> For the complete documentation index, see [llms.txt](https://docs.recognito.vision/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.recognito.vision/how-to-implement-1-n-identification-with-recognito-sdk.md).

# How to implement 1:N identification with RECOGNITO SDK

Using RECOGNITO FaceSDK, you can implement 1:N face identification function.

## 1. Face Enrollment

<figure><img src="/files/mGLbkUxlwtuH2RnYhL7P" alt=""><figcaption><p>Face Enrollment Step</p></figcaption></figure>

## 2. Face Identification

<figure><img src="/files/TzDZlO55dOROMNu68csT" alt=""><figcaption><p>Face Identification Step</p></figcaption></figure>

### 1:N Face Template Matching Sample Code

{% code title="Android-FaceRecognition-FaceLivenessDetection/app/src/main/java/com/bio/facerecognition /CameraActivityKt.kt" %}

```kotlin
...
if(faceBoxes.size > 0) {
    val faceBox = faceBoxes[0]
    if (faceBox.liveness > SettingsActivity.getLivenessThreshold(context)) {
        val templates = FaceSDK.templateExtraction(bitmap, faceBox)

        var maxSimiarlity = 0f
        var maximiarlityPerson: Person? = null
        for (person in DBManager.personList) {
            val similarity = FaceSDK.similarityCalculation(templates, person.templates)
            if (similarity > maxSimiarlity) {
                maxSimiarlity = similarity
                maximiarlityPerson = person
            }
        }
        if (maxSimiarlity > SettingsActivity.getMatchThreshold(context)) {
            recognized = true
            val identifiedPerson = maximiarlityPerson
            val identifiedSimilarity = maxSimiarlity

            runOnUiThread {
                val faceImage = Utils.cropFace(bitmap, faceBox)
                val intent = Intent(context, ResultActivity::class.java)
                intent.putExtra("identified_face", faceImage)
                intent.putExtra("enrolled_face", identifiedPerson!!.face)
                intent.putExtra("identified_name", identifiedPerson!!.name)
                intent.putExtra("similarity", identifiedSimilarity)
                intent.putExtra("liveness", faceBox.liveness)
                intent.putExtra("yaw", faceBox.yaw)
                intent.putExtra("roll", faceBox.roll)
                intent.putExtra("pitch", faceBox.pitch)
                startActivity(intent)
            }
        }
    }
}
```

{% endcode %}

## Examples

### - Linux 1:N Face Search Demo

{% embed url="<https://github.com/recognito-vision/Linux-FaceRecognition-FaceLivenessDetection/tree/main/Identification(1%3AN)-Demo>" %}

### - Window-Face SDK Video Surveillance Demo

{% content-ref url="/pages/6stv2ijfJ6cGEbebU0gP" %}
[Sample Application](/face-recognition-sdk/integration-guide/windows/sample-application.md)
{% endcontent-ref %}

### - Android-Face SDK Demo

{% content-ref url="/pages/Qz2IcmBxv25uBiCKrHJO" %}
[Sample Application](/face-recognition-sdk/integration-guide/android/sample-application.md)
{% endcontent-ref %}