mmpretrain/tests/test_models/test_backbones/test_t2t_vit.py

145 lines
5.0 KiB
Python

# Copyright (c) OpenMMLab. All rights reserved.
import math
import os
import tempfile
from copy import deepcopy
from unittest import TestCase
import torch
from mmengine.runner import load_checkpoint, save_checkpoint
from mmpretrain.models.backbones import T2T_ViT
from .utils import timm_resize_pos_embed
class TestT2TViT(TestCase):
def setUp(self):
self.cfg = dict(
img_size=224,
in_channels=3,
embed_dims=384,
t2t_cfg=dict(
token_dims=64,
use_performer=False,
),
num_layers=14,
drop_path_rate=0.1)
def test_structure(self):
# The performer hasn't been implemented
cfg = deepcopy(self.cfg)
cfg['t2t_cfg']['use_performer'] = True
with self.assertRaises(NotImplementedError):
T2T_ViT(**cfg)
# Test out_indices
cfg = deepcopy(self.cfg)
cfg['out_indices'] = {1: 1}
with self.assertRaisesRegex(AssertionError, "get <class 'dict'>"):
T2T_ViT(**cfg)
cfg['out_indices'] = [0, 15]
with self.assertRaisesRegex(AssertionError, 'Invalid out_indices 15'):
T2T_ViT(**cfg)
# Test model structure
cfg = deepcopy(self.cfg)
model = T2T_ViT(**cfg)
self.assertEqual(len(model.encoder), 14)
dpr_inc = 0.1 / (14 - 1)
dpr = 0
for layer in model.encoder:
self.assertEqual(layer.attn.embed_dims, 384)
# The default mlp_ratio is 3
self.assertEqual(layer.ffn.feedforward_channels, 384 * 3)
self.assertAlmostEqual(layer.attn.out_drop.drop_prob, dpr)
self.assertAlmostEqual(layer.ffn.dropout_layer.drop_prob, dpr)
dpr += dpr_inc
def test_init_weights(self):
# test weight init cfg
cfg = deepcopy(self.cfg)
cfg['init_cfg'] = [dict(type='TruncNormal', layer='Linear', std=.02)]
model = T2T_ViT(**cfg)
ori_weight = model.tokens_to_token.project.weight.clone().detach()
model.init_weights()
initialized_weight = model.tokens_to_token.project.weight
self.assertFalse(torch.allclose(ori_weight, initialized_weight))
# test load checkpoint
pretrain_pos_embed = model.pos_embed.clone().detach()
tmpdir = tempfile.gettempdir()
checkpoint = os.path.join(tmpdir, 'test.pth')
save_checkpoint(model.state_dict(), checkpoint)
cfg = deepcopy(self.cfg)
model = T2T_ViT(**cfg)
load_checkpoint(model, checkpoint, strict=True)
self.assertTrue(torch.allclose(model.pos_embed, pretrain_pos_embed))
# test load checkpoint with different img_size
cfg = deepcopy(self.cfg)
cfg['img_size'] = 384
model = T2T_ViT(**cfg)
load_checkpoint(model, checkpoint, strict=True)
resized_pos_embed = timm_resize_pos_embed(pretrain_pos_embed,
model.pos_embed)
self.assertTrue(torch.allclose(model.pos_embed, resized_pos_embed))
os.remove(checkpoint)
def test_forward(self):
imgs = torch.randn(1, 3, 224, 224)
# test with_cls_token=False
cfg = deepcopy(self.cfg)
cfg['with_cls_token'] = False
cfg['out_type'] = 'cls_token'
with self.assertRaisesRegex(ValueError, 'must be True'):
T2T_ViT(**cfg)
cfg = deepcopy(self.cfg)
cfg['with_cls_token'] = False
cfg['out_type'] = 'featmap'
model = T2T_ViT(**cfg)
outs = model(imgs)
self.assertIsInstance(outs, tuple)
self.assertEqual(len(outs), 1)
patch_token = outs[-1]
self.assertEqual(patch_token.shape, (1, 384, 14, 14))
# test with output cls_token
cfg = deepcopy(self.cfg)
model = T2T_ViT(**cfg)
outs = model(imgs)
self.assertIsInstance(outs, tuple)
self.assertEqual(len(outs), 1)
cls_token = outs[-1]
self.assertEqual(cls_token.shape, (1, 384))
# Test forward with multi out indices
cfg = deepcopy(self.cfg)
cfg['out_indices'] = [-3, -2, -1]
model = T2T_ViT(**cfg)
outs = model(imgs)
self.assertIsInstance(outs, tuple)
self.assertEqual(len(outs), 3)
for out in outs:
self.assertEqual(out.shape, (1, 384))
# Test forward with dynamic input size
imgs1 = torch.randn(1, 3, 224, 224)
imgs2 = torch.randn(1, 3, 256, 256)
imgs3 = torch.randn(1, 3, 256, 309)
cfg = deepcopy(self.cfg)
cfg['out_type'] = 'featmap'
model = T2T_ViT(**cfg)
for imgs in [imgs1, imgs2, imgs3]:
outs = model(imgs)
self.assertIsInstance(outs, tuple)
self.assertEqual(len(outs), 1)
patch_token = outs[-1]
expect_feat_shape = (math.ceil(imgs.shape[2] / 16),
math.ceil(imgs.shape[3] / 16))
self.assertEqual(patch_token.shape, (1, 384, *expect_feat_shape))