llama3_2_vision_encoder¶
- torchtune.models.llama3_2_vision.llama3_2_vision_encoder(*, patch_size: int, num_heads: int, clip_embed_dim: int, clip_num_layers: int, clip_hidden_states: Optional[List[int]], num_layers_projection: int, decoder_embed_dim: int, tile_size: int, max_num_tiles: int = 4, in_channels: int = 3) Llama3VisionEncoder[source]¶
Build the Llama 3.2 vision encoder by combining the CLIP image model with an additional projection head fusion module. This includes: - Spatial positional encodings - CLIP model backbone - Projection head on top of CLIP - Final projection into token embedding dimension
- Parameters:
patch_size (int) – The size of each patch. Used to divide the tiles into patches. E.g. for
patch_size=40, a tile of shape (400, 400) will have 10x10 grid of patches with shape (40, 40) each.num_heads (int) – The number of attention heads in each transformer layer.
clip_embed_dim (int) – The dimensionality of each patch embedding in CLIP.
clip_num_layers (int) – The number of transformer layers.
clip_hidden_states (Optional[List[int]]) – The indices of CLIP hidden layers to return to return to the encoder projection head. It will return the intermediate results of the vision transformer layers which will be concatenated with the CLIP output and input into the projection head. For example,
clip_hidden_states=[0,3]will return the embeddings before they go through the first and fourth layers.num_layers_projection (int) – The number of transformer layers in the projection head.
decoder_embed_dim (int) – The dimensionality of the final output embeddings for the decoder.
tile_size (int) – The size of your image tiles, if the image was tile-cropped in advance. Otherwise, the size of the input image. In this case, the function will consider your image as a single tile.
max_num_tiles (int) – The maximum number of tiles that can be processed. This is used to determine the size of the positional embeddings.
in_channels (int) – The number of image input channels.
- Returns:
Instantiation of Llama 3.2 vision encoder.
- Return type:
