#
LuminaNextDiT2DModel

A Next Version of Diffusion Transformer model for 2D data from Lumina-T2X.

##
LuminaNextDiT2DModel

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class diffusers.LuminaNextDiT2DModel

< source >

( sample_size: int = 128 patch_size: Optional = 2 in_channels: Optional = 4 hidden_size: Optional = 2304 num_layers: Optional = 32 num_attention_heads: Optional = 32 num_kv_heads: Optional = None multiple_of: Optional = 256 ffn_dim_multiplier: Optional = None norm_eps: Optional = 1e-05 learn_sigma: Optional = True qk_norm: Optional = True cross_attention_dim: Optional = 2048 scaling_factor: Optional = 1.0 )

Parameters

- sample_size (`int`) — The width of the latent images. This is fixed during training since it is used to learn a number of position embeddings.
- patch_size (`int`, optional, (`int`, optional, defaults to 2) — The size of each patch in the image. This parameter defines the resolution of patches fed into the model.
- in_channels (`int`, optional, defaults to 4) — The number of input channels for the model. Typically, this matches the number of channels in the input images.
- hidden_size (`int`, optional, defaults to 4096) — The dimensionality of the hidden layers in the model. This parameter determines the width of the model’s hidden representations.
- num_layers (`int`, optional, default to 32) — The number of layers in the model. This defines the depth of the neural network.
- num_attention_heads (`int`, optional, defaults to 32) — The number of attention heads in each attention layer. This parameter specifies how many separate attention mechanisms are used.
- num_kv_heads (`int`, optional, defaults to 8) — The number of key-value heads in the attention mechanism, if different from the number of attention heads. If None, it defaults to num_attention_heads.
- multiple_of (`int`, optional, defaults to 256) — A factor that the hidden size should be a multiple of. This can help optimize certain hardware configurations.
- ffn_dim_multiplier (`float`, optional) — A multiplier for the dimensionality of the feed-forward network. If None, it uses a default value based on the model configuration.
- norm_eps (`float`, optional, defaults to 1e-5) — A small value added to the denominator for numerical stability in normalization layers.
- learn_sigma (`bool`, optional, defaults to True) — Whether the model should learn the sigma parameter, which might be related to uncertainty or variance in predictions.
- qk_norm (`bool`, optional, defaults to True) — Indicates if the queries and keys in the attention mechanism should be normalized.
- cross_attention_dim (`int`, optional, defaults to 2048) — The dimensionality of the text embeddings. This parameter defines the size of the text representations used in the model.
- scaling_factor (`float`, optional, defaults to 1.0) — A scaling factor applied to certain parameters or layers in the model. This can be used for adjusting the overall scale of the model’s operations.

LuminaNextDiT: Diffusion model with a Transformer backbone.

Inherit ModelMixin and ConfigMixin to be compatible with the sampler StableDiffusionPipeline of diffusers.

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forward

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( hidden_states: Tensor timestep: Tensor encoder_hidden_states: Tensor encoder_mask: Tensor image_rotary_emb: Tensor cross_attention_kwargs: Dict = None return_dict = True )

Parameters

- hidden_states (torch.Tensor) — Input tensor of shape (N, C, H, W).
- timestep (torch.Tensor) — Tensor of diffusion timesteps of shape (N,).
- encoder_hidden_states (torch.Tensor) — Tensor of caption features of shape (N, D).
- encoder_mask (torch.Tensor) — Tensor of caption masks of shape (N, L).

Forward pass of LuminaNextDiT.

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