albumentations README

The project's README from github.com/albumentations-team/albumentations. As one markdown file: README.md.

Albumentations

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License: MIT Gurubase

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⚠️ Important Notice: Albumentations is No Longer Maintained

This repository is no longer actively maintained. The last update was in June 2025, and no further bug fixes, features, or compatibility updates will be provided.

🚀 Introducing AlbumentationsX - The Future of Albumentations

All development has moved to AlbumentationsX, the next-generation successor to Albumentations.

Note: AlbumentationsX uses dual licensing (AGPL-3.0 / Commercial). The AGPL license has strict copyleft requirements - see details below.

Your Options Moving Forward

1. Continue Using Albumentations (MIT License)

Best for: Projects that work fine with the current version and don't need updates

2. Upgrade to AlbumentationsX (Dual Licensed)

Best for: Projects that need ongoing support, updates, and new features

⚠️ AGPL License Warning: The AGPL-3.0 license is NOT compatible with permissive licenses like MIT, Apache 2.0, or BSD. If your project uses any of these licenses, you CANNOT use the AGPL version of AlbumentationsX - you'll need a commercial license.

Migration is Simple

# Uninstall original
pip uninstall albumentations

# Install AlbumentationsX
pip install albumentationsx

That's it! Your existing code continues to work without any changes:

import albumentations as A  # Same import!

transform = A.Compose([
    A.RandomCrop(width=256, height=256),
    A.HorizontalFlip(p=0.5),
    A.RandomBrightnessContrast(p=0.2),
])

Learn More


Original Albumentations README

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Albumentations is a Python library for image augmentation. Image augmentation is used in deep learning and computer vision tasks to increase the quality of trained models. The purpose of image augmentation is to create new training samples from the existing data.

Here is an example of how you can apply some pixel-level augmentations from Albumentations to create new images from the original one: parrot

Why Albumentations

Table of contents

Authors

Current Maintainer

Vladimir I. Iglovikov | Kaggle Grandmaster

Emeritus Core Team Members

Mikhail Druzhinin | Kaggle Expert

Alex Parinov | Kaggle Master

Alexander Buslaev | Kaggle Master

Eugene Khvedchenya | Kaggle Grandmaster

Installation

Albumentations requires Python 3.9 or higher. To install the latest version from PyPI:

pip install -U albumentations

Other installation options are described in the documentation.

Documentation

The full documentation is available at https://albumentations.ai/docs/.

A simple example

import albumentations as A
import cv2

# Declare an augmentation pipeline
transform = A.Compose([
    A.RandomCrop(width=256, height=256),
    A.HorizontalFlip(p=0.5),
    A.RandomBrightnessContrast(p=0.2),
])

# Read an image with OpenCV and convert it to the RGB colorspace
image = cv2.imread("image.jpg")
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)

# Augment an image
transformed = transform(image=image)
transformed_image = transformed["image"]

Getting started

I am new to image augmentation

Please start with the introduction articles about why image augmentation is important and how it helps to build better models.

I want to use Albumentations for the specific task such as classification or segmentation

If you want to use Albumentations for a specific task such as classification, segmentation, or object detection, refer to the set of articles that has an in-depth description of this task. We also have a list of examples on applying Albumentations for different use cases.

I want to explore augmentations and see Albumentations in action

Check the online demo of the library. With it, you can apply augmentations to different images and see the result. Also, we have a list of all available augmentations and their targets.

Who is using Albumentations

See also

List of augmentations

Pixel-level transforms

Pixel-level transforms will change just an input image and will leave any additional targets such as masks, bounding boxes, and keypoints unchanged. For volumetric data (volumes and 3D masks), these transforms are applied independently to each slice along the Z-axis (depth dimension), maintaining consistency across the volume. The list of pixel-level transforms:

Spatial-level transforms

Spatial-level transforms will simultaneously change both an input image as well as additional targets such as masks, bounding boxes, and keypoints. For volumetric data (volumes and 3D masks), these transforms are applied independently to each slice along the Z-axis (depth dimension), maintaining consistency across the volume. The following table shows which additional targets are supported by each transform:

Transform Image Mask BBoxes Keypoints Volume Mask3D
Affine ✓ ✓ ✓ ✓ ✓ ✓
AtLeastOneBBoxRandomCrop ✓ ✓ ✓ ✓ ✓ ✓
BBoxSafeRandomCrop ✓ ✓ ✓ ✓ ✓ ✓
CenterCrop ✓ ✓ ✓ ✓ ✓ ✓
CoarseDropout ✓ ✓ ✓ ✓ ✓ ✓
ConstrainedCoarseDropout ✓ ✓ ✓ ✓ ✓ ✓
Crop ✓ ✓ ✓ ✓ ✓ ✓
CropAndPad ✓ ✓ ✓ ✓ ✓ ✓
CropNonEmptyMaskIfExists ✓ ✓ ✓ ✓ ✓ ✓
D4 ✓ ✓ ✓ ✓ ✓ ✓
ElasticTransform ✓ ✓

albumentations (albumentations-team/albumentations)

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What is this?Albumentations is a fast, flexible Python library for image augmentation used in training computer vision models, offering a huge set of pixel-level and spatial-level transforms for images, masks, bounding boxes, keypoints, and even 3D volumes.
Is it a library or a standalone app?It is a Python library you import into your training pipeline, not a standalone application.
How do I add it to a project?Install it with pip, then import it and build a composition of transforms to apply to your images, masks, bounding boxes, or keypoints.
Do I need PyTorch or TensorFlow to use it?The library itself is framework-agnostic (pure Python/NumPy-based transforms); it works with any image data regardless of whether you use PyTorch, TensorFlow, or another framework for training.
Is this project still maintained?No. The repository is no longer actively maintained as of June 2025, and no further bug fixes, features, or compatibility updates will be provided.
Who should actually use this versus the successor?Use original Albumentations only if your project already works fine with the current version and doesn't need fixes or new features; otherwise the README recommends migrating to AlbumentationsX for ongoing support.
What kinds of data can transforms be applied to besides plain images?Transforms support images, segmentation masks, bounding boxes, keypoints, and volumetric 3D data (volumes and 3D masks), applying consistently across depth slices for 3D data.
How many augmentation types does it offer?It includes dozens of pixel-level transforms (like Blur, CLAHE, GaussNoise, RandomRain) and dozens of spatial-level transforms (like Affine, CoarseDropout, CropAndPad, ElasticTransform) that can affect images, masks, bounding boxes, and keypoints together.
How do I migrate to AlbumentationsX if I need active support?The migration is designed to be a drop-in replacement: you simply pip install albumentationsx and your existing Albumentations code continues to work without changes.
Can I use AlbumentationsX for free in a commercial MIT-licensed project?No — the AGPL-3.0 option is only free for AGPL-licensed projects and is incompatible with permissive licenses like MIT, Apache, or BSD, so commercial or permissively-licensed projects need a paid commercial license.
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