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mindflow.cell.ViT

class mindflow.cell.ViT(image_size=(192, 384), in_channels=7, out_channels=3, patch_size=16, encoder_depths=12, encoder_embed_dim=768, encoder_num_heads=12, decoder_depths=8, decoder_embed_dim=512, decoder_num_heads=16, mlp_ratio=4, dropout_rate=1.0, compute_dtype=mstype.float16)

This module based on ViT backbone which including encoder, decoding_embedding, decoder and dense layer.

Parameters

• image_size (tuple[int]) – The image size of input. Default: (192, 384).

• in_channels (int) – The input feature size of input. Default: 7.

• out_channels (int) – The output feature size of output. Default: 3.

• patch_size (int) – The patch size of image. Default: 16.

• encoder_depths (int) – The encoder depth of encoder layer. Default: 12.

• encoder_embed_dim (int) – The encoder embedding dimension of encoder layer. Default: 768.

• encoder_num_heads (int) – The encoder heads’ number of encoder layer. Default: 12.

• decoder_depths (int) – The decoder depth of decoder layer. Default: 8.

• decoder_embed_dim (int) – The decoder embedding dimension of decoder layer. Default: 512.

• decoder_num_heads (int) – The decoder heads’ number of decoder layer. Default: 16.

• mlp_ratio (int) – The rate of mlp layer. Default: 4.

• dropout_rate (float) – The rate of dropout layer. Default: 1.0.

• compute_dtype (dtype) – The data type for encoder, decoding_embedding, decoder and dense layer. Default: mstype.float16.

Inputs:

• input (Tensor) - Tensor of shape $(batch\mathrm{\_}size,feature\mathrm{\_}size,image\mathrm{\_}height,image\mathrm{\_}width)$.

Outputs:

• output (Tensor) - Tensor of shape $(batch\mathrm{\_}size,patchify\mathrm{\_}size,embed\mathrm{\_}dim)$. where patchify_size = (image_height * image_width) / (patch_size * patch_size)

Supported Platforms:

Ascend GPU

Examples

>>> import numpy as np
>>> from mindspore import Tensor
>>> from mindspore import context
>>> from mindspore import dtype as mstype
>>> from mindflow.cell import ViT
>>> input_tensor = Tensor(np.ones((32, 3, 192, 384)), mstype.float32)
>>> print(input_tensor.shape)
(32, 3, 192, 384)
>>> model = ViT(in_channels=3,
>>>             out_channels=3,
>>>             encoder_depths=6,
>>>             encoder_embed_dim=768,
>>>             encoder_num_heads=12,
>>>             decoder_depths=6,
>>>             decoder_embed_dim=512,
>>>             decoder_num_heads=16,
>>>             )
>>> output_tensor = model(input_tensor)
>>> print(output_tensor.shape)
(32, 288, 768)