 100000, 500000],
cfgs=[{'train_cfg.extra_scene_step': 1}, # decay schedule of K_in & triplane lr
{'train_cfg.extra_scene_step': 1,
'diffusion.ddpm_loss.freeze_norm': True},
{'train_cfg.extra_scene_step': 1,
'train_cfg.optimizer.lr': 2.5e-3,
'diffusion.ddpm_loss.freeze_norm': True,
'pixel_loss.loss_weight': 10.0,
'reg_loss.loss_weight': 1.5e-3}],
by_epoch=False)
]
runner = dict(
type='DynamicIterBasedRunner',
is_dynamic_ddp=False,
pass_training_status=True)
dist_params = dict(backend='nccl')
log_level = 'INFO'
load_from = None
resume_from = None
workflow = [('train', save_interval)]
use_ddp_wrapper = True
find_unused_parameters = False
cudnn_benchmark = True
opencv_num_threads = 0
mp_start_method = 'fork'