How to Use Augmentor for Image Augmentation in Python

Jan 25, 2024 | Data Science

Augmentor is an innovative image augmentation library that assists machine learning model developers in creating diverse datasets. This guide will walk you through the steps to install and utilize Augmentor for your image enhancement needs.

Installation

To get started with Augmentor, you can install it via pip from your command line. Here is how you can do it:

python
pip install Augmentor

If you want to upgrade an existing installation, use this command:

python
pip install Augmentor --upgrade

Getting Started with Augmentor

The core functionality of Augmentor is to automate the image augmentation process to expand datasets, especially for neural networks. You start by creating a pipeline, which is essentially a series of operations you want to apply to your images.

Creating a Pipeline

To create an augmentation pipeline, follow these initial steps:

python
import Augmentor

# Initialize the pipeline with a path to your images
p = Augmentor.Pipeline(path_to_images)

Adding Operations

Once the pipeline is established, you can add various operations, such as rotation and zooming. Here’s an analogy to simplify this process: think of each operation as a different ingredient you add to a recipe; the more variety you add, the more flavorful (or diverse) the final dish (dataset) will be.

Example:

  • Rotating Images: You can rotate images to simulate different viewpoints.
  • python
    p.rotate(probability=0.7, max_left_rotation=10, max_right_rotation=10)
    
  • Zooming: Zoom into images for close-ups.
  • python
    p.zoom(probability=0.5, min_factor=1.1, max_factor=1.5)
    

Generating Augmented Images

When the operations are added, running the sample method can create your augmented dataset:

python
p.sample(10000)

This command generates 10,000 augmented images that will be saved in a directory named “output”.

Processing Images

If you want to process each image through the pipeline without creating new samples, you can use the process() method:

python
p.process()

Troubleshooting

  • Slow Generation Rates: If you notice that image generation is slow, especially for small images, you may disable multi-threading by passing multi_threaded=False as a parameter when sampling:
  • python
    p.sample(100, multi_threaded=False)
    
  • Not Seeing Augmented Images: Ensure that you’ve specified the correct path for your images and the output directory. Check your working directory for the output folder.
  • Library Compatibility: Make sure you’re using a compatible version of Python as listed in the requirements.

For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Advanced Features

Augmentor provides advanced features like:

  • Multi-threading for faster image generation.
  • Ground truth parallel augmentation for consistent training data.
  • Elastic distortions and various perspective transformations to create realistic datasets.

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.

Final Thoughts

With Augmentor, you can efficiently create augmented datasets tailored to your machine learning projects, enhancing model performance and generalization capabilities. Dive into Augmentor and watch your models soar!

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