Metadata-Version: 2.1
Name: pytorch-metric-learning
Version: 1.1.0.dev1
Summary: The easiest way to use deep metric learning in your application. Modular, flexible, and extensible. Written in PyTorch.
Home-page: https://github.com/KevinMusgrave/pytorch-metric-learning
Author: Kevin Musgrave
License: UNKNOWN
Description: <h1 align="center">
        <a href="https://github.com/KevinMusgrave/pytorch-metric-learning">
        <img alt="Logo" src="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/docs/imgs/Logo2.png">
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        </h2>
        <p align="center">
         <a href="https://badge.fury.io/py/pytorch-metric-learning">
             <img alt="PyPi version" src="https://badge.fury.io/py/pytorch-metric-learning.svg">
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         <a href="https://anaconda.org/metric-learning/pytorch-metric-learning">
             <img alt="Anaconda version" src="https://img.shields.io/conda/v/metric-learning/pytorch-metric-learning?color=bright-green">
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        <a href="https://github.com/KevinMusgrave/pytorch-metric-learning/commits/master">
             <img alt="Commit activity" src="https://img.shields.io/github/commit-activity/m/KevinMusgrave/pytorch-metric-learning">
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         <p align="center">
        <a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_losses.yml">
            <img alt="Losses unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/losses/badge.svg">
         </a>
        <a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_miners.yml">
            <img alt="Miners unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/miners/badge.svg">
         </a>
        	<a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_reducers.yml">
            <img alt="Reducers unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/reducers/badge.svg">
         </a>
        	<a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_regularizers.yml">
            <img alt="Regularizers unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/regularizers/badge.svg">
         </a>
        </p>
         <p align="center">
        	<a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_samplers.yml">
            <img alt="Samplers unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/samplers/badge.svg">
         </a>
        	<a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_testers.yml">
            <img alt="Testers unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/testers/badge.svg">
         </a>
        	<a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_trainers.yml">
            <img alt="Trainers unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/trainers/badge.svg">
         </a>
        	<a href="https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/.github/workflows/test_utils.yml">
            <img alt="Utils unit tests" src="https://github.com/KevinMusgrave/pytorch-metric-learning/workflows/utils/badge.svg">
         </a>
        </p>
        
        ## News
        
        **November 28**: v1.0.0 includes:
        - Reference embeddings for tuple losses
        - Efficient mode for DistributedLossWrapper
        - Customized k-nn functions for AccuracyCalculator
        - See the [release notes](https://github.com/KevinMusgrave/pytorch-metric-learning/releases/tag/v1.0.0)
        
        **May 9**: v0.9.99 includes:
        - [HierarchicalSampler](https://kevinmusgrave.github.io/pytorch-metric-learning/samplers/#hierarchicalsampler)
        - Improvements to logging, trainer key-verification, and InferenceModel
        - See the [release notes](https://github.com/KevinMusgrave/pytorch-metric-learning/releases/tag/v0.9.99)
        
        **April 2**: v0.9.98 includes:
        - [SupConLoss](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#supconloss)
        - A bug fix for compatibility with autocast
        - New behavior for the ```k``` parameter of AccuracyCalculator. (Apologies for the breaking change. I'm hoping to have things stable and following semantic versioning when v1.0 arrives.)
        - See the [release notes](https://github.com/KevinMusgrave/pytorch-metric-learning/releases/tag/v0.9.98)
        
        ## Documentation
        - [**View the documentation here**](https://kevinmusgrave.github.io/pytorch-metric-learning/)
        - [**View the installation instructions here**](https://github.com/KevinMusgrave/pytorch-metric-learning#installation)
        - [**View the available losses, miners etc. here**](https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/CONTENTS.md) 
        
        
        ## Google Colab Examples
        See the [examples folder](https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/examples/README.md) for notebooks you can download or run on Google Colab.
        
        
        ## PyTorch Metric Learning Overview
        This library contains 9 modules, each of which can be used independently within your existing codebase, or combined together for a complete train/test workflow.
        
        ![high_level_module_overview](docs/imgs/high_level_module_overview.png)
        
        
        
        ## How loss functions work
        
        ### Using losses and miners in your training loop
        Let’s initialize a plain [TripletMarginLoss](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#tripletmarginloss):
        ```python
        from pytorch_metric_learning import losses
        loss_func = losses.TripletMarginLoss()
        ```
        
        To compute the loss in your training loop, pass in the embeddings computed by your model, and the corresponding labels. The embeddings should have size (N, embedding_size), and the labels should have size (N), where N is the batch size.
        
        ```python
        # your training loop
        for i, (data, labels) in enumerate(dataloader):
        	optimizer.zero_grad()
        	embeddings = model(data)
        	loss = loss_func(embeddings, labels)
        	loss.backward()
        	optimizer.step()
        ```
        
        The TripletMarginLoss computes all possible triplets within the batch, based on the labels you pass into it. Anchor-positive pairs are formed by embeddings that share the same label, and anchor-negative pairs are formed by embeddings that have different labels. 
        
        Sometimes it can help to add a mining function:
        ```python
        from pytorch_metric_learning import miners, losses
        miner = miners.MultiSimilarityMiner()
        loss_func = losses.TripletMarginLoss()
        
        # your training loop
        for i, (data, labels) in enumerate(dataloader):
        	optimizer.zero_grad()
        	embeddings = model(data)
        	hard_pairs = miner(embeddings, labels)
        	loss = loss_func(embeddings, labels, hard_pairs)
        	loss.backward()
        	optimizer.step()
        ```
        In the above code, the miner finds positive and negative pairs that it thinks are particularly difficult. Note that even though the TripletMarginLoss operates on triplets, it’s still possible to pass in pairs. This is because the library automatically converts pairs to triplets and triplets to pairs, when necessary.
        
        ### Customizing loss functions
        Loss functions can be customized using [distances](https://kevinmusgrave.github.io/pytorch-metric-learning/distances/), [reducers](https://kevinmusgrave.github.io/pytorch-metric-learning/reducers/), and [regularizers](https://kevinmusgrave.github.io/pytorch-metric-learning/regularizers/). In the diagram below, a miner finds the indices of hard pairs within a batch. These are used to index into the distance matrix, computed by the distance object. For this diagram, the loss function is pair-based, so it computes a loss per pair. In addition, a regularizer has been supplied, so a regularization loss is computed for each embedding in the batch. The per-pair and per-element losses are passed to the reducer, which (in this diagram) only keeps losses with a high value. The averages are computed for the high-valued pair and element losses, and are then added together to obtain the final loss.
        
        ![high_level_loss_function_overview](docs/imgs/high_level_loss_function_overview.png)
        
        Now here's an example of a customized TripletMarginLoss:
        ```python
        from pytorch_metric_learning.distances import CosineSimilarity
        from pytorch_metric_learning.reducers import ThresholdReducer
        from pytorch_metric_learning.regularizers import LpRegularizer
        from pytorch_metric_learning import losses
        loss_func = losses.TripletMarginLoss(distance = CosineSimilarity(), 
        				     reducer = ThresholdReducer(high=0.3), 
        			 	     embedding_regularizer = LpRegularizer())
        ```
        This customized triplet loss has the following properties:
        
         - The loss will be computed using cosine similarity instead of Euclidean distance.
         - All triplet losses that are higher than 0.3 will be discarded.
         - The embeddings will be L2 regularized.  
        
        ### Using loss functions for unsupervised / self-supervised learning
        
        The TripletMarginLoss is an embedding-based or tuple-based loss. This means that internally, there is no real notion of "classes". Tuples (pairs or triplets) are formed at each iteration, based on the labels it receives. The labels don't have to represent classes. They simply need to indicate the positive and negative relationships between the embeddings. Thus, it is easy to use these loss functions for unsupervised or self-supervised learning. 
        
        For example, the code below is a simplified version of the augmentation strategy commonly used in self-supervision. The dataset does not come with any labels. Instead, the labels are created in the training loop, solely to indicate which embeddings are positive pairs.
        
        ```python
        # your training for-loop
        for i, data in enumerate(dataloader):
        	optimizer.zero_grad()
        	embeddings = your_model(data)
        	augmented = your_model(your_augmentation(data))
        	labels = torch.arange(embeddings.size(0))
        
        	embeddings = torch.cat([embeddings, augmented], dim=0)
        	labels = torch.cat([labels, labels], dim=0)
        
        	loss = loss_func(embeddings, labels)
        	loss.backward()
        	optimizer.step()
        ```
        
        If you're interested in [MoCo](https://arxiv.org/pdf/1911.05722.pdf)-style self-supervision, take a look at the [MoCo on CIFAR10](https://github.com/KevinMusgrave/pytorch-metric-learning/tree/master/examples#simple-examples) notebook. It uses CrossBatchMemory to implement the momentum encoder queue, which means you can use any tuple loss, and any tuple miner to extract hard samples from the queue.
        
        
        ## Highlights of the rest of the library
        
        - For a convenient way to train your model, take a look at the [trainers](https://kevinmusgrave.github.io/pytorch-metric-learning/trainers/).
        - Want to test your model's accuracy on a dataset? Try the [testers](https://kevinmusgrave.github.io/pytorch-metric-learning/testers/).
        - To compute the accuracy of an embedding space directly, use [AccuracyCalculator](https://kevinmusgrave.github.io/pytorch-metric-learning/accuracy_calculation/).
        
        If you're short of time and want a complete train/test workflow, check out the [example Google Colab notebooks](https://github.com/KevinMusgrave/pytorch-metric-learning/tree/master/examples).
        
        To learn more about all of the above, [see the documentation](https://kevinmusgrave.github.io/pytorch-metric-learning). 
        
        
        ## Installation
        
        ### Required PyTorch version
         - ```pytorch-metric-learning >= v0.9.90``` requires ```torch >= 1.6```
         - ```pytorch-metric-learning < v0.9.90``` doesn't have a version requirement, but was tested with ```torch >= 1.2```
        
        Other dependencies: ```numpy, scikit-learn, tqdm, torchvision```
        
        ### Pip
        ```
        pip install pytorch-metric-learning
        ```
        <details>
          <summary>Other installation options</summary>
        
        **To get the latest dev version**:
        ```
        pip install pytorch-metric-learning --pre
        ```
        
        **To install on Windows**:
        ```
        pip install torch===1.6.0 torchvision===0.7.0 -f https://download.pytorch.org/whl/torch_stable.html
        pip install pytorch-metric-learning
        ```
        
        **To install with evaluation and logging capabilities**
        
        (This will install the unofficial pypi version of faiss-gpu, plus record-keeper and tensorboard):
        ```
        pip install pytorch-metric-learning[with-hooks]
        ```
        
        **To install with evaluation and logging capabilities (CPU)**
        
        (This will install the unofficial pypi version of faiss-cpu, plus record-keeper and tensorboard):
        ```
        pip install pytorch-metric-learning[with-hooks-cpu]
        ```
        	
        ### Conda
        ```
        conda install pytorch-metric-learning -c metric-learning -c pytorch
        ```
        
        **To use the testing module, you'll need faiss, which can be installed via conda as well. See the [installation instructions for faiss](https://github.com/facebookresearch/faiss/blob/master/INSTALL.md).**
        
        </details>
        	
        
        
        ## Benchmark results
        See [powerful-benchmarker](https://github.com/KevinMusgrave/powerful-benchmarker/) to view benchmark results and to use the benchmarking tool.
        
        
        ## Development
        Development is done on the ```dev``` branch:
        ```
        git checkout dev
        ```
        
        Unit tests can be run with the default ```unittest``` library:
        ```bash
        python -m unittest discover
        ```
        
        You can specify the test datatypes and test device as environment variables. For example, to test using float32 and float64 on the CPU:
        ```bash
        TEST_DTYPES=float32,float64 TEST_DEVICE=cpu python -m unittest discover
        ```
        
        To run a single test file instead of the entire test suite, specify the file name:
        ```bash
        python -m unittest tests/losses/test_angular_loss.py
        ```
        
        Code is formatted using ```black``` and ```isort```:
        ```bash
        pip install black isort
        ./format_code.sh
        ```
        
        
        ## Acknowledgements
        
        ### Contributors
        Thanks to the contributors who made pull requests!
        
        | Contributor | Highlights |
        | -- | -- |
        |[marijnl](https://github.com/marijnl)| - [BatchEasyHardMiner](https://kevinmusgrave.github.io/pytorch-metric-learning/miners/#batcheasyhardminer) <br/> - [TwoStreamMetricLoss](https://kevinmusgrave.github.io/pytorch-metric-learning/trainers/#twostreammetricloss) <br/> - [GlobalTwoStreamEmbeddingSpaceTester](https://kevinmusgrave.github.io/pytorch-metric-learning/testers/#globaltwostreamembeddingspacetester) <br/> - [Example using trainers.TwoStreamMetricLoss](https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/examples/notebooks/TwoStreamMetricLoss.ipynb) |
        |[mlopezantequera](https://github.com/mlopezantequera) | - Made the [testers](https://kevinmusgrave.github.io/pytorch-metric-learning/testers) work on any combination of query and reference sets <br/> - Made [AccuracyCalculator](https://kevinmusgrave.github.io/pytorch-metric-learning/accuracy_calculation/) work with arbitrary label comparisons |
        | [elias-ramzi](https://github.com/elias-ramzi) | [HierarchicalSampler](https://kevinmusgrave.github.io/pytorch-metric-learning/samplers/#hierarchicalsampler) |
        | [fjsj](https://github.com/fjsj) | [SupConLoss](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#supconloss) |
        | [AlenUbuntu](https://github.com/AlenUbuntu) | [CircleLoss](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#circleloss) |
        | [wconnell](https://github.com/wconnell) | [Learning a scRNAseq Metric Embedding](https://github.com/KevinMusgrave/pytorch-metric-learning/blob/master/examples/notebooks/scRNAseq_MetricEmbedding.ipynb) |
        | [AlexSchuy](https://github.com/AlexSchuy) | optimized ```utils.loss_and_miner_utils.get_random_triplet_indices``` |
        | [JohnGiorgi](https://github.com/JohnGiorgi) | ```all_gather``` in [utils.distributed](https://kevinmusgrave.github.io/pytorch-metric-learning/distributed) |
        | [Hummer12007](https://github.com/Hummer12007) | ```utils.key_checker``` |
        | [vltanh](https://github.com/vltanh) | Made ```InferenceModel.train_indexer``` accept datasets |
        | [btseytlin](https://github.com/btseytlin) | ```get_nearest_neighbors``` in [InferenceModel](https://kevinmusgrave.github.io/pytorch-metric-learning/inference_models) |
        | [z1w](https://github.com/z1w) | |
        | [thinline72](https://github.com/thinline72) | |
        | [tpanum](https://github.com/tpanum) | |
        | [fralik](https://github.com/fralik) | |
        | [joaqo](https://github.com/joaqo) | |
        | [JoOkuma](https://github.com/JoOkuma) | |
        | [gkouros](https://github.com/gkouros) | |
        | [yutanakamura-tky](https://github.com/yutanakamura-tky) | |
        | [KinglittleQ](https://github.com/KinglittleQ) | |
        
        
        ### Facebook AI
        Thank you to [Ser-Nam Lim](https://research.fb.com/people/lim-ser-nam/) at [Facebook AI](https://ai.facebook.com/), and my research advisor, [Professor Serge Belongie](https://vision.cornell.edu/se3/people/serge-belongie/). This project began during my internship at Facebook AI where I received valuable feedback from Ser-Nam, and his team of computer vision and machine learning engineers and research scientists. In particular, thanks to [Ashish Shah](https://www.linkedin.com/in/ashish217/) and [Austin Reiter](https://www.linkedin.com/in/austin-reiter-3962aa7/) for reviewing my code during its early stages of development.
        
        ### Open-source repos
        This library contains code that has been adapted and modified from the following great open-source repos:
        - https://github.com/bnu-wangxun/Deep_Metric
        - https://github.com/chaoyuaw/incubator-mxnet/blob/master/example/gluon/embedding_learning
        - https://github.com/facebookresearch/deepcluster
        - https://github.com/geonm/proxy-anchor-loss
        - https://github.com/idstcv/SoftTriple
        - https://github.com/kunhe/FastAP-metric-learning
        - https://github.com/ronekko/deep_metric_learning
        - https://github.com/tjddus9597/Proxy-Anchor-CVPR2020
        - http://kaizhao.net/regularface
        
        ### Logo
        Thanks to [Jeff Musgrave](https://www.designgenius.ca/) for designing the logo.
        
        ## Citing this library
        If you'd like to cite pytorch-metric-learning in your paper, you can use this bibtex:
        ```latex
        @misc{musgrave2020pytorch,
            title={PyTorch Metric Learning},
            author={Kevin Musgrave and Serge Belongie and Ser-Nam Lim},
            year={2020},
            eprint={2008.09164},
            archivePrefix={arXiv},
            primaryClass={cs.CV}
        }
        ```
        
Platform: UNKNOWN
Classifier: Programming Language :: Python :: 3
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Requires-Python: >=3.0
Description-Content-Type: text/markdown
Provides-Extra: with-hooks
Provides-Extra: with-hooks-cpu
