Delete vary_b.py

vary_b.py

@@ -1,468 +0,0 @@
-import torch
-import torch.nn.functional as F
-from typing import Optional, Tuple, Type
-from functools import partial
-import torch.nn as nn
-from typing import Type
-
-
-
-class MLPBlock(nn.Module):
-    def __init__(
-        self,
-        embedding_dim: int,
-        mlp_dim: int,
-        act: Type[nn.Module] = nn.GELU,
-    ) -> None:
-        super().__init__()
-        self.lin1 = nn.Linear(embedding_dim, mlp_dim)
-        self.lin2 = nn.Linear(mlp_dim, embedding_dim)
-        self.act = act()
-
-    def forward(self, x: torch.Tensor) -> torch.Tensor:
-        return self.lin2(self.act(self.lin1(x)))
-
-
-
-class LayerNorm2d(nn.Module):
-    def __init__(self, num_channels: int, eps: float = 1e-6) -> None:
-        super().__init__()
-        self.weight = nn.Parameter(torch.ones(num_channels))
-        self.bias = nn.Parameter(torch.zeros(num_channels))
-        self.eps = eps
-
-    def forward(self, x: torch.Tensor) -> torch.Tensor:
-        u = x.mean(1, keepdim=True)
-        s = (x - u).pow(2).mean(1, keepdim=True)
-        x = (x - u) / torch.sqrt(s + self.eps)
-        x = self.weight[:, None, None] * x + self.bias[:, None, None]
-        return x
-
-
-
-class ImageEncoderViT(nn.Module):
-    def __init__(
-        self,
-        img_size: int = 1024,
-        patch_size: int = 16,
-        in_chans: int = 3,
-        embed_dim: int = 768,
-        depth: int = 12,
-        num_heads: int = 12,
-        mlp_ratio: float = 4.0,
-        out_chans: int = 256,
-        qkv_bias: bool = True,
-        norm_layer: Type[nn.Module] = nn.LayerNorm,
-        act_layer: Type[nn.Module] = nn.GELU,
-        use_abs_pos: bool = True,
-        use_rel_pos: bool = False,
-        rel_pos_zero_init: bool = True,
-        window_size: int = 0,
-        global_attn_indexes: Tuple[int, ...] = (),
-    ) -> None:
-        """
-        Args:
-            img_size (int): Input image size.
-            patch_size (int): Patch size.
-            in_chans (int): Number of input image channels.
-            embed_dim (int): Patch embedding dimension.
-            depth (int): Depth of ViT.
-            num_heads (int): Number of attention heads in each ViT block.
-            mlp_ratio (float): Ratio of mlp hidden dim to embedding dim.
-            qkv_bias (bool): If True, add a learnable bias to query, key, value.
-            norm_layer (nn.Module): Normalization layer.
-            act_layer (nn.Module): Activation layer.
-            use_abs_pos (bool): If True, use absolute positional embeddings.
-            use_rel_pos (bool): If True, add relative positional embeddings to the attention map.
-            rel_pos_zero_init (bool): If True, zero initialize relative positional parameters.
-            window_size (int): Window size for window attention blocks.
-            global_attn_indexes (list): Indexes for blocks using global attention.
-        """
-        super().__init__()
-        self.img_size = img_size
-
-        self.patch_embed = PatchEmbed(
-            kernel_size=(patch_size, patch_size),
-            stride=(patch_size, patch_size),
-            in_chans=in_chans,
-            embed_dim=embed_dim,
-        )
-
-        self.pos_embed: Optional[nn.Parameter] = None
-        if use_abs_pos:
-            # Initialize absolute positional embedding with pretrain image size.
-            self.pos_embed = nn.Parameter(
-                torch.zeros(1, img_size // patch_size, img_size // patch_size, embed_dim)
-            )
-
-        self.blocks = nn.ModuleList()
-        for i in range(depth):
-            block = Block(
-                dim=embed_dim,
-                num_heads=num_heads,
-                mlp_ratio=mlp_ratio,
-                qkv_bias=qkv_bias,
-                norm_layer=norm_layer,
-                act_layer=act_layer,
-                use_rel_pos=use_rel_pos,
-                rel_pos_zero_init=rel_pos_zero_init,
-                window_size=window_size if i not in global_attn_indexes else 0,
-                input_size=(img_size // patch_size, img_size // patch_size),
-            )
-            self.blocks.append(block)
-
-        self.neck = nn.Sequential(
-            nn.Conv2d(
-                embed_dim,
-                out_chans,
-                kernel_size=1,
-                bias=False,
-            ),
-            LayerNorm2d(out_chans),
-            nn.Conv2d(
-                out_chans,
-                out_chans,
-                kernel_size=3,
-                padding=1,
-                bias=False,
-            ),
-            LayerNorm2d(out_chans),
-        )
-
-        
-        self.net_2 = nn.Conv2d(256, 512, kernel_size=3, stride=2, padding=1, bias=False)
-        self.net_3 = nn.Conv2d(512, 1024, kernel_size=3, stride=2, padding=1, bias=False)
-
-    def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = self.patch_embed(x)
-        if self.pos_embed is not None:
-            x = x + self.pos_embed
-
-        for blk in self.blocks:
-            x = blk(x)
-
-        x = self.neck(x.permute(0, 3, 1, 2))
-        x = self.net_2(x)
-        x = self.net_3(x)
-
-
-        return x
-
-
-class Block(nn.Module):
-    """Transformer blocks with support of window attention and residual propagation blocks"""
-
-    def __init__(
-        self,
-        dim: int,
-        num_heads: int,
-        mlp_ratio: float = 4.0,
-        qkv_bias: bool = True,
-        norm_layer: Type[nn.Module] = nn.LayerNorm,
-        act_layer: Type[nn.Module] = nn.GELU,
-        use_rel_pos: bool = False,
-        rel_pos_zero_init: bool = True,
-        window_size: int = 0,
-        input_size: Optional[Tuple[int, int]] = None,
-    ) -> None:
-        """
-        Args:
-            dim (int): Number of input channels.
-            num_heads (int): Number of attention heads in each ViT block.
-            mlp_ratio (float): Ratio of mlp hidden dim to embedding dim.
-            qkv_bias (bool): If True, add a learnable bias to query, key, value.
-            norm_layer (nn.Module): Normalization layer.
-            act_layer (nn.Module): Activation layer.
-            use_rel_pos (bool): If True, add relative positional embeddings to the attention map.
-            rel_pos_zero_init (bool): If True, zero initialize relative positional parameters.
-            window_size (int): Window size for window attention blocks. If it equals 0, then
-                use global attention.
-            input_size (tuple(int, int) or None): Input resolution for calculating the relative
-                positional parameter size.
-        """
-        super().__init__()
-        self.norm1 = norm_layer(dim)
-        self.attn = Attention(
-            dim,
-            num_heads=num_heads,
-            qkv_bias=qkv_bias,
-            use_rel_pos=use_rel_pos,
-            rel_pos_zero_init=rel_pos_zero_init,
-            input_size=input_size if window_size == 0 else (window_size, window_size),
-        )
-
-        self.norm2 = norm_layer(dim)
-        self.mlp = MLPBlock(embedding_dim=dim, mlp_dim=int(dim * mlp_ratio), act=act_layer)
-
-        self.window_size = window_size
-
-    def forward(self, x: torch.Tensor) -> torch.Tensor:
-        shortcut = x
-        x = self.norm1(x)
-        # Window partition
-        if self.window_size > 0:
-            H, W = x.shape[1], x.shape[2]
-            x, pad_hw = window_partition(x, self.window_size)
-
-        x = self.attn(x)
-        # Reverse window partition
-        if self.window_size > 0:
-            x = window_unpartition(x, self.window_size, pad_hw, (H, W))
-
-        x = shortcut + x
-        x = x + self.mlp(self.norm2(x))
-
-        return x
-
-
-class Attention(nn.Module):
-    """Multi-head Attention block with relative position embeddings."""
-
-    def __init__(
-        self,
-        dim: int,
-        num_heads: int = 8,
-        qkv_bias: bool = True,
-        use_rel_pos: bool = False,
-        rel_pos_zero_init: bool = True,
-        input_size: Optional[Tuple[int, int]] = None,
-    ) -> None:
-        """
-        Args:
-            dim (int): Number of input channels.
-            num_heads (int): Number of attention heads.
-            qkv_bias (bool):  If True, add a learnable bias to query, key, value.
-            rel_pos (bool): If True, add relative positional embeddings to the attention map.
-            rel_pos_zero_init (bool): If True, zero initialize relative positional parameters.
-            input_size (tuple(int, int) or None): Input resolution for calculating the relative
-                positional parameter size.
-        """
-        super().__init__()
-        self.num_heads = num_heads
-        head_dim = dim // num_heads
-        self.scale = head_dim**-0.5
-
-        self.qkv = nn.Linear(dim, dim * 3, bias=qkv_bias)
-        self.proj = nn.Linear(dim, dim)
-
-        self.use_rel_pos = use_rel_pos
-        if self.use_rel_pos:
-            assert (
-                input_size is not None
-            ), "Input size must be provided if using relative positional encoding."
-            # initialize relative positional embeddings
-            self.rel_pos_h = nn.Parameter(torch.zeros(2 * input_size[0] - 1, head_dim))
-            self.rel_pos_w = nn.Parameter(torch.zeros(2 * input_size[1] - 1, head_dim))
-
-    def forward(self, x: torch.Tensor) -> torch.Tensor:
-        B, H, W, _ = x.shape
-        # qkv with shape (3, B, nHead, H * W, C)
-        qkv = self.qkv(x).reshape(B, H * W, 3, self.num_heads, -1).permute(2, 0, 3, 1, 4)
-        # q, k, v with shape (B * nHead, H * W, C)
-        q, k, v = qkv.reshape(3, B * self.num_heads, H * W, -1).unbind(0)
-
-        attn = (q * self.scale) @ k.transpose(-2, -1)
-
-        if self.use_rel_pos:
-            attn = add_decomposed_rel_pos(attn, q, self.rel_pos_h, self.rel_pos_w, (H, W), (H, W))
-
-        attn = attn.softmax(dim=-1)
-        x = (attn @ v).view(B, self.num_heads, H, W, -1).permute(0, 2, 3, 1, 4).reshape(B, H, W, -1)
-        x = self.proj(x)
-
-        return x
-
-
-def window_partition(x: torch.Tensor, window_size: int) -> Tuple[torch.Tensor, Tuple[int, int]]:
-    """
-    Partition into non-overlapping windows with padding if needed.
-    Args:
-        x (tensor): input tokens with [B, H, W, C].
-        window_size (int): window size.
-
-    Returns:
-        windows: windows after partition with [B * num_windows, window_size, window_size, C].
-        (Hp, Wp): padded height and width before partition
-    """
-    B, H, W, C = x.shape
-
-    pad_h = (window_size - H % window_size) % window_size
-    pad_w = (window_size - W % window_size) % window_size
-    if pad_h > 0 or pad_w > 0:
-        x = F.pad(x, (0, 0, 0, pad_w, 0, pad_h))
-    Hp, Wp = H + pad_h, W + pad_w
-
-    x = x.view(B, Hp // window_size, window_size, Wp // window_size, window_size, C)
-    windows = x.permute(0, 1, 3, 2, 4, 5).contiguous().view(-1, window_size, window_size, C)
-    return windows, (Hp, Wp)
-
-
-def window_unpartition(
-    windows: torch.Tensor, window_size: int, pad_hw: Tuple[int, int], hw: Tuple[int, int]
-) -> torch.Tensor:
-    """
-    Window unpartition into original sequences and removing padding.
-    Args:
-        windows (tensor): input tokens with [B * num_windows, window_size, window_size, C].
-        window_size (int): window size.
-        pad_hw (Tuple): padded height and width (Hp, Wp).
-        hw (Tuple): original height and width (H, W) before padding.
-
-    Returns:
-        x: unpartitioned sequences with [B, H, W, C].
-    """
-    Hp, Wp = pad_hw
-    H, W = hw
-    B = windows.shape[0] // (Hp * Wp // window_size // window_size)
-    x = windows.view(B, Hp // window_size, Wp // window_size, window_size, window_size, -1)
-    x = x.permute(0, 1, 3, 2, 4, 5).contiguous().view(B, Hp, Wp, -1)
-
-    if Hp > H or Wp > W:
-        x = x[:, :H, :W, :].contiguous()
-    return x
-
-
-def get_rel_pos(q_size: int, k_size: int, rel_pos: torch.Tensor) -> torch.Tensor:
-    """
-    Get relative positional embeddings according to the relative positions of
-        query and key sizes.
-    Args:
-        q_size (int): size of query q.
-        k_size (int): size of key k.
-        rel_pos (Tensor): relative position embeddings (L, C).
-
-    Returns:
-        Extracted positional embeddings according to relative positions.
-    """
-    max_rel_dist = int(2 * max(q_size, k_size) - 1)
-    # Interpolate rel pos if needed.
-    if rel_pos.shape[0] != max_rel_dist:
-        # Interpolate rel pos.
-        rel_pos_resized = F.interpolate(
-            rel_pos.reshape(1, rel_pos.shape[0], -1).permute(0, 2, 1),
-            size=max_rel_dist,
-            mode="linear",
-        )
-        rel_pos_resized = rel_pos_resized.reshape(-1, max_rel_dist).permute(1, 0)
-    else:
-        rel_pos_resized = rel_pos
-
-    # Scale the coords with short length if shapes for q and k are different.
-    q_coords = torch.arange(q_size)[:, None] * max(k_size / q_size, 1.0)
-    k_coords = torch.arange(k_size)[None, :] * max(q_size / k_size, 1.0)
-    relative_coords = (q_coords - k_coords) + (k_size - 1) * max(q_size / k_size, 1.0)
-
-    return rel_pos_resized[relative_coords.long()]
-
-
-def add_decomposed_rel_pos(
-    attn: torch.Tensor,
-    q: torch.Tensor,
-    rel_pos_h: torch.Tensor,
-    rel_pos_w: torch.Tensor,
-    q_size: Tuple[int, int],
-    k_size: Tuple[int, int],
-) -> torch.Tensor:
-    """
-    Args:
-        attn (Tensor): attention map.
-        q (Tensor): query q in the attention layer with shape (B, q_h * q_w, C).
-        rel_pos_h (Tensor): relative position embeddings (Lh, C) for height axis.
-        rel_pos_w (Tensor): relative position embeddings (Lw, C) for width axis.
-        q_size (Tuple): spatial sequence size of query q with (q_h, q_w).
-        k_size (Tuple): spatial sequence size of key k with (k_h, k_w).
-
-    Returns:
-        attn (Tensor): attention map with added relative positional embeddings.
-    """
-    q_h, q_w = q_size
-    k_h, k_w = k_size
-    Rh = get_rel_pos(q_h, k_h, rel_pos_h)
-    Rw = get_rel_pos(q_w, k_w, rel_pos_w)
-
-    B, _, dim = q.shape
-    r_q = q.reshape(B, q_h, q_w, dim)
-    rel_h = torch.einsum("bhwc,hkc->bhwk", r_q, Rh)
-    rel_w = torch.einsum("bhwc,wkc->bhwk", r_q, Rw)
-
-    attn = (
-        attn.view(B, q_h, q_w, k_h, k_w) + rel_h[:, :, :, :, None] + rel_w[:, :, :, None, :]
-    ).view(B, q_h * q_w, k_h * k_w)
-
-    return attn
-
-
-class PatchEmbed(nn.Module):
-    """
-    Image to Patch Embedding.
-    """
-
-    def __init__(
-        self,
-        kernel_size: Tuple[int, int] = (16, 16),
-        stride: Tuple[int, int] = (16, 16),
-        padding: Tuple[int, int] = (0, 0),
-        in_chans: int = 3,
-        embed_dim: int = 768,
-    ) -> None:
-        """
-        Args:
-            kernel_size (Tuple): kernel size of the projection layer.
-            stride (Tuple): stride of the projection layer.
-            padding (Tuple): padding size of the projection layer.
-            in_chans (int): Number of input image channels.
-            embed_dim (int): Patch embedding dimension.
-        """
-        super().__init__()
-
-        self.proj = nn.Conv2d(
-            in_chans, embed_dim, kernel_size=kernel_size, stride=stride, padding=padding
-        )
-
-    def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = self.proj(x)
-        # B C H W -> B H W C
-        x = x.permute(0, 2, 3, 1)
-        return x
-
-
-
-def build_vary_vit_b(checkpoint=None):
-    return _build_vary(
-        encoder_embed_dim=768,
-        encoder_depth=12,
-        encoder_num_heads=12,
-        encoder_global_attn_indexes=[2, 5, 8, 11],
-        checkpoint=checkpoint,
-    )
-
-
-def _build_vary(
-    encoder_embed_dim,
-    encoder_depth,
-    encoder_num_heads,
-    encoder_global_attn_indexes,
-    checkpoint=None,
-):
-    prompt_embed_dim = 256
-    image_size = 1024
-    vit_patch_size = 16
-    image_embedding_size = image_size // vit_patch_size
-    image_encoder=ImageEncoderViT(
-            depth=encoder_depth,
-            embed_dim=encoder_embed_dim,
-            img_size=image_size,
-            mlp_ratio=4,
-            norm_layer=partial(torch.nn.LayerNorm, eps=1e-6),
-            num_heads=encoder_num_heads,
-            patch_size=vit_patch_size,
-            qkv_bias=True,
-            use_rel_pos=True,
-            global_attn_indexes=encoder_global_attn_indexes,
-            window_size=14,
-            out_chans=prompt_embed_dim,
-        )
-    
-
-    return image_encoder
-