The Face Detection Functions on Android PRADA - Android Dev at PicCollage

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Why FaceDetection is important?

Snapchat Snow

Because it’s funny

Never Alone

https://play.google.com/store/apps/details?id=com.cardinalblue.android.neveralone

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Before After

How to implement it on Android?

Assumption only discuss client-side calculation.

android.media.FaceDetector

http://developer.android.com/intl/zh-tw/reference/android/media/FaceDetector.html

android.media.FaceDetector.Face float getFaceDistance() void getMidPoint(PointF)

x

android.hardware.Camera.FaceDetectionListener

http://developer.android.com/intl/zh-tw/reference/android/hardware/Camera.FaceDetectionListener.html

Camera.Face PointF leftEye, rightEye, mouth Rect rect

x x

x

Google Mobile Vision SDK

Landmark

http://android-developers.blogspot.tw/2015/08/face-detection-in-google-play-services.html

gms.vision.face.Face List<Landmark>getLandmarks()

Smile Mode

gms.vision.face.Face float getIsLeftEyeOpenProbability() float getIsRightEyeOpenProbability() float getIsSmilingProbability()

Face Rotationgms.vision.face.Face float getEulerY() float getEulerZ()

It’s Beta Version

Samsung S4 didn’t work https://github.com/googlesamples/android-vision/issues/39

https://github.com/googlesamples/android-vision/issues/21Preview/Capture Resolution is bad

Open CV

You lost one man

Nobody Blink

?

OpenCV for Android

Sample CodecascadeFile = new File(cascadeDir, "lbpcascade_frontalface.xml"); nativeDetector = new DetectionBasedTracker( cascadeFile.getAbsolutePath(), 0); nativeDetector.setMinFaceSize(FACE_SIZE); MatOfRect faces = new MatOfRect(); nativeDetector.detect(PREVIEW_BUFFER, faces); Rect[] facesArray = faces.toArray();`

https://github.com/bearprada/android_camera_with_opencv_sample

Summarymedia.Face Camera.Face gms.vision.face Open CV

footprint 0MB 0MB ~85KB ~20MB💩

camera integration x 💩 o o o

customisable 🌟 🌟 🌟🌟 🌟🌟🌟

easy to use 🌟🌟🌟 🌟🌟🌟 🌟🌟 🌟

min-SDK version 1 14 💩 9 9

Information 🌟 🌟 🌟🌟 🌟🌟🌟

Thanks

Android Dev Intern

http://cardinalblue.com/jobs