tags:
- vision
Model Card: clip-rsicd
Model Details
This model is a fine-tuned CLIP by OpenAI. It is designed with an aim to improve zero-shot image classification, text-to-image and image-to-image retrieval specifically on remote sensing images.
Model Date
July 2021
Model Type
The base model uses a ViT-B/32 Transformer architecture as an image encoder and uses a masked self-attention Transformer as a text encoder. These encoders are trained to maximize the similarity of (image, text) pairs via a contrastive loss.
Model Version
We release several checkpoints for clip-rsicd model. Refer to our github repo for performance metrics on zero-shot classification for each of those.
Training
To reproduce the fine-tuning procedure one can use released script. The model was trained using batch size 1024, adafactor optimizer with linear warmup and decay with peak learning rate 1e-4 on 1 TPU-v3-8. Full log of the training run can be found on WandB.
Demo
Check out the model text-to-image and image-to-image capabilities using this demo.
Documents
Use with Transformers
from PIL import Image
import requests
from transformers import CLIPProcessor, CLIPModel
model = CLIPModel.from_pretrained("flax-community/clip-rsicd-v2")
processor = CLIPProcessor.from_pretrained("flax-community/clip-rsicd-v2")
url = "https://raw.githubusercontent.com/arampacha/CLIP-rsicd/master/data/stadium_1.jpg"
image = Image.open(requests.get(url, stream=True).raw)
labels = ["residential area", "playground", "stadium", "forest", "airport"]
inputs = processor(text=[f"a photo of a {l}" for l in labels], images=image, return_tensors="pt", padding=True)
outputs = model(**inputs)
logits_per_image = outputs.logits_per_image # this is the image-text similarity score
probs = logits_per_image.softmax(dim=1) # we can take the softmax to get the label probabilities
for l, p in zip(labels, probs[0]):
print(f"{l:<16} {p:.4f}")
Model Use
Intended Use
The model is intended as a research output for research communities. We hope that this model will enable researchers to better understand and explore zero-shot, arbitrary image classification.
In addition, we can imagine applications in defense and law enforcement, climate change and global warming, and even some consumer applications. A partial list of applications can be found here. In general we think such models can be useful as digital assistants for humans engaged in searching through large collections of images.
We also hope it can be used for interdisciplinary studies of the potential impact of such models - the CLIP paper includes a discussion of potential downstream impacts to provide an example for this sort of analysis.
Primary intended uses
The primary intended users of these models are AI researchers.
We primarily imagine the model will be used by researchers to better understand robustness, generalization, and other capabilities, biases, and constraints of computer vision models.
Data
The model was trained on publicly available remote sensing image captions datasets. Namely RSICD, UCM and Sydney. More information on the datasets used can be found on our project page.
Performance and Limitations
Performance
| Model-name | k=1 | k=3 | k=5 | k=10 |
|---|---|---|---|---|
| original CLIP | 0.572 | 0.745 | 0.837 | 0.939 |
| clip-rsicd-v2 (this model) | 0.883 | 0.968 | 0.982 | 0.998 |
Limitations
The model is fine-tuned on RSI data but can contain some biases and limitations of the original CLIP model. Refer to CLIP model card for details on those.