Face detection using Android camera.? - android

Is it possible to scan a passport image using mobile camera and save his details and later detect that person using an Android mobile camera and fetch his details ?(Face detection)

I'd suggest you to use OpenCV Recognition API.
This API can let you save face data of a person and then use it to match with the new face data that you can get.
There are two ways to go about it
Use OpenCV for Android
Use JavaCV
OpenCV for Android is more fully supported than JavaCV. Follow Google's instructions to install Eclipse, the Android SDK and NDK (don't forget the NDK!)
Afterwards, follow this tutorial to install openCV. Try out the sample applications.
Alternatively, you can try using JavaCV instead of OpenCV for Android. This means you won't need to setup the Android NDK. It also means you won't need to write any C++. I didn't try this. But I suspect it is easier.
The downside is: it doesn't support everything OpenCV does.

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Android face detection alternatives

I have sucesfully implemented face detection in my app using Android's Camera.FaceDetectionListener (following the Android Developers guide), but unfortunatelly some devices does not support this feature. Is there another way to achieve the same result?
I usually work with OpenCV to make image processing algorithms.
http://opencv.org/platforms/android.html
Its algorithms are much better than Android face detection, besides if you download the SDK you have a faceDetection example.
Here are the downloads:
http://opencv.org/downloads.html
The sdk, handles camera api 2, which it works at 30 fps, with a wrapper if you want to process video frames. Besides there are samples where you can mix Java OpenCV code with JNI code, to make so much faster your algorithm.
Unfortunately, these examples are made on Eclipse projects, but they are not difficult to merge into Android studio project.
I hope that these references are useful
Cheers.

Developing Face Recognition App

i'm new to developing android apps in general.
I'm trying to create an application that given a certain image it would detect faces and would give me the eye locations and other info.
I've done some research and i found some stuff such as, the android FaceDetector API and OpenCV.
Could anyone give me some advice on how to make an app like this or send me a link with any info related to this, all help would be great!
Thanks, Daniel.
I have worked with Face recognition for a while.
If you want to use OpenCV you could do a better effort searching in SO and you can found things like this one.
The best one for me is the SDK provide by lockheed martin... but it's too expensive :S for a single person.
Edited
"Face detection and face recognition are different things ;) Face detection tells you where is the face and face recognition tells you who's the owner of the face"
If you choose OpenCV, you can find full doc in official page.
I'm going to give you a overview :
You can use OpenCV in your app using "OpenCV Manager" or with "Static Initialization on OpenCV Android".
About the first one:
OpenCV Manager is an Android service targeted to manage OpenCV library binaries on end users devices. It allows sharing the OpenCV dynamic libraries between applications on the same device. The Manager provides the following benefits:
Less memory usage. All apps use the same binaries from service and do not keep native libs inside themselves;
Hardware specific optimizations for all supported platforms;
Trusted OpenCV library source. All packages with OpenCV are published on Google Play market;
Regular updates and bug fixes;
About the second one:
A complete tutorial using eclipse.
You might try the new Android face API. See the tutorial here about how to detect faces and facial landmarks:
https://developers.google.com/vision/detect-faces-tutorial
I explain how to do it in this article. I used a TensorFlow Lite with a MobileFaceNet implementation, achieving very accurate results and with surprisingly high speed.
You'll find the source code and an APK in this repo

Difference between writing OpenCV for Android(Mobile devices) and writing openCV for Desktop Application(OpenCV 2.4.3 usingC++)

I was doing face detection and recognition project.I am about to finish the application which does detection and recognition. I want to make this application portable like a one that works on Mobile devices. I am new to writing codes using OpenCV on Androids. What is the difference between OpenCV codes for Android phones and OpenCV written for Desktop application using C++ on Visual Studio like VS 2010 with Open CV 2.4.3?(What is the difference between Codes between OpenCV on Android and OpenCV for Desktop.Do they both use the same language?)
I am familiar with Android(basics) and true that Android applications are written with Java. And i read somewhere online that OpenCV native codes can be included to Android with Java Native Interface.
I am a bit confused here that can i use the code i have written using C++ Open CV for my Android Application with out modification.If not what Kind of modification do i have to make on my face detection and recognition using C++ for Desktop to make it work for Android phones?
First off, there exists an OpenCV4Android version of Android, with tutorials on how to use it.
Then, as you pointed out, you can code both in Java or C++ on Android. OpenCV4Android can be used in Java [1] or in C++ [2]. In your case, it would probably be more convenient to re-use your C++ code, using the Native Development Kit for Android. If you manage to use the NDK, you will be able to re-use your C++ code by calling it from your Android app.
Here are the few steps I would advise you to follow:
Read about the Native Development Kit
Read about the Java Native Interface
Try to create a sample Android app using C++ (You might find this quickstart tutorial useful)
Try to integrate OpenCV to your sample [2]
Include your existing C++ code in your sample
I hope it will help.
I used OpenCV on Android using both Java and C++. From my experience, I can suggest to use Native C++ code for image processing application. C++ codes are more efficient and can give more identical result as compared to Java code.
Although OpenCV has the Java version also, but in the back-end, it is using Native code for running Java.
The speed of execution in Native code will be much high as compared to Java code.

Include OpenCV in android application package

I need to work on detecting edges from an Image, I'm using Canny algorithm for that.
Since OpenCV for android is available 2.4.2 while i'm trying to run examples it says.
"OpenCV Manager is not installed, please try to install it." after install it from the market it is working fine.
But if i want the user's to install my application so that they don't have to install another .apk for using my application.
-> How to use openCV without without asking for another application i.e. manger should be pre installed.?
-> is there any way i can use Canny algorithm for edge detection without OpenCV any good angorithm tutorials for implementing in in android.?
You might find information about this on the OpenCV webpage. This said, this is deprecated and OpenCV advises not to do this in production. The manager actually allows the user to download the OpenCV library once for all. Then, your application will be much smaller!
About not using OpenCV, you can try FastCV (as Aaron suggested), but it seems overkill for your application (and it requires you to be familiar with NDK development). With OpenCV, in the other hand, you can code either in java (by the way, have a look at JavaCV) or using the NDK.
Finally, if you only need a Canny Edge detector and don't want to use a library, you can try to write it yourself. The related page on Wikipedia should be enough for this (I could do it a few years ago as an exercise).
Have you looked into Qualcomm's FastCV? It offers some of the more common image processing algorithms offered in libraries like OpenCV. They also have a pretty cool augmented reality API called Vuforia.
Fair warning, the support documentation isn't that great and it requires that you are familiar with NDK development.
https://developer.qualcomm.com/mobile-development/mobile-technologies/computer-vision-fastcv

Face recognition in Android without opencv

I wanted to develop a face recognition app in android. While searching, all i come up with is, the Opencv method, which i think is using C or C++. Can someone post the code or method for android? I am a newbie, so trying new stuff. Thanks!
OpenCV indeed uses C and C++ (and also Python), however you can try and use a java wrapper for the opencv library. Here is a nice wrapper.
If you have a newer phone/tablet, you can use the face recognition API in Android 14+. Check out Camera.Face and Camera.FaceDetectionListener
Also make sure you call: getMaxNumDetectedFaces to make sure you device supports the API.

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