Learn about transformer networks, self-attention, multi-head attention, and spatiotemporal transformers in this course, focusing on their applications in computer vision and deep learning.

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DETR

Transformers

DETR2

This is a comprehensive course on vision transformers and their use cases in computer vision. You’ll begin by exploring the rise of transformers and attention mechanisms and their role in deep neural networks. 
You’ll gain insights into self-attention mechanisms, multi-head attention, and the pros and cons of transformers building a strong foundation. Next, you’ll discover how transformers reshape image analysis. Comparing self-attention with convolutional encoders and understanding spatial vs. channel vs. temporal attention, you’ll grasp nuances in applying transformer architectures to visual data. 

The course also explores spatiotemporal transformers, bridging the gap between static images and dynamic data. After completing this course, you’ll have the knowledge and skills to leverage transformer networks across diverse applications in deep learning and artificial intelligence.

Transformers for Computer Vision Applications

It aggregates pixels within a single spatial patch.

It focuses on the relationship between different channels.

It attends to two-dimensional spatial relations across the entire input.

It captures temporal relations between video frames.

What’s the purpose of spatial attention in the context of self-attention feature map generation?

What’s the purpose of spatial attention in the context of self-attention feature map generation?

$N\cdot H \cdot W$ (Batch size, height, width)

$T.N.H.W$ (Time steps, batch size, height, width)

$HW\cdot HW$ (Flattened height-width, flattened height-width)

In the context of temporal attention, what are the dimensions of the input feature maps?

In the context of temporal attention, what are the dimensions of the input feature maps?

Aggregation of pixels within a single spatial patch

What does a $T-by-T$ attention map represent in the case of temporal attention?

What does a <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>T</mi><mo>−</mo><mi>b</mi><mi>y</mi><mo>−</mo><mi>T</mi></mrow><annotation encoding="application/x-tex">T-by-T</annotation></semantics></math>T−by−T attention map represent in the case of temporal attention?

Global attention adapts its weights based on input values, while local attention uses static weights.

Global attention operates within a predefined local area, while local attention considers the entire feature map.

Global attention entails a large attention map and is memory-intensive, while local attention models relations within a specified neighborhood.

Global attention is computationally efficient, while local attention demands significant time and memory resources.

What’s the primary difference between global attention and local attention in the context of self-attention mechanisms?

What’s the primary difference between global attention and local attention in the context of self-attention mechanisms?

Local attention introduces dynamic weights, improving the efficiency of attention mechanisms.

Local attention reduces the computational burden by applying attention to each spatial location or patch.

Local attention is equivalent to fully connected layers, providing a comprehensive modeling of contextual information.

Local attention has a higher parameter count, making it suitable for complex vision tasks.

Why might local attention be recommended in computer vision applications?

Why might local attention be recommended in computer vision applications?

Criss-cross attention exhibits better performance only on small-scale datasets.

Criss-cross attention influences each pixel by considering all positions in the image.

Criss-cross attention reduces GPU memory usage significantly and has lower computational complexity.

Non-local blocks are more suitable for tasks requiring fine-grained feature relationships.

What’s a notable advantage of the criss-cross attention mechanism compared to non-local blocks?

What’s a notable advantage of the criss-cross attention mechanism compared to non-local blocks?

The trade-off between dynamic and static attention weights.

The trade-off between inductive bias and flexibility in modeling relationships.

The trade-off between local and global attention, where local attention sacrifices global relationships.

The trade-off between parameter count and inference costs in attention mechanisms.

What trade-off is highlighted when discussing attention mechanisms in computer vision?

What trade-off is highlighted when discussing attention mechanisms in computer vision?

Test your knowledge of self-attention, spatial and temporal attention, global vs. local attention, and advantages.

Introduction

Overview of Transformer Networks

Neural Machine Translation with a Transformer and Keras

Transformers in Computer Vision

Vision Transformer for Image Classification

Transformers in Image Classification

Fine-Tuning Vision Transformers for Image Classification

Transformers in Object Detection

Transformers in Semantic Segmentation

Spatio-Temporal Transformers

Object Detection with Vision Transformers

Wrap Up

Quiz: Attention in Computer Vision