Model Overview
Description:
This model performs visual feature extraction.
For instance, RADIO generates image embeddings that can be used by a downstream model to classify images.
License/Terms of Use
[License] This model is governed by the
NVIDIA Open Model License Agreement.
References:
Model Architecture:
Architecture Type: Neural Network
Network Architecture: Vision Transformer
Input:
Input Type(s): Image
Input Format(s): Red, Green, Blue (RGB) pixel values in [0, 1] range.
Input Parameters: Two Dimensional (2D)
Other Properties Related to Input: Image resolutions up to 2048x2028 in increments of 16 pixels
Output:
Output Type(s): Embeddings
Output Format: Tensor
Output Parameters: 2D
Other Properties Related to Output: Downstream model required to leverage image features
Usage:
RADIO will return a tuple with two tensors.
The summary is similar to the cls_token in ViT and is meant to represent the general concept of the entire image.
It has shape (B,C) with B being the batch dimension, and C being some number of channels.
The spatial_features represent more localized content which should be suitable for dense tasks such as semantic segmentation, or for integration into an LLM.
1import torch
2from PIL import Image
3from transformers import AutoModel, CLIPImageProcessor
4
5hf_repo = "nvidia/C-RADIO"
6
7image_processor = CLIPImageProcessor.from_pretrained(hf_repo)
8model = AutoModel.from_pretrained(hf_repo, trust_remote_code=True)
9model.eval().cuda()
10
11image = Image.open('./assets/radio.png').convert('RGB')
12pixel_values = image_processor(images=image, return_tensors='pt', do_resize=True).pixel_values
13pixel_values = pixel_values.cuda()
14
15summary, features = model(pixel_values)
Spatial features have shape (B,T,D) with T being the flattened spatial tokens, and D being the channels for spatial features. Note that C!=D in general.
Converting to a spatial tensor format can be done using the downsampling size of the model, combined with the input tensor shape. For RADIO, the patch size is 16.
1from einops import rearrange
2spatial_features = rearrange(spatial_features, 'b (h w) d -> b d h w', h=x.shape[-2] // patch_size, w=x.shape[-1] // patch_size)
The resulting tensor will have shape (B,D,H,W), as is typically seen with computer vision models.
Software Integration:
Runtime Engine(s):
Supported Hardware Microarchitecture Compatibility:
- NVIDIA Ampere
- NVIDIA Blackwell
- NVIDIA Jetson
- NVIDIA Hopper
- NVIDIA Lovelace
- NVIDIA Pascal
- NVIDIA Turing
- NVIDIA Volta
[Preferred/Supported] Operating System(s):
- Linux
- Linux 4 Tegra
- QNX
- Windows
Model Version(s):
C-RADIO.
Training, Testing, and Evaluation Datasets:
Training Dataset:
NV-CC-Img-Text-Dataset
** Data Collection Method by dataset
- Automated
** Labeling Method by dataset
- Not Applicable (no labels are needed)
Properties: 700 Million Images
Evaluation Dataset:
Link: ImageNet
** Data Collection Method by dataset
- Automated
** Labeling Method by dataset
- Human
Properties: This dataset spans 1000 object classes and contains 1,281,167 training images, 50,000 validation images and 100,000 test images.
Inference:
Engine: PyTorch
Test Hardware: A100
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