timm/models/tpmlp.py

import torch
import torch.nn as nn
import torch.nn.functional as F
import torch.utils.checkpoint as checkpoint

from timm.data import IMAGENET_DEFAULT_MEAN, IMAGENET_DEFAULT_STD
from timm.models.helpers import load_pretrained
from timm.models.layers import DropPath, to_2tuple, trunc_normal_
from timm.models.registry import register_model

from einops import rearrange
from einops.layers.torch import Rearrange
from einops._torch_specific import allow_ops_in_compiled_graph  # requires einops>=0.6.1
allow_ops_in_compiled_graph()


def _cfg(url='', **kwargs):
    return {
        'url': url,
        'num_classes': 1000, 'input_size': (3, 224, 224), 'pool_size': None,
        'crop_pct': .9, 'interpolation': 'bicubic',
        'mean': IMAGENET_DEFAULT_MEAN, 'std': IMAGENET_DEFAULT_STD, 'classifier': 'head',
        **kwargs
    }


class Mlp(nn.Module):
    def __init__(self, in_features, hidden_features=None, out_features=None, act_layer=nn.GELU, drop=0.):
        super().__init__()
        out_features = out_features or in_features
        hidden_features = hidden_features or in_features
        self.fc1 = nn.Linear(in_features, hidden_features)
        self.act = act_layer()
        self.fc2 = nn.Linear(hidden_features, out_features)
        self.drop = nn.Dropout(drop)

    def forward(self, x):
        x = self.fc1(x)
        x = self.act(x)
        x = self.drop(x)
        x = self.fc2(x)
        x = self.drop(x)
        return x


class Attention(nn.Module):
    r""" Multi-head self attention module with dynamic position bias.

    Args:
        dim (int): Number of input channels.
        group_size (tuple[int]): The height and width of the group.
        num_heads (int): Number of attention heads.
        qkv_bias (bool, optional):  If True, add a learnable bias to query, key, value. Default: True
        qk_scale (float | None, optional): Override default qk scale of head_dim ** -0.5 if set
        attn_drop (float, optional): Dropout ratio of attention weight. Default: 0.0
        proj_drop (float, optional): Dropout ratio of output. Default: 0.0
    """

    def __init__(self, seq_len, dim, group_size, num_heads, qkv_bias=True, qk_scale=None, attn_drop=0., proj_drop=0.,
                 reduced_dim=2):

        super().__init__()
        self.dim = dim
        self.group_size = group_size  # Wh, Ww
        self.num_heads = num_heads
        self.reduced_dim = reduced_dim
        
        self.to_u = nn.Linear(dim, dim, bias=qkv_bias)
        self.to_v = nn.Linear(dim, num_heads * reduced_dim)
        
        self.weight = nn.Parameter(torch.empty(num_heads, seq_len * reduced_dim, seq_len * reduced_dim))
        trunc_normal_(self.weight, std=.02)
        self.bias = nn.Parameter(torch.zeros(num_heads, seq_len * reduced_dim))
        
        self.v_proj = nn.Linear(num_heads *  reduced_dim, dim); self.v_proj.seq_len = seq_len; self.v_proj.stable=True
        
        self.attn_drop = nn.Dropout(attn_drop)
        self.proj = nn.Linear(dim, dim)
        self.proj_drop = nn.Dropout(proj_drop)

    def forward(self, x):
        """
        Args:
            x: input features with shape of (num_groups*B, N, C)
        """
        B_, N, C = x.shape
        
        u, v = self.to_u(x), self.to_v(x)
        
        # x = x.reshape(B, L, self.num_head, C//self.num_head).permute(0, 2, 3, 1)
        # x = torch.matmul(x, weights)
        # x: b m c//m, L
        # weight: (b, m, L, L)
        v = torch.matmul(rearrange(v, "b n (m d) -> b m () (n d)", m=self.num_heads, d=self.reduced_dim),
                         self.weight).squeeze(2) + self.bias
        v = rearrange(v, "b m (n d) -> b n (m d)", n=N)
        v = self.v_proj(v)
        
        x = u * v
        x = self.attn_drop(x)

        # x = (attn @ v).transpose(1, 2).reshape(B_, N, C)
        x = self.proj(x)
        x = self.proj_drop(x)
        
        return x

    def extra_repr(self) -> str:
        return f'dim={self.dim}, group_size={self.group_size}, num_heads={self.num_heads}'

    def flops(self, N):
        # calculate flops for 1 group with token length of N
        flops = 0
        # to_u, to_v
        flops += N * self.dim * self.dim
        flops += N * self.dim * (self.num_heads * self.reduced_dim)
        # weight
        flops += self.num_heads * (N * self.reduced_dim) * (N * self.reduced_dim)
        # v_proj
        flops += N * (self.num_heads * self.reduced_dim) * self.dim
        # u * v
        flops += N * self.dim
        # proj
        flops += N * self.dim * self.dim
        return flops


class CrossFormerBlock(nn.Module):
    r""" CrossFormer Block.

    Args:
        dim (int): Number of input channels.
        input_resolution (tuple[int]): Input resulotion.
        num_heads (int): Number of attention heads.
        group_size (int): Group size.
        lsda_flag (int): use SDA or LDA, 0 for SDA and 1 for LDA.
        mlp_ratio (float): Ratio of mlp hidden dim to embedding dim.
        qkv_bias (bool, optional): If True, add a learnable bias to query, key, value. Default: True
        qk_scale (float | None, optional): Override default qk scale of head_dim ** -0.5 if set.
        drop (float, optional): Dropout rate. Default: 0.0
        attn_drop (float, optional): Attention dropout rate. Default: 0.0
        drop_path (float, optional): Stochastic depth rate. Default: 0.0
        act_layer (nn.Module, optional): Activation layer. Default: nn.GELU
        norm_layer (nn.Module, optional): Normalization layer.  Default: nn.LayerNorm
    """

    def __init__(self, dim, input_resolution, num_heads, group_size=7, lsda_flag=0,
                 mlp_ratio=4., qkv_bias=True, qk_scale=None, drop=0., attn_drop=0., drop_path=0.,
                 act_layer=nn.GELU, norm_layer=nn.LayerNorm, num_patch_size=1, reduced_dim=2):
        super().__init__()
        self.dim = dim
        self.input_resolution = input_resolution
        self.num_heads = num_heads
        self.group_size = group_size
        self.lsda_flag = lsda_flag
        self.mlp_ratio = mlp_ratio
        self.num_patch_size = num_patch_size
        if min(self.input_resolution) <= self.group_size:
            # if group size is larger than input resolution, we don't partition groups
            self.lsda_flag = 0
            self.group_size = min(self.input_resolution)

        self.norm1 = norm_layer(dim)

        self.attn = Attention(
            seq_len=self.group_size ** 2, dim=dim, group_size=to_2tuple(self.group_size), 
            num_heads=num_heads, qkv_bias=qkv_bias, qk_scale=qk_scale, attn_drop=attn_drop, 
            proj_drop=drop, reduced_dim=reduced_dim)

        self.drop_path = DropPath(drop_path) if drop_path > 0. else nn.Identity()
        self.norm2 = norm_layer(dim)
        mlp_hidden_dim = int(dim * mlp_ratio)
        self.mlp = Mlp(in_features=dim, hidden_features=mlp_hidden_dim, act_layer=act_layer, drop=drop)


    def forward(self, x):
        H, W = self.input_resolution
        B, L, C = x.shape
        assert L == H * W, "input feature has wrong size %d, %d, %d" % (L, H, W)

        shortcut = x
        x = self.norm1(x)
        x = x.view(B, H, W, C)

        # group embeddings
        G = self.group_size
        if self.lsda_flag == 0: # 0 for SDA
            x = x.reshape(B, H // G, G, W // G, G, C).permute(0, 1, 3, 2, 4, 5)
        else: # 1 for LDA
            x = x.reshape(B, G, H // G, G, W // G, C).permute(0, 2, 4, 1, 3, 5)
        x = x.reshape(B * H * W // G**2, G**2, C)

        # multi-head self-attention
        x = self.attn(x)  # nW*B, G*G, C

        # ungroup embeddings
        x = x.reshape(B, H // G, W // G, G, G, C)
        if self.lsda_flag == 0:
            x = x.permute(0, 1, 3, 2, 4, 5).reshape(B, H, W, C)
        else:
            x = x.permute(0, 3, 1, 4, 2, 5).reshape(B, H, W, C)
        x = x.view(B, H * W, C)

        # FFN
        x = shortcut + self.drop_path(x)
        x = x + self.drop_path(self.mlp(self.norm2(x)))

        return x

    def extra_repr(self) -> str:
        return f"dim={self.dim}, input_resolution={self.input_resolution}, num_heads={self.num_heads}, " \
               f"group_size={self.group_size}, lsda_flag={self.lsda_flag}, mlp_ratio={self.mlp_ratio}"

    def flops(self):
        flops = 0
        H, W = self.input_resolution
        # norm1
        flops += self.dim * H * W
        # LSDA
        nW = H * W / self.group_size / self.group_size
        flops += nW * self.attn.flops(self.group_size * self.group_size)
        # mlp
        flops += 2 * H * W * self.dim * self.dim * self.mlp_ratio
        # norm2
        flops += self.dim * H * W
        return flops

class PatchMerging(nn.Module):
    r""" Patch Merging Layer.

    Args:
        input_resolution (tuple[int]): Resolution of input feature.
        dim (int): Number of input channels.
        norm_layer (nn.Module, optional): Normalization layer.  Default: nn.LayerNorm
    """

    def __init__(self, input_resolution, dim, norm_layer=nn.LayerNorm, patch_size=[2], num_input_patch_size=1):
        super().__init__()
        self.input_resolution = input_resolution
        self.dim = dim
        self.reductions = nn.ModuleList()
        self.patch_size = patch_size
        self.norm = norm_layer(dim)

        for i, ps in enumerate(patch_size):
            if i == len(patch_size) - 1:
                out_dim = 2 * dim // 2 ** i
            else:
                out_dim = 2 * dim // 2 ** (i + 1)
            stride = 2
            padding = (ps - stride) // 2
            self.reductions.append(nn.Conv2d(dim, out_dim, kernel_size=ps, 
                                                stride=stride, padding=padding))

    def forward(self, x):
        """
        x: B, H*W, C
        """
        H, W = self.input_resolution
        B, L, C = x.shape
        assert L == H * W, "input feature has wrong size"
        assert H % 2 == 0 and W % 2 == 0, f"x size ({H}*{W}) are not even."

        x = self.norm(x)
        x = x.view(B, H, W, C).permute(0, 3, 1, 2)

        xs = []
        for i in range(len(self.reductions)):
            tmp_x = self.reductions[i](x).flatten(2).transpose(1, 2)
            xs.append(tmp_x)
        x = torch.cat(xs, dim=2)
        return x

    def extra_repr(self) -> str:
        return f"input_resolution={self.input_resolution}, dim={self.dim}"

    def flops(self):
        H, W = self.input_resolution
        flops = H * W * self.dim
        for i, ps in enumerate(self.patch_size):
            if i == len(self.patch_size) - 1:
                out_dim = 2 * self.dim // 2 ** i
            else:
                out_dim = 2 * self.dim // 2 ** (i + 1)
            flops += (H // 2) * (W // 2) * ps * ps * out_dim * self.dim
        return flops


class Stage(nn.Module):
    """ CrossFormer blocks for one stage.

    Args:
        dim (int): Number of input channels.
        input_resolution (tuple[int]): Input resolution.
        depth (int): Number of blocks.
        num_heads (int): Number of attention heads.
        group_size (int): variable G in the paper, one group has GxG embeddings
        mlp_ratio (float): Ratio of mlp hidden dim to embedding dim.
        qkv_bias (bool, optional): If True, add a learnable bias to query, key, value. Default: True
        qk_scale (float | None, optional): Override default qk scale of head_dim ** -0.5 if set.
        drop (float, optional): Dropout rate. Default: 0.0
        attn_drop (float, optional): Attention dropout rate. Default: 0.0
        drop_path (float | tuple[float], optional): Stochastic depth rate. Default: 0.0
        norm_layer (nn.Module, optional): Normalization layer. Default: nn.LayerNorm
        downsample (nn.Module | None, optional): Downsample layer at the end of the layer. Default: None
        use_checkpoint (bool): Whether to use checkpointing to save memory. Default: False.
    """

    def __init__(self, dim, input_resolution, depth, num_heads, group_size,
                 mlp_ratio=4., qkv_bias=True, qk_scale=None, drop=0., attn_drop=0.,
                 drop_path=0., norm_layer=nn.LayerNorm, downsample=None, use_checkpoint=False,
                 patch_size_end=[4], num_patch_size=None, reduced_dim=2):

        super().__init__()
        self.dim = dim
        self.input_resolution = input_resolution
        self.depth = depth
        self.use_checkpoint = use_checkpoint

        # build blocks
        self.blocks = nn.ModuleList()
        for i in range(depth):
            lsda_flag = 0 if (i % 2 == 0) else 1
            self.blocks.append(CrossFormerBlock(dim=dim, input_resolution=input_resolution,
                                 num_heads=num_heads, group_size=group_size,
                                 lsda_flag=lsda_flag,
                                 mlp_ratio=mlp_ratio,
                                 qkv_bias=qkv_bias, qk_scale=qk_scale,
                                 drop=drop, attn_drop=attn_drop,
                                 drop_path=drop_path[i] if isinstance(drop_path, list) else drop_path,
                                 norm_layer=norm_layer,
                                 num_patch_size=num_patch_size,
                                 reduced_dim=reduced_dim))

        # patch merging layer
        if downsample is not None:
            self.downsample = downsample(input_resolution, dim=dim, norm_layer=norm_layer, 
                                         patch_size=patch_size_end, num_input_patch_size=num_patch_size)
        else:
            self.downsample = None

    def forward(self, x):
        for blk in self.blocks:
            if self.use_checkpoint:
                x = checkpoint.checkpoint(blk, x)
            else:
                x = blk(x)
        if self.downsample is not None:
            x = self.downsample(x)
        return x

    def extra_repr(self) -> str:
        return f"dim={self.dim}, input_resolution={self.input_resolution}, depth={self.depth}"

    def flops(self):
        flops = 0
        for blk in self.blocks:
            flops += blk.flops()
        if self.downsample is not None:
            flops += self.downsample.flops()
        return flops


class PatchEmbed(nn.Module):
    r""" Image to Patch Embedding

    Args:
        img_size (int): Image size.  Default: 224.
        patch_size (int): Patch token size. Default: [4].
        in_chans (int): Number of input image channels. Default: 3.
        embed_dim (int): Number of linear projection output channels. Default: 96.
        norm_layer (nn.Module, optional): Normalization layer. Default: None
    """

    def __init__(self, img_size=224, patch_size=[4], in_chans=3, embed_dim=96, norm_layer=None):
        super().__init__()
        img_size = to_2tuple(img_size)
        # patch_size = to_2tuple(patch_size)
        patches_resolution = [img_size[0] // patch_size[0], img_size[0] // patch_size[0]]
        self.img_size = img_size
        self.patch_size = patch_size
        self.patches_resolution = patches_resolution
        self.num_patches = patches_resolution[0] * patches_resolution[1]

        self.in_chans = in_chans
        self.embed_dim = embed_dim

        self.projs = nn.ModuleList()
        for i, ps in enumerate(patch_size):
            if i == len(patch_size) - 1:
                dim = embed_dim // 2 ** i
            else:
                dim = embed_dim // 2 ** (i + 1)
            stride = patch_size[0]
            padding = (ps - patch_size[0]) // 2
            self.projs.append(nn.Conv2d(in_chans, dim, kernel_size=ps, stride=stride, padding=padding))
        if norm_layer is not None:
            self.norm = norm_layer(embed_dim)
        else:
            self.norm = None

    def forward(self, x):
        B, C, H, W = x.shape
        # FIXME look at relaxing size constraints
        assert H == self.img_size[0] and W == self.img_size[1], \
            f"Input image size ({H}*{W}) doesn't match model ({self.img_size[0]}*{self.img_size[1]})."
        xs = []
        for i in range(len(self.projs)):
            tx = self.projs[i](x).flatten(2).transpose(1, 2)
            xs.append(tx)  # B Ph*Pw C
        x = torch.cat(xs, dim=2)
        if self.norm is not None:
            x = self.norm(x)
        return x

    def flops(self):
        Ho, Wo = self.patches_resolution
        flops = 0
        for i, ps in enumerate(self.patch_size):
            if i == len(self.patch_size) - 1:
                dim = self.embed_dim // 2 ** i
            else:
                dim = self.embed_dim // 2 ** (i + 1)
            flops += Ho * Wo * dim * self.in_chans * (self.patch_size[i] * self.patch_size[i])
        if self.norm is not None:
            flops += Ho * Wo * self.embed_dim
        return flops


class CrossFormer(nn.Module):
    r""" CrossFormer
        A PyTorch impl of : `CrossFormer: A Versatile Vision Transformer Based on Cross-scale Attention`  -

    Args:
        img_size (int | tuple(int)): Input image size. Default 224
        patch_size (int | tuple(int)): Patch size. Default: 4
        in_chans (int): Number of input image channels. Default: 3
        num_classes (int): Number of classes for classification head. Default: 1000
        embed_dim (int): Patch embedding dimension. Default: 96
        depths (tuple(int)): Depth of each stage.
        num_heads (tuple(int)): Number of attention heads in different layers.
        group_size (int): Group size. Default: 7
        mlp_ratio (float): Ratio of mlp hidden dim to embedding dim. Default: 4
        qkv_bias (bool): If True, add a learnable bias to query, key, value. Default: True
        qk_scale (float): Override default qk scale of head_dim ** -0.5 if set. Default: None
        drop_rate (float): Dropout rate. Default: 0
        attn_drop_rate (float): Attention dropout rate. Default: 0
        drop_path_rate (float): Stochastic depth rate. Default: 0.1
        norm_layer (nn.Module): Normalization layer. Default: nn.LayerNorm.
        ape (bool): If True, add absolute position embedding to the patch embedding. Default: False
        patch_norm (bool): If True, add normalization after patch embedding. Default: True
        use_checkpoint (bool): Whether to use checkpointing to save memory. Default: False
    """

    def __init__(self, img_size=224, patch_size=[4], in_chans=3, num_classes=1000,
                 embed_dim=96, depths=[2, 2, 6, 2], num_heads=[3, 6, 12, 24],
                 group_size=7, mlp_ratio=4., qkv_bias=True, qk_scale=None,
                 drop_rate=0., attn_drop_rate=0., drop_path_rate=0.1,
                 norm_layer=nn.LayerNorm, ape=False, patch_norm=True,
                 use_checkpoint=False, merge_size=[[2], [2], [2]], 
                 reduced_dims=[2, 2, 2, 2], **kwargs):
        super().__init__()

        self.num_classes = num_classes
        self.num_layers = len(depths)
        self.embed_dim = embed_dim
        self.ape = ape
        self.patch_norm = patch_norm
        self.num_features = int(embed_dim * 2 ** (self.num_layers - 1))
        self.mlp_ratio = mlp_ratio

        # split image into non-overlapping patches
        self.patch_embed = PatchEmbed(
            img_size=img_size, patch_size=patch_size, in_chans=in_chans, embed_dim=embed_dim,
            norm_layer=norm_layer if self.patch_norm else None)
        num_patches = self.patch_embed.num_patches
        patches_resolution = self.patch_embed.patches_resolution
        self.patches_resolution = patches_resolution

        # absolute position embedding
        if self.ape:
            self.absolute_pos_embed = nn.Parameter(torch.zeros(1, num_patches, embed_dim))
            trunc_normal_(self.absolute_pos_embed, std=.02)

        self.pos_drop = nn.Dropout(p=drop_rate)

        # stochastic depth
        dpr = [x.item() for x in torch.linspace(0, drop_path_rate, sum(depths))]  # stochastic depth decay rule

        # build layers
        self.layers = nn.ModuleList()

        num_patch_sizes = [len(patch_size)] + [len(m) for m in merge_size]
        for i_layer in range(self.num_layers):
            patch_size_end = merge_size[i_layer] if i_layer < self.num_layers - 1 else None
            num_patch_size = num_patch_sizes[i_layer]
            layer = Stage(dim=int(embed_dim * 2 ** i_layer),
                               input_resolution=(patches_resolution[0] // (2 ** i_layer),
                                                 patches_resolution[1] // (2 ** i_layer)),
                               depth=depths[i_layer],
                               num_heads=num_heads[i_layer],
                               group_size=group_size[i_layer],
                               mlp_ratio=self.mlp_ratio,
                               qkv_bias=qkv_bias, qk_scale=qk_scale,
                               drop=drop_rate, attn_drop=attn_drop_rate,
                               drop_path=dpr[sum(depths[:i_layer]):sum(depths[:i_layer + 1])],
                               norm_layer=norm_layer,
                               downsample=PatchMerging if (i_layer < self.num_layers - 1) else None,
                               use_checkpoint=use_checkpoint,
                               patch_size_end=patch_size_end,
                               num_patch_size=num_patch_size,
                               reduced_dim=reduced_dims[i_layer])
            self.layers.append(layer)

        self.norm = norm_layer(self.num_features)
        self.avgpool = nn.AdaptiveAvgPool1d(1)
        self.head = nn.Linear(self.num_features, num_classes) if num_classes > 0 else nn.Identity()

        self.apply(self._init_weights)

    def _init_weights(self, m, init_eps=1e-3):
        if isinstance(m, nn.Linear):
            if hasattr(m, "stable") and m.stable:
                # print("Stable init.")
                nn.init.uniform_(m.weight, -init_eps/m.seq_len, init_eps/m.seq_len)
                nn.init.constant_(m.bias, 1)
            else:
                trunc_normal_(m.weight, std=.02)
                if isinstance(m, nn.Linear) and m.bias is not None:
                    nn.init.constant_(m.bias, 0)
        elif isinstance(m, nn.LayerNorm):
            nn.init.constant_(m.bias, 0)
            nn.init.constant_(m.weight, 1.0)

    @torch.jit.ignore
    def no_weight_decay(self):
        return {'absolute_pos_embed'}

    @torch.jit.ignore
    def no_weight_decay_keywords(self):
        return {'relative_position_bias_table'}

    def forward_features(self, x):
        x = self.patch_embed(x)
        if self.ape:
            x = x + self.absolute_pos_embed
        x = self.pos_drop(x)

        for layer in self.layers:
            x = layer(x)

        x = self.norm(x)  # B L C
        x = self.avgpool(x.transpose(1, 2))  # B C 1
        x = torch.flatten(x, 1)
        return x

    def forward(self, x):
        x = self.forward_features(x)
        x = self.head(x)
        return x

    def flops(self):
        flops = 0
        flops += self.patch_embed.flops()
        for i, layer in enumerate(self.layers):
            flops += layer.flops()
        flops += self.num_features * self.patches_resolution[0] * self.patches_resolution[1] // (2 ** self.num_layers)
        flops += self.num_features * self.num_classes
        return flops
    
    
default_cfgs = {
    'TpMLP_S': _cfg(crop_pct=0.9),
    'TpMLP_M': _cfg(crop_pct=0.9),
    'TpMLP_L': _cfg(crop_pct=0.875),
}

@register_model
def tpmlp_t(pretrained=False, **kwargs):
    model = CrossFormer(embed_dim=64, depths=[1, 1, 8, 6], num_heads=[2, 4, 8, 16], group_size=[7, 7, 7, 7],
                        patch_size=[4, 8, 16, 32], merge_size=[[2, 4], [2, 4], [2, 4]], drop_path_rate=0.1, 
                        reduced_dims=[2, 2, 2, 2], **kwargs)
    model.default_cfg = default_cfgs['TpMLP_L']
    return model

@register_model
def tpmlp_s(pretrained=False, **kwargs):
    model = CrossFormer(embed_dim=96, depths=[2, 2, 6, 2], num_heads=[3, 6, 12, 24], group_size=[7, 7, 7, 7],
                        patch_size=[4, 8, 16, 32], merge_size=[[2, 4], [2, 4], [2, 4]], drop_path_rate=0.2, 
                        reduced_dims=[4, 4, 4, 4], **kwargs)
    model.default_cfg = default_cfgs['TpMLP_L']
    return model

@register_model
def tpmlp_b(pretrained=False, **kwargs):
    model = CrossFormer(embed_dim=96, depths=[2, 2, 18, 2], num_heads=[3, 6, 12, 24], group_size=[7, 7, 7, 7],
                        patch_size=[4, 8, 16, 32], merge_size=[[2, 4], [2, 4], [2, 4]], drop_path_rate=0.3, 
                        reduced_dims=[4, 4, 4, 4], **kwargs)
    model.default_cfg = default_cfgs['TpMLP_L']
    return model

@register_model
def tpmlp_l(pretrained=False, **kwargs):
    model = CrossFormer(embed_dim=128, depths=[2, 2, 18, 2], num_heads=[4, 8, 16, 32], group_size=[7, 7, 7, 7],
                        patch_size=[4, 8, 16, 32], merge_size=[[2, 4], [2, 4], [2, 4]], drop_path_rate=0.5, 
                        reduced_dims=[4, 4, 4, 4], **kwargs)
    model.default_cfg = default_cfgs['TpMLP_L']
    return model