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README

          

# InsightFace in OneFlow

[English](README.md) **|** [简体中文](README_CH.md)

It introduces how to train InsightFace in OneFlow, and do verification over the validation datasets via the well-toned networks.

## Contents

\- [InsightFace in OneFlow](#insightface-in-oneflow)

\- [Contents](#contents)

\- [Background](#background)

\- [InsightFace opensource project](#insightface-opensource-project)

\- [Implementation in OneFlow](#implementation-in-oneflow)

\- [Preparations](#preparations)

\- [Install OneFlow](#install-oneflow)

\- [Data preparations](#data-preparations)

\- [1. Download datasets](#1-download-datasets)

\- [2. Transformation from MS1M recordio to OFRecord](#2-transformation-from-ms1m-recordio-to-ofrecord)

\- [Pretrained model](#Pretrained-model)

\- [Training and verification](#training-and-verification)

\- [Training](#training)

\- [Varification](#varification)

\- [Benchmark](#benchmark)

## Background

### InsightFace opensource project

[InsightFace](https://github.com/deepinsight/insightface) is an open-source 2D&3D deep face analysis toolbox, mainly based on MXNet.

In InsightFace, it supports:

- Datasets typically used for face recognition, such as CASIA-Webface、MS1M、VGG2(Provided with the form of a binary file which could run in MXNet, [here](https://github.com/deepinsight/insightface/wiki/Dataset-Zoo) is more details about the datasets and how to download.

* Backbones of ResNet, MobilefaceNet, InceptionResNet_v2, and other deep-learning networks to apply in facial recognition.

* Implementation of different loss functions, including SphereFace Loss、Softmax Loss、SphereFace Loss, etc.

### Implementation in OneFlow

Based upon the currently existing work of Insightface, OneFlow ported basic models from it, and now OneFlow supports:

- Training datasets of MS1M、Glint360k, and validation datasets of Lfw、Cfp_fp and Agedb_30, scripts for training and validating.

- Backbones of ResNet100 and MobileFaceNet to recognize faces.

- Loss function, e.g. Softmax Loss and Margin Softmax Loss(including Arcface、Cosface and Combined Loss).

- Model parallelism and [Partial FC](https://github.com/deepinsight/insightface/tree/760d6de043d7f654c5963391271f215dab461547/recognition/partial_fc#partial-fc) optimization.

- Model transformation via MXNet.

To be coming further:

- Additional datasets transformation.

- Plentiful backbones.

- Full-scale loss functions implementation.

- Incremental tutorial on the distributed configuration.

This project is open for every developer to PR, new implementation and animated discussion will be most welcome.

## Preparations

First of all, before execution, please make sure that:

1. Install OneFlow

2. Prepare training and validation datasets in form of OFRecord.

### Install OneFlow

According to steps in [Install OneFlow](https://github.com/Oneflow-Inc/oneflow#install-oneflow) install the newest release master whl packages.

```
python3 -m pip install --find-links https://release.oneflow.info oneflow_cu102 --user
```

### Data preparations

According to [Load and Prepare OFRecord Datasets](https://docs.oneflow.org/en/extended_topics/how_to_make_ofdataset.html), datasets should be converted into the form of OFREcord, to test InsightFace.

It has provided a set of datasets related to face recognition tasks, which have been pre-processed via face alignment or other processions already in [InsightFace](https://github.com/deepinsight/insightface). The corresponding datasets could be downloaded from [here](https://github.com/deepinsight/insightface/wiki/Dataset-Zoo) and should be converted into OFRecord, which performs better in OneFlow. Considering the cumbersome steps, it is suggested to download converted OFrecord datasets:

[MS1M-ArcFace(face_emore)](http://oneflow-public.oss-cn-beijing.aliyuncs.com/face_dataset/train_ofrecord.tar.gz)

[MS1MV3](https://oneflow-public.oss-cn-beijing.aliyuncs.com/facedata/MS1V3/oneflow/ms1m-retinaface-t1.zip)

It illustrates how to convert downloaded datasets into OFRecords, and take MS1M-ArcFace as an example in the following.

#### 1. Download datasets

The structure of the downloaded MS1M-ArcFace is shown as follown:

```
faces_emore/

​ train.idx

​ train.rec

​ property

​ lfw.bin

​ cfp_fp.bin

​ agedb_30.bin
```

The first three files are MXNet recordio format files of MS1M training dataset, the last three `.bin` files are different validation datasets.

#### 2. Transformation from MS1M recordio to OFRecord
Only need to execute 2.1 or 2.2
2.1 Use Python scripts directly

Run
```
python tools/mx_recordio_2_ofrecord_shuffled_npart.py --data_dir datasets/faces_emore --output_filepath faces_emore/ofrecord/train --part_num 16
```
And you will get the number of `part_num` parts of OFRecord, it's 16 parts in this example, it showed like this
```
tree ofrecord/test/
ofrecord/test/
|-- _SUCCESS
|-- part-00000
|-- part-00001
|-- part-00002
|-- part-00003
|-- part-00004
|-- part-00005
|-- part-00006
|-- part-00007
|-- part-00008
|-- part-00009
|-- part-00010
|-- part-00011
|-- part-00012
|-- part-00013
|-- part-00014
`-- part-00015

0 directories, 17 files
```

2.2 Use Python scripts + Spark Shuffle + Spark partition

Run

```
python tools/dataset_convert/mx_recordio_2_ofrecord.py --data_dir datasets/faces_emore --output_filepath faces_emore/ofrecord/train
```

And you will get one part of OFRecord(`part-0`) with all data in this way. Then you should use Spark to shuffle and partition.
1. Get jar package available
You can download Spark-oneflow-connector-assembly-0.1.0.jar via [Github](https://github.com/Oneflow-Inc/spark-oneflow-connector) or [OSS](https://oneflow-public.oss-cn-beijing.aliyuncs.com/spark-oneflow-connector/spark-oneflow-connector-assembly-0.1.1.jar)

2. Run in Spark
Assign that you have already installed and configured Spark.
Run
```
//Start Spark
./Spark-2.4.3-bin-hadoop2.7/bin/Spark-shell --jars ~/Spark-oneflow-connector-assembly-0.1.0.jar --driver-memory=64G --conf Spark.local.dir=/tmp/
// shuffle and partition in 16 parts
import org.oneflow.Spark.functions._
Spark.read.chunk("data_path").shuffle().repartition(16).write.chunk("new_data_path")
sc.formatFilenameAsOneflowStyle("new_data_path")
```
Hence you will get 16 parts of OFRecords, it shown like this
```
tree ofrecord/test/
ofrecord/test/
|-- _SUCCESS
|-- part-00000
|-- part-00001
|-- part-00002
|-- part-00003
|-- part-00004
|-- part-00005
|-- part-00006
|-- part-00007
|-- part-00008
|-- part-00009
|-- part-00010
|-- part-00011
|-- part-00012
|-- part-00013
|-- part-00014
`-- part-00015

0 directories, 17 files
```

## Pretrained model

The accuracy comparison of OneFlow and MXNet pretrained models on the verification set of the 1:1 verification accuracy on insightface recognition test (IFRT) are as follows:

| **Framework** | **African** | **Caucasian** | **Indian** | **Asian** | **All** |
| ------------- | ----------- | ------------- | ---------- | --------- | ------- |
| OneFlow | 90.4076 | 94.583 | 93.702 | 68.754 | 89.684 |
| MXNet | 90.45 | 94.60 | 93.96 | 63.91 | 88.23 |

The download link of the OneFlow pretrain model:[of_005_model.tar.gz](http://oneflow-public.oss-cn-beijing.aliyuncs.com/face_dataset/pretrained_model/of_glint360k_partial_fc/of_005_model.tar.gz)

We also provide the MXNet model which converted from OneFlow:[of_to_mxnet_model_005.tar.gz](http://oneflow-public.oss-cn-beijing.aliyuncs.com/face_dataset/pretrained_model/of_2_mxnet_glint360k_partial_fc/of_to_mxnet_model_005.tar.gz)

## OneFLow2ONNX

```
pip install oneflow-onnx==0.3.4
./convert.sh
```

## Training and verification

### Training

To reduce the usage cost of user, OneFlow draws close the scripts to Torch style, you can directly modify parameters via configs/*.py

```
./run.sh
```

### Varification

Moreover, OneFlow offers a validation script to do verification separately, val.py, which facilitates you to check the precision of the pre-training model saved.

```
./val.sh

```

## Benchmark

### Training Speed Benchmark

#### Face_emore Dataset & FP32

| Backbone | GPU | model_parallel | partial_fc | BatchSize / it | Throughput img / sec |
| -------- | ------------------------ | -------------- | ---------- | -------------- | -------------------- |
| R100 | 8 * Tesla V100-SXM2-16GB | False | False | 64 | 1836.8 |
| R100 | 8 * Tesla V100-SXM2-16GB | True | False | 64 | 1854.15 |
| R100 | 8 * Tesla V100-SXM2-16GB | True | True | 64 | 1872.81 |
| R100 | 8 * Tesla V100-SXM2-16GB | False | False | 96(Max) | 1931.76 |
| R100 | 8 * Tesla V100-SXM2-16GB | True | False | 115(Max) | 1921.87 |
| R100 | 8 * Tesla V100-SXM2-16GB | True | True | 120(Max) | 1962.76 |
| Y1 | 8 * Tesla V100-SXM2-16GB | False | False | 256 | 14298.02 |
| Y1 | 8 * Tesla V100-SXM2-16GB | True | False | 256 | 14049.75 |
| Y1 | 8 * Tesla V100-SXM2-16GB | False | False | 350(Max) | 14756.03 |
| Y1 | 8 * Tesla V100-SXM2-16GB | True | True | 400(Max) | 14436.38 |

#### Glint360k Dataset & FP32

| Backbone | GPU | partial_fc sample_ratio | BatchSize / it | Throughput img / sec |
| -------- | ------------------------ | ----------------------- | -------------- | -------------------- |
| R100 | 8 * Tesla V100-SXM2-16GB | 0.1 | 64 | 1858.57 |
| R100 | 8 * Tesla V100-SXM2-16GB | 0.1 | 115 | 1933.88 |

### Evaluation on Lfw, Cfp_fp, Agedb_30

- Data Parallelism

| Backbone | Dataset | Lfw | Cfp_fp | Agedb_30 |
| ------------- | ------- | ------ | ------ | -------- |
| R100 | MS1M | 99.717 | 98.643 | 98.150 |
| MobileFaceNet | MS1M | 99.5 | 92.657 | 95.6 |

- Model Parallelism

| Backbone | Dataset | Lfw | Cfp_fp | Agedb_30 |
| ------------- | ------- | ------ | ------ | -------- |
| R100 | MS1M | 99.733 | 98.329 | 98.033 |
| MobileFaceNet | MS1M | 99.483 | 93.457 | 95.7 |

- Partial FC

| Backbone | Dataset | Lfw | Cfp_fp | Agedb_30 |
| -------- | ------- | ------ | ------ | -------- |
| R100 | MS1M | 99.817 | 98.443 | 98.217 |

### Evaluation on IFRT

r denotes the sampling rate of negative class centers.

| Backbone | Dataset | African | Caucasian | Indian | Asian | ALL |
| -------- | -------------------- | ------- | --------- | ------ | ------ | ------ |
| R100 | **Glint360k**(r=0.1) | 90.4076 | 94.583 | 93.702 | 68.754 | 89.684 |

### Max num_classses

| node_num | gpu_num_per_node | batch_size_per_device | fp16 | Model Parallel | Partial FC | num_classes |
| -------- | ---------------- | --------------------- | ---- | -------------- | ---------- | ----------- |
| 1 | 1 | 64 | True | True | True | 2000000 |
| 1 | 8 | 64 | True | True | True | 13500000 |

More test details could refer to [OneFlow DLPerf](https://github.com/Oneflow-Inc/DLPerf#insightface).