Create README.md

Author: justin200914

README.md

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+# FaceLivenessDetection-Android
+
+## Introduction
+This demo showcases a 3D passive liveness detection technique for detecting spoofed faces. 
+
+In real-time, a single image captured from the Android camera computes a liveness score.
+
+## Try the APK
+
+You can test the demo APK by following the link below:
+
+https://drive.google.com/file/d/1U7-wHmRYb8VV32kOb6JdG_sdZA_3bSLe/view?usp=sharing
+
+## SDK License
+
+This project uses kby-ai's liveness detection SDK. The SDK requires a license per application ID.
+
+- The code below shows how to use the license: https://github.com/kby-ai/FaceLivenessDetection-Android/blob/e5ca47f69de1159db81ca68908e039c45c022f8b/app/src/main/java/com/kbyai/facelivedemo/CameraActivity.java#L69-L77
+
+- To request a license, please contact us:
+```
+Email: kbyai200914@gmail.com
+
+Skype: live:.cid.66e2522354b1049b
+
+Telegram: kbyai
+
+WahtsApp: +19092802609
+```
+
+## About SDK
+
+### Set up
+1. Copy the SDK (libfacesdk folder) to the root folder of your project.
+
+2. Add SDK to the project in settings.gradle
+```
+include ':libfacesdk'
+```
+
+3. Add dependency to your build.gradle
+```
+implementation project(path: ':libfacesdk')
+```
+
+### Initializing an SDK
+
+- Step One
+
+To begin, you need to activate the SDK using the license that you have received.
+```
+FaceSDK.setActivation("...")
+```
+
+If activation is successful, the return value will be SDK_SUCCESS. Otherwise, an error value will be returned.
+
+- Step Two
+
+After activation, call the SDK's initialization function.
+```
+FaceSDK.init(getAssets());
+```
+If initialization is successful, the return value will be SDK_SUCCESS. Otherwise, an error value will be returned.
+
+### Face Detection and Liveness Detection
+
+The FaceSDK offers a single function for detecting face and liveness detection, which can be used as follows:
+```
+FaceSDK.faceDetection(bitmap)
+```
+
+This function takes a single parameter, which is a bitmap object. The return value of the function is a list of FaceBox objects. Each FaceBox object contains the detected face rectangle, liveness score, and facial angles such as yaw, roll, and pitch.
+
+### Yuv to Bitmap
+The SDK provides a function called yuv2Bitmap, which converts a yuv frame to a bitmap. Since camera frames are typically in yuv format, this function is necessary to convert them to bitmaps. The usage of this function is as follows:
+```
+Bitmap bitmap = FaceSDK.yuv2Bitmap(nv21, image.getWidth(), image.getHeight(), 7);
+```
+The first parameter is an nv21 byte array containing the yuv data. 
+
+The second parameter is the width of the yuv frame, and the third parameter is its height. 
+
+The fourth parameter is the conversion mode, which is determined by the camera orientation.
+
+To determine the appropriate conversion mode, the following method can be used:
+```
+ 1        2       3      4         5            6           7          8
+
+ 888888  888888      88  88      8888888888  88                  88  8888888888
+ 88          88      88  88      88  88      88  88          88  88      88  88
+ 8888      8888    8888  8888    88          8888888888  8888888888          88
+ 88          88      88  88
+ 88          88  888888  888888
+```