FaceVerificationAndroid

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FaceVerificationAndroid

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Face verification with mxnet on android

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# Face Verification on Android

Face verification with mxnet on android

## Face Detection

OpenCV has an in-built Viola-Jones face detector which is used here to detect faces.

## Face Verification

I use pre-trained LightenedCNN as feature extractor.

![arch](http://img.blog.csdn.net/20161112165845008)

For more information please read the original paper

>https://arxiv.org/abs/1511.02683

My notes about this paper: [Lightened CNN](http://blog.csdn.net/tinyzhao/article/details/53127870)

The similarity metric is cosine similarity. The threshold should be about 0.5 ,and it should be adjusted according to specific applications.

## Face Alignment

I use VanillaCNN to detect facial landmarks. This step is crucial for high accuracy.

The paper can be found below

>http://www.openu.ac.il/home/hassner/projects/tcnn_landmarks/

My notes about this paper: [VanillaCNN](http://blog.csdn.net/tinyzhao/article/details/53559373)

The original implementation is based on Caffe, and I have turned it into MXNet model.You can get more details from below:

>https://github.com/flyingzhao/mxnet_VanillaCNN

The face is aligned by three landmarks including two inter-ocular points and one mid-mouth point. Affine transformation is applied with these three points.

## MXNet

[MXNet](http://mxnet.io/) is a great deep learning framework and can be used on Android efficiently and flexibly.

I have compiled mxnet for android with ndk-r13b. You can also refer to my blog for more details.

>http://blog.csdn.net/tinyzhao/article/details/53288102

You can also download compiled libmxnet_predict.so [here](https://github.com/flyingzhao/FaceVerificationAndroid/blob/master/app/src/main/jniLibs/armeabi/libmxnet_predict.so)

## Result

I test on my Xiaomi 4C (Snapdragon 808) and I get about 1.5s per image.

FaceVerificationAndroid

FaceVerificationAndroid Latest Version Download

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FaceVerificationAndroid

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