Mask2former Swin Tiny Cityscapes Instance

🚀 Mask2Former

The Mask2Former model is trained on Cityscapes instance segmentation (tiny - sized version, Swin backbone). It offers a unified approach for image segmentation tasks.

🚀 Quick Start

The Mask2Former model is designed to handle instance, semantic, and panoptic segmentation. It was introduced in the paper Masked - attention Mask Transformer for Universal Image Segmentation and first released in this repository.

✨ Features

• Unified Paradigm: Addresses instance, semantic, and panoptic segmentation using the same approach by predicting a set of masks and corresponding labels.
• Performance and Efficiency: Outperforms the previous SOTA MaskFormer through several improvements:
  • Replaces the pixel decoder with a more advanced multi - scale deformable attention Transformer.
  • Adopts a Transformer decoder with masked attention to boost performance without extra computation.
  • Improves training efficiency by calculating the loss on subsampled points instead of whole masks.

📚 Documentation

Model description

Mask2Former addresses instance, semantic and panoptic segmentation with the same paradigm: by predicting a set of masks and corresponding labels. Hence, all 3 tasks are treated as if they were instance segmentation. Mask2Former outperforms the previous SOTA, MaskFormer both in terms of performance an efficiency by (i) replacing the pixel decoder with a more advanced multi - scale deformable attention Transformer, (ii) adopting a Transformer decoder with masked attention to boost performance without introducing additional computation and (iii) improving training efficiency by calculating the loss on subsampled points instead of whole masks.

Intended uses & limitations

You can use this particular checkpoint for instance segmentation. See the model hub to look for other fine - tuned versions on a task that interests you.

💻 Usage Examples

Basic Usage

import requests
import torch
from PIL import Image
from transformers import AutoImageProcessor, Mask2FormerForUniversalSegmentation


# load Mask2Former fine-tuned on Cityscapes instance segmentation
processor = AutoImageProcessor.from_pretrained("facebook/mask2former-swin-tiny-cityscapes-instance")
model = Mask2FormerForUniversalSegmentation.from_pretrained("facebook/mask2former-swin-tiny-cityscapes-instance")

url = "http://images.cocodataset.org/val2017/000000039769.jpg"
image = Image.open(requests.get(url, stream=True).raw)
inputs = processor(images=image, return_tensors="pt")

with torch.no_grad():
    outputs = model(**inputs)

# model predicts class_queries_logits of shape `(batch_size, num_queries)`
# and masks_queries_logits of shape `(batch_size, num_queries, height, width)`
class_queries_logits = outputs.class_queries_logits
masks_queries_logits = outputs.masks_queries_logits

# you can pass them to processor for postprocessing
result = processor.post_process_instance_segmentation(outputs, target_sizes=[image.size[::-1]])[0]
# we refer to the demo notebooks for visualization (see "Resources" section in the Mask2Former docs)
predicted_instance_map = result["segmentation"]

For more code examples, we refer to the documentation.

📄 License

The license for this model is other.