go-face

go-face implements face recognition for Go using dlib, a
popular machine learning toolkit. Read
Face recognition with Go
article for some background details if you're new to
FaceNet concept.

Requirements

To compile go-face you need to have dlib (>= 19.10) and libjpeg development
packages installed.

Ubuntu 16.04, Ubuntu 18.04

You may use dlib PPA
which contains latest dlib package compiled with Intel MKL support:

sudo add-apt-repository ppa:kagamih/dlib
sudo apt-get update
sudo apt-get install libdlib-dev libjpeg-turbo8-dev

Ubuntu 18.10+, Debian sid

Latest versions of Ubuntu and Debian provide suitable dlib package so just run:

# Ubuntu
sudo apt-get install libdlib-dev libopenblas-dev libjpeg-turbo8-dev
# Debian
sudo apt-get install libdlib-dev libopenblas-dev libjpeg62-turbo-dev

ONLY FOR UBUNTU 18.10+ AND DEBIAN SID:
It won't install pkgconfig metadata file so create one in
/usr/local/lib/pkgconfig/dlib-1.pc with the following content:

libdir=/usr/lib/x86_64-linux-gnu
includedir=/usr/include

Name: dlib
Description: Numerical and networking C++ library
Version: 19.10.0
Libs: -L${libdir} -ldlib -lblas -llapack
Cflags: -I${includedir}
Requires:

macOS

Make sure you have Homebrew installed.

brew install pkg-config dlib
sed -i '' 's/^Libs: .*/& -lblas -llapack/' /usr/local/lib/pkgconfig/dlib-1.pc

Windows

Make sure you have MSYS2 installed.

1. Run MSYS2 MSYS shell from Start menu
2. Run pacman -Syu and if it asks you to close the shell do that
3. Run pacman -Syu again
4. Run pacman -S mingw-w64-x86_64-gcc mingw-w64-x86_64-dlib mingw-w64-x86_64-pkg-config
6. If you already have Go and Git installed and available in PATH uncomment
   set MSYS2_PATH_TYPE=inherit line in msys2_shell.cmd located in MSYS2
   installation folder
7. Otherwise run pacman -S mingw-w64-x86_64-go git
8. Run MSYS2 MinGW 64-bit shell from Start menu to compile and use go-face

Other systems

Try to install dlib/libjpeg with package manager of your distribution or
compile from sources. Note that go-face won't
work with old packages of dlib such as libdlib18. Alternatively create issue
with the name of your system and someone might help you with the installation
process.

Models

Currently shape_predictor_5_face_landmarks.dat, mmod_human_face_detector.dat and
dlib_face_recognition_resnet_model_v1.dat are required. You may download them
from dlib-models repo:

mkdir models && cd models
wget https://github.com/davisking/dlib-models/raw/master/shape_predictor_5_face_landmarks.dat.bz2
bunzip2 shape_predictor_5_face_landmarks.dat.bz2
wget https://github.com/davisking/dlib-models/raw/master/dlib_face_recognition_resnet_model_v1.dat.bz2
bunzip2 dlib_face_recognition_resnet_model_v1.dat.bz2
wget https://github.com/davisking/dlib-models/raw/master/mmod_human_face_detector.dat.bz2
bunzip2 mmod_human_face_detector.dat.bz2

Usage

To use go-face in your Go code:

import "github.com/Kagami/go-face"

To install go-face in your $GOPATH:

go get github.com/Kagami/go-face

For further details see GoDoc documentation.

Example

package main

import (
	"fmt"
	"log"
	"path/filepath"

	"github.com/Kagami/go-face"
)

// Path to directory with models and test images. Here it's assumed it
// points to the <https://github.com/Kagami/go-face-testdata> clone.
const dataDir = "testdata"

// This example shows the basic usage of the package: create an
// recognizer, recognize faces, classify them using few known ones.
func main() {
	// Init the recognizer.
	rec, err := face.NewRecognizer(dataDir)
	if err != nil {
		log.Fatalf("Can't init face recognizer: %v", err)
	}
	// Free the resources when you're finished.
	defer rec.Close()

	// Test image with 10 faces.
	testImagePristin := filepath.Join(dataDir, "pristin.jpg")
	// Recognize faces on that image.
	faces, err := rec.RecognizeFile(testImagePristin)
	if err != nil {
		log.Fatalf("Can't recognize: %v", err)
	}
	if len(faces) != 10 {
		log.Fatalf("Wrong number of faces")
	}

	// Fill known samples. In the real world you would use a lot of images
	// for each person to get better classification results but in our
	// example we just get them from one big image.
	var samples []face.Descriptor
	var cats []int32
	for i, f := range faces {
		samples = append(samples, f.Descriptor)
		// Each face is unique on that image so goes to its own category.
		cats = append(cats, int32(i))
	}
	// Name the categories, i.e. people on the image.
	labels := []string{
		"Sungyeon", "Yehana", "Roa", "Eunwoo", "Xiyeon",
		"Kyulkyung", "Nayoung", "Rena", "Kyla", "Yuha",
	}
	// Pass samples to the recognizer.
	rec.SetSamples(samples, cats)

	// Now let's try to classify some not yet known image.
	testImageNayoung := filepath.Join(dataDir, "nayoung.jpg")
	nayoungFace, err := rec.RecognizeSingleFile(testImageNayoung)
	if err != nil {
		log.Fatalf("Can't recognize: %v", err)
	}
	if nayoungFace == nil {
		log.Fatalf("Not a single face on the image")
	}
	catID := rec.Classify(nayoungFace.Descriptor)
	if catID < 0 {
		log.Fatalf("Can't classify")
	}
	// Finally print the classified label. It should be "Nayoung".
	fmt.Println(labels[catID])
}

Run with:

mkdir -p ~/go && cd ~/go  # Or cd to your $GOPATH
mkdir -p src/go-face-example && cd src/go-face-example
git clone https://github.com/Kagami/go-face-testdata testdata
edit main.go  # Paste example code
go get && go run main.go

Test

To fetch test data and run tests:

make test

FAQ

How to improve recognition accuracy

There are few suggestions:

• Try CNN recognizing
• Try different tolerance values of ClassifyThreshold
• Try different size/padding/jittering values of NewRecognizerWithConfig
• Provide more samples of each category to SetSamples if possible
• Implement better classify heuristics (see classify.cc)
• Train network (dlib_face_recognition_resnet_model_v1.dat) on your own test data

License

go-face is licensed under CC0.