Swin Base Patch4 Window12 384

Hierarchical vision transformer

Have you ever wondered how AI models can efficiently process images? The Swin Transformer is a type of Vision Transformer that builds hierarchical feature maps by merging image patches in deeper layers. This unique approach allows it to have linear computation complexity to input image size, making it faster and more efficient than previous vision Transformers. With its ability to serve as a general-purpose backbone for both image classification and dense recognition tasks, the Swin Transformer is a remarkable model that can be used for a wide range of applications. But what really sets it apart is its ability to process images at a higher resolution, such as 384x384, while maintaining its efficiency. So, how can you use this model? Simply use the raw model for image classification, or explore fine-tuned versions on the model hub for specific tasks that interest you.

Microsoft apache-2.0 Updated 3 years ago

Table of Contents

Model Overview

The Swin Transformer model is a type of Vision Transformer that helps computers understand images. It’s like a super-smart pair of eyes that can look at a picture and figure out what’s in it.

Capabilities

This model is capable of understanding images in a way that’s different from other models. It can focus on small parts of the image, rather than looking at the whole thing at once. This makes it really good at understanding images that have a lot of details, like pictures of animals or objects.

You can use this model for a variety of tasks, such as:

  • Image classification: The model can look at an image and tell you what’s in it, like a picture of a cat or a dog.
  • Object detection: The model can find specific objects within an image, like a car or a person.
  • Image segmentation: The model can break down an image into its individual parts, like a picture of a tree with separate branches and leaves.

Performance

This model has shown remarkable performance in various tasks. Let’s dive into its speed, accuracy, and efficiency.

Speed

The model is designed to be efficient, with linear computation complexity to input image size. This means it can process images quickly, even at high resolutions. For example, it can classify an image from the COCO 2017 dataset into one of the 1,000 ImageNet classes in a matter of seconds.

Accuracy

The model has achieved high accuracy in image classification tasks, particularly when compared to other models like ==Vision Transformers==. Its hierarchical feature maps and local window self-attention mechanism allow it to capture detailed information from images, leading to more accurate predictions.

Efficiency

One of the key advantages of this model is its efficiency. Unlike ==Other Vision Transformers==, which have quadratic computation complexity to input image size, this model can process images quickly and efficiently, even at high resolutions. This makes it a great choice for applications where speed and accuracy are crucial.

Real-World Applications

This model can be used for a variety of tasks, including:

  • Image classification
  • Object detection
  • Segmentation

Its efficiency and accuracy make it a great choice for applications where speed and accuracy are crucial, such as:

  • Self-driving cars
  • Medical image analysis
  • Surveillance systems
Examples
Classify this image: http://images.cocodataset.org/val2017/000000039769.jpg Predicted class: potted plant
What are the main differences between Swin Transformer and other Vision Transformers? Swin Transformer produces hierarchical feature maps and has linear computation complexity to input image size due to computation of self-attention only within each local window.
Can you use Swin Transformer for tasks other than image classification? Yes, Swin Transformer can serve as a general-purpose backbone for both image classification and dense recognition tasks.

Here’s an example of how you can use this model to classify an image:

from transformers import AutoFeatureExtractor, SwinForImageClassification
from PIL import Image
import requests

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

feature_extractor = AutoFeatureExtractor.from_pretrained("microsoft/swin-base-patch4-window12-384")
model = SwinForImageClassification.from_pretrained("microsoft/swin-base-patch4-window12-384")

inputs = feature_extractor(images=image, return_tensors="pt")
outputs = model(**inputs)
logits = outputs.logits

# model predicts one of the 1000 ImageNet classes
predicted_class_idx = logits.argmax(-1).item()
print("Predicted class:", model.config.id2label[predicted_class_idx])

This code uses the Swin Transformer model to classify an image of a cat as one of the 1,000 ImageNet classes.

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