Here are some links that I found on face recognition libraries.

 - Android&#39;s [FaceDetector.Face][1]
  - Tutorial: [Implementing Face Detection in Android][2]
 - [OpenCV Facerecog][3]




Image Identification links:

- [Moodstocks][4] 
- [Ltutech][5]


  [1]: http://developer.android.com/reference/android/media/FaceDetector.Face.html
  [2]: https://software.intel.com/en-us/blogs/2013/10/28/implementing-face-detection-in-android
  [3]: http://sites.google.com/site/elsamuko/c-cpp/opencv-facerecog
  [4]: https://moodstocks.com/
  [5]: http://www.ltutech.com/

You can try Microsoft&#39;s Face API. It can detect and identify people. learn more about face API [here][1].


  [1]: https://azure.microsoft.com/en-us/services/cognitive-services/face/

[macgyver][1] offers face detection programs via a simple to use API. 


The program below takes a reference to a public image and will return an array of the coordinates and dimensions of any faces detected in the image.

https://askmacgyver.com/explore/program/face-location/5w8J9u4z


  [1]: https://askmacgyver.com

You use class **media.FaceDetector** in android to detect face for free. 

This is an example of face detection: https://github.com/betri28/FaceDetectCamera

I am creating a web application, where you have to read a list of objects / entities from a DB and populate it in a JSF `&lt;h:selectOneMenu&gt;`. I am unable to code this. Can someone show me how to do it?

I know how to get a `List&lt;User&gt;` from the DB. What I need to know is, how to populate this list in a `&lt;h:selectOneMenu&gt;`.

    &lt;h:selectOneMenu value=&quot;#{bean.name}&quot;&gt;
        ...?
    &lt;/h:selectOneMenu&gt;


How to populate options of h:selectOneMenu from database?

I use the NSUserDefaults dictionary to store basic information such as high scores etc so that when the user closes the app data is not lost. Anyways I use:

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

to store data. If I wish to store a new high score for example then I would do:

    [prefs setInteger:1023 forKey:@&quot;highScore&quot;];
    [prefs synchronize];  //this is needed in case the app is closed. 

and later if I wish to retrieve the high score I would do:

    [prefs integerForKey:@&quot;highScore&quot;];


anyways the point is that I store a lot of other things because the `NSUserDefaults enable` you to store `booleans`, `integers`, `objects` etc.   what method would I have to execute to delete all keys so that NSUserDefaults becomes like the fist time I launch the app?

I am looking for something like:

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs deleteAllKeysAndObjectsInTheDictionary];

or maybe there is a way of getting all keys and I have to loop through each object but I don&#39;t know how to remove them. 


EDIT:


I have tried :

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [NSUserDefaults resetStandardUserDefaults];
    [prefs synchronize];

and I still am able to retrieve a high score....



Delete all keys from a NSUserDefaults dictionary iOS

Using Android, what are the open-source option for face recognition.


Open source face recognition for Android

<p>Using Android, what are the open-source option for face recognition.</p>


Are there currently (Java 6) things you can do in Java bytecode that you can&#39;t do from within the Java language?

I know both are Turing complete, so read &quot;can do&quot; as &quot;can do significantly faster/better, or just in a different way&quot;.

I&#39;m thinking of extra bytecodes like `invokedynamic`, which can&#39;t be generated using Java, except that specific one is for a future version.

Bytecode features not available in the Java language

Can [`@Component`][1], [`@Repository`][2] and [`@Service`][3] annotations be used interchangeably in Spring or do they provide any particular functionality besides acting as a notation device?

In other words, if I have a Service class and I change the annotation from `@Service` to `@Component`, will it still behave the same way? 

Or does the annotation also influence the behavior and functionality of the class?


  [1]: https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/stereotype/Component.html
  [2]: https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/stereotype/Repository.html
  [3]: https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/stereotype/Service.html

What&#39;s the difference between @Component, @Repository &amp; @Service annotations in Spring?

I just saw that a beta of Hibernate 4 was released. What&#39;s new in 4 compared to 3(.6)? I couldn&#39;t find this info in the beta announcement, nor when Googling the title of this question.

What&#39;s new in Hibernate 4?

I’m working with an existing schema that I’d rather not change.  The schema has a one-to-one relationship between tables Person and VitalStats, where Person has a primary key and VitalStats uses the same field as both its primary key and its foreign key to Person, meaning its value is the value of the corresponding PK of Person.

These records are created by external processes, and my JPA code never needs to update VitalStats.
For my object model I’d like my Person class to contain a VitalStats member, BUT:

When I try 

    @Entity
    public class Person{
        private long id;
        @Id
        public long getId(){ return id; }
    
        private VitalStats vs;
        @OneToOne(mappedBy = “person”)
        public VitalStats getVs() { return vs; }
    }
    
    @Entity
        public class VitalStats{
         private Person person;
        @OneToOne
        public Person getPerson() { return person; }
    }

I have the problem that VitalStats lacks an @Id, which doesn’t work for an @Entity.\

If I try

    @Id @OneToOne
    public Person getPerson() { return person; }

that solves the @Id problem but requires that Person be Serializable.  We’ll get back to that.

I could make VitalStats @Embeddable and connect it to Person via an @ElementCollection, but then it would have to be accessed as a collection, even though I know that there’s only one element.  Doable, but both a little bit annoying and a little bit confusing.

So what’s preventing me from just saying that Person implements Serializable?  Nothing, really, except that I like everything in my code to be there for a reason, and I can’t see any logic to this, which makes my code less readable.

In the meantime I just replaced the Person field in VitalStats with a long personId and made that VitalStats’s @Id, so now the @OneToOne works.

All of these solutions to what seems (to me) like a straightforward issue are a bit clunky, so I’m wondering whether I’m missing anything, or whether someone can at least explain to me why Person has to be Serializable.

TIA




JPA @OneToOne with Shared ID -- Can I do this Better?

[Primitive Data Types - oracle doc][1] says the range of **`long`** in Java is `-9,223,372,036,854,775,808` to `9,223,372,036,854,775,807`.
But when I do something like this in my eclipse

    long i = 12345678910;

it shows me &quot;`The literal 12345678910 of type int is out of range`&quot; error.

**There are 2 questions.**

1) How do I initialize the **`long`** with the value `12345678910`?

2) Are all numeric literals by default of type **`int`**? 


  [1]: http://download.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html

Initialize a long in Java

I want to remove the background drawable `@drawable/bg` programmatically.
Is there a way to do that? 

Currently, I have the following XML in my layout:

	&lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
	&lt;RelativeLayout
		android:id=&quot;@+id/widget29&quot;
		android:layout_width=&quot;fill_parent&quot;
		android:layout_height=&quot;fill_parent&quot;
		xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
		android:background=&quot;@drawable/bg&quot;&gt;

	&lt;/RelativeLayout&gt;


Remove background drawable programmatically in Android

I have a very long activity with a scrollview. It is a form with various fields that the user must fill in. I have a checkbox half way down my form, and when the user checks it I want to scroll to a specific part of the view. Is there any way to scroll to an EditText object (or any other view object) programmatically?

Also, I know this is possible using X and Y coords but I want to avoid doing this as the form may changed from user to user.

Is there a way to programmatically scroll a scroll view to a specific edit text?

I&#39;m wondering if this is actually a bug in the Android API:

I have a setup like so:

    ┌----┬---------┐
    |    |         |
    |  1 |    2    |
    |    |┌-------┐|
    |    ||       ||
    |    ||   3   ||
    └----┴┴-------┴┘

 1. Is a menu which loads fragment #2 (A search screen) in the right pane.
 2. Is a search screen which contains fragment #3, which is a result list.
 3. The result list is used in several places (including as a functioning high level fragment in it&#39;s own right).

This functionality works perfectly well on a phone (Where 1 &amp; 2 and 3 are `ActivityFragment`s). 

However, when I used this code:

		FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();		
		Fragment frag = new FragmentNumber2();
		if(toLoad != null) frag.setArguments(toLoad);
		transaction.replace(R.id.rightPane, frag);      
		transaction.commit();

Where `R.id.leftPane` and `R.id.rightPane` are `&lt;fragment&gt;`s in a horizontal linear layout.

It is my understanding that the above code removes the fragment which is resident and then replaces it with a new fragment. Brilliant... Obviously that isn&#39;t what happens because when this code runs the second time you get the following exception:

    07-27 15:22:55.940: ERROR/AndroidRuntime(8105): Caused by: java.lang.IllegalArgumentException: Binary XML file line #57: Duplicate id 0x7f080024, tag null, or parent id 0x0 with another fragment for FragmentNumber3

This is caused because the the container for FragmentNumber3 has been duplicated and it no longer has a unique ID. The initial Fragment hasn&#39;t been destroyed (?) before the new one is added (in my mind that means it hasn&#39;t been *replaced*).

Can someone tell me if this is possible ([this answer](https://stackoverflow.com/questions/5268361/fragments-in-action-bar-tab-fragments/5280000#5280000) suggests it isn&#39;t) or is it a bug?


Fragments within Fragments

This is a general question, but particularly I am interested in it&#39;s use for Android. What is a keystore file, and what is it used for?

Can multiple Android applications use the same keystore to sign their application (what exactly does it mean to &quot;sign&quot; an .apk?), and what are the implications (if any) of this?

What is Android keystore file, and what is it used for?

I observed that when i use Logcat with Eclipse with ADT for Android, I get messages from many other applications as well. Is there a way to filter this and show only messages from my own application only.


Filter LogCat to get only the messages from My Application in Android?

There is not enough info about camera2 face detection mechanism. I used the Camera2 sample from Google: [https://github.com/android/camera-samples][1]

I set face detection mode to FULL.

    mPreviewRequestBuilder.set(CaptureRequest.STATISTICS_FACE_DETECT_MODE,
                                        CameraMetadata.STATISTICS_FACE_DETECT_MODE_FULL);

Also, I checked 

`STATISTICS_INFO_MAX_FACE_COUNT` and `STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES`:

    int max_count = characteristics.get(
    CameraCharacteristics.STATISTICS_INFO_MAX_FACE_COUNT);
    int modes [] = characteristics.get(
    CameraCharacteristics.STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES);
**Output**: *maxCount : 5 , modes : [0, 2]* 

My CaptureCallback:

     private CameraCaptureSession.CaptureCallback mCaptureCallback
     = new CameraCaptureSession.CaptureCallback() {

        private void process(CaptureResult result) {
                    Integer mode = result.get(CaptureResult.STATISTICS_FACE_DETECT_MODE);
                    Face [] faces = result.get(CaptureResult.STATISTICS_FACES);
                    if(faces != null &amp;&amp; mode != null)
                        Log.e(&quot;tag&quot;, &quot;faces : &quot; + faces.length + &quot; , mode : &quot; + mode ); 
        }

        @Override
        public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request,
                                        CaptureResult partialResult) {
            process(partialResult);
        }

        @Override
        public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
                                       TotalCaptureResult result) {
            process(result);
        }
**Output**: *faces : 0 , mode : 2* 

     public static final int STATISTICS_FACE_DETECT_MODE_FULL = 2;

Faces length is constantly 0. Looks like it doesn&#39;t detect a face properly or I missed something.

I know the approach with [FaceDetector][2]. I just wanted to check how it works with the new camera2 [Face][3].


  [1]: https://github.com/android/camera-samples
  [2]: https://developer.android.com/reference/android/media/FaceDetector.html
  [3]: https://developer.android.com/reference/android/hardware/camera2/params/Face.html

Content Type	Original Author	Original Content on Stackoverflow
Question	Roshan Wijesena	View Question on Stackoverflow
Solution 1 - Java	A. Abiri	View Answer on Stackoverflow
Solution 2 - Java	VivekRajendran	View Answer on Stackoverflow
Solution 3 - Java	Timothy Moody	View Answer on Stackoverflow
Solution 4 - Java	Minh Tri Nguyen	View Answer on Stackoverflow

Open source face recognition for Android

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Solution 4 - Java

Delete all keys from a NSUserDefaults dictionary iOS

How to populate options of h:selectOneMenu from database?

Attributions