Acuant iOS SDK v11.6.4

April 2024

See https://github.com/Acuant/iOSSDKV11/releases for release notes.

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License

This software is subject to Acuant's end user license agreement (EULA), which can be found here.

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Introduction

This document provides detailed information about the Acuant iOS SDK. The Acuant-recommended workflow is described below.

Note: The acceptable quality image is well-cropped, sharp and with no glare present, has a resolution of at least 300 dpi (for data capture) or 600 dpi (for authentication). The aspect ratio should be acceptable and matches an ID document.

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Updating to 11.6.4+

Please see the provided Migration Details for information about updating to 11.6.4+

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Prerequisites

• iOS version 11.0 or later
• Xcode 15+

Modules

The SDK includes the following modules:

Acuant Face Capture Library (AcuantFaceCapture):

• Uses native iOS Camera to capture face.

Acuant Passive Liveness Library (AcuantPassiveLiveness):

• Uses proprietary algorithm to detect a live person

Acuant Common Library (AcuantCommon):

• Contains all shared internal models and supporting classes

Acuant Camera Library (AcuantCamera):

• Implemented using iOS native camera library
• Uses AcuantImagePreparation for cropping
• Uses https://github.com/SwiftyTesseract/libtesseract for OCR on device

Acuant Image Preparation Library (AcuantImagePreparation):

• Contains all image processing such as cropping, calculation of sharpness and glare

Acuant Document Processing Library (AcuantDocumentProcessing):

• Contains all the methods to upload the document images, process and get results

Acuant Face Match Library (AcuantFaceMatch):

• Contains a method to match two facial images

Acuant EChip Library (AcuantEchipReader):

• Contains methods for e-Passport chip reading and authentication using Ozone
• Depends on https://github.com/krzyzanowskim/OpenSSL

Acuant HG Liveness Library (AcuantHGLiveness):

• Uses iOS native camera library to capture facial liveness using a proprietary algorithm

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Manual Setup

1. Add the following dependent embedded frameworks:

   • AcuantFaceCapture
   • AcuantPassiveLiveness
   • AcuantCommon
   • AcuantImagePreparation
   • AcuantDocumentProcessing
   • AcuantHGLiveness
   • AcuantFaceMatch
   • AcuantEchipReader
     • OpenSSL.xcframework
   • AcuantCamera
     • libtesseract.xcframework (Do Not Embed)

   

   Note: AcuantCamera and AcuantFaceCapture are open projects. You will have to add the source code to your solution for frameworks.

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Using CocoaPods

Important Note: When using import statements for open projects (specifically AcuantCamera and AcuantFaceCapture) with CocoaPods, please use import AcuantiOSSDKV11 in Xcode.

1. Add the following in the podfile to get all the modules:

    platform :ios, '11'
    use_frameworks! # important
    
    pod 'AcuantiOSSDKV11', '~> 11.6.1' #for all packages
   

Alternatively, use the following to add independent modules in the podfile:

• AcuantCamera

   	pod 'AcuantiOSSDKV11/AcuantCamera'
   	dependency AcuantImagePreparation
   	dependency AcuantCommon
   			
   	pod 'AcuantiOSSDKV11/AcuantCamera/Document' # if you want Document camera
   	
   	pod 'AcuantiOSSDKV11/AcuantCamera/Mrz' # if you want MRZ camera
   	dependency TesseractOCRiOS
   	
   	pod 'AcuantiOSSDK11/AcuantCamera/Barcode' # if you want Barcode camera
  

• AcuantFaceCapture

   	pod 'AcuantiOSSDKV11/AcuantFaceCapture'
  

• AcuantImagePreparation

   	pod 'AcuantiOSSDKV11/AcuantImagePreparation'
   	dependency AcuantCommon
  

• AcuantDocumentProcessing

   	pod 'AcuantiOSSDKV11/AcuantDocumentProcessing'
   	dependency AcuantCommon
  

• AcuantHGLiveness

   	pod 'AcuantiOSSDKV11/AcuantHGLiveness'
   	dependency AcuantCommon
  

• AcuantPassiveLiveness

   	pod 'AcuantiOSSDKV11/AcuantPassiveLiveness'
   	dependency AcuantCommon
  

• AcuantFaceMatch

   	pod 'AcuantiOSSDKV11/AcuantFaceMatch'
   	dependency AcuantCommon
  

• AcuantEchipReader

   	pod 'AcuantiOSSDKV11/AcuantEchipReader'
   	dependency AcuantCommon
   	dependency OpenSSL
  

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Required Setup

Create a plist file named AcuantConfig that includes the following details:

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
		<dict>
			<key>acuant_username</key>
			<string>xxxxxx@acuantcorp.com</string>
			<key>acuant_password</key>
			<string>xxxxxxxxxx</string>
			<key>acuant_subscription</key>
			<string>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</string>
			<key>frm_endpoint</key>
			<string>https://frm.acuant.net</string>
			<key>passive_liveness_endpoint</key>
			<string>https://us.passlive.acuant.net</string>
			<key>med_endpoint</key>
			<string>https://medicscan.acuant.net</string>
			<key>assureid_endpoint</key>
			<string>https://services.assureid.net</string>
			<key>acas_endpoint</key>
			<string>https://acas.acuant.net</string>
			<key>ozone_endpoint</key>
			<string>https://ozone.acuant.net</string>
		</dict>
	</plist>

The following are the default values for testing purposes:

	PREVIEW
			<key>frm_endpoint</key>
			<string>https://preview.face.acuant.net</string>
			<key>passive_liveness_endpoint</key>
			<string>https://preview.passlive.acuant.net</string>
			<key>med_endpoint</key>
			<string>https://preview.medicscan.acuant.net</string>
			<key>assureid_endpoint</key>
			<string>https://preview.assureid.acuant.net</string>
			<key>acas_endpoint</key>
			<string>https://preview.acas.acuant.net</string>
			<key>ozone_endpoint</key>
			<string>https://preview.ozone.acuant.net</string>
	
The following are the default values based on region:

	USA
		<key>frm_endpoint</key>
		<string>https://frm.acuant.net</string>
		<key>passive_liveness_endpoint</key>
		<string>https://us.passlive.acuant.net</string>
		<key>med_endpoint</key>
		<string>https://medicscan.acuant.net</string>
		<key>assureid_endpoint</key>
		<string>https://services.assureid.net</string>
		<key>acas_endpoint</key>
		<string>https://acas.acuant.net</string>
		<key>ozone_endpoint</key>
		<string>https://ozone.acuant.net</string>

	EU
		<key>frm_endpoint</key>
		<string>https://eu.frm.acuant.net</string>
		<key>passive_liveness_endpoint</key>
		<string>https://eu.passlive.acuant.net</string>
		<key>assureid_endpoint</key>
		<string>https://eu.assureid.acuant.net</string>
		<key>acas_endpoint</key>
		<string>https://eu.acas.acuant.net</string>
		<key>ozone_endpoint</key>
		<string>https://eu.ozone.acuant.net</string>

	AUS
		<key>frm_endpoint</key>
		<string>https://aus.frm.acuant.net</string>
		<key>passive_liveness_endpoint</key>
		<string>https://aus.passlive.acuant.net</string>
		<key>assureid_endpoint</key>
		<string>https://aus.assureid.acuant.net</string>
		<key>acas_endpoint</key>
		<string>https://aus.acas.acuant.net</string>
		<key>ozone_endpoint</key>
		<string>https://aus.ozone.acuant.net</string>

Initialize

Initialization Before you use the SDK, you must initialize it, either by using the credentials saved on the device or by using bearer tokens (provided by an external server).

1. Select packages for initialization.

    let packages = [AcuantEchipPackage(), ImagePreparationPackage()]
   

2. Initialize the SDK.

    let initalizer: IAcuantInitializer = AcuantInitializer()
    
    let task = initalizer.initialize(packages: packages){ [weak self]
    	error in
    		if let err = error{
    			//error
    		}
    		else{
    			//success
    		}	
    }
   

   Note: If you are not using a configuration file for initialization, then use the following statement (providing appropriate credentials for username, password, and subscription ID):

    Credential.setUsername(username: "xxx")
    Credential.setPassword(password: "xxxx")
    Credential.setSubscription(subscription: "xxxxxx")
   
    let endpoints = Endpoints()
    endpoints.frmEndpoint = "https://frm.acuant.net"
    endpoints.healthInsuranceEndpoint = "https://medicscan.acuant.net"
    endpoints.idEndpoint = "https://services.assureid.net"
    endpoints.acasEndpoint = "https://acas.acuant.net"
    endpoints.ozoneEndpoint = "https://ozone.acuant.net"
   
    Credential.setEndpoints(endpoints: endpoints)		
   

Bearer Tokens

1. Use Acuant Services to retrieve a token. Acuant recommends using a proxy service to retrieve the token to ensure integrity of credentials.

2. Set the token:

    if let success = Credential.setToken(token: ""){
    	//token was valid
    }
    else{
    	//invalid or expired token
    }
   

3. Tokens will eventually expire, depending on the provided settings. Use the method below to ensure token is still valid before reusing the token.

    if let token : AcuantJwtToken = Credential.getToken(){
    	let valid: Bool = token.isValid()
    }
   

4. Note: If token is set, all service calls will attempt to authorize using the token. If the token is not set, the legacy credentials will be used.

Initialization without a Subscription ID

AcuantImagePreparation may be initialized by providing only a username and a password. However, without providing a Subscription ID, the application can only capture an image and get the image.

Initialize without a Subscription ID:

• Only the AcuantCamera, AcuantImagePreparation, and AcuantHGLiveness modules may be used.
• The SDK can be used to capture the identity documents.
• The captured images can be exported from the SDK. See the DocumentCaptureDelegate protocol in the AcuantCamera project.

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Capture an Image using AcuantCamera

AcuantCamera is best used in portrait mode. Lock the orientation of the app before using Camera.

1. To get the document image and barcode string, implement DocumentCameraViewControllerDelegate protocol.

   public protocol DocumentCameraViewControllerDelegate {
     func onCaptured(image: Image, barcodeString: String?)
   }
   
   extension MyViewController: DocumentCameraViewControllerDelegate {
     func onCaptured(image: Image, barcodeString: String?) {
       if let result = image.image {
   
       } else {
         //user has cancelled
       }
     }
   }

2. Customize, create, and open the camera. For all configurable fields, see DocumentCameraOptions.

   let textForState: (DocumentCameraState) -> String = { state in
     switch state {
     case .align: return "ALIGN"
     case .moveCloser: return "MOVE CLOSER"
     case .tooClose: return "TOO CLOSE"
     case .steady: return "HOLD STEADY"
     case .hold: return "HOLD"
     case .capture: return "CAPTURING"
     @unknown default: return ""
     }
   }
   let options = DocumentCameraOptions(autoCapture: true, hideNavigationBar: true, textForState: textForState)
   let documentCameraViewController = DocumentCameraViewController(options: options)
   documentCameraViewController.delegate = self
   navigationController.pushViewController(documentCameraViewController, animated: false)

   Note: When the camera is launched, the image processing speed is automatically checked.

• Live document detection and auto capture features are enabled if the device supports a speed of at least 130ms.
• For devices that don't meet the processing threshold, tap to capture will be enabled. Live document detection and auto capture features are disabled and switched to tap to capture. The user will have to manually capture the document.

Using Custom UI with DocumentCaptureSession (see DocumentCameraViewController.swift for reference):

1. To get the image and barcode string, implement DocumentCaptureSessionDelegate protocol.

   public protocol DocumentCaptureSessionDelegate {
     func readyToCapture()
     func documentCaptured(image: UIImage, barcodeString: String?)
   }

2. (Optionally) Implement AutoCaptureDelegate and FrameAnalysisDelegate protocols to define the auto capture behavior and receive frame results respectively.

   public protocol AutoCaptureDelegate {
     func getAutoCapture() -> Bool
     func setAutoCapture(autoCapture: Bool)
   }
   
   public protocol FrameAnalysisDelegate {
     func onFrameAvailable(frameResult: FrameResult, points: [CGPoint]?)
   }
   
   public enum FrameResult: Int {
       case noDocument,
       smallDocument,
       badAspectRatio,
       goodDocument,
       documentNotInFrame
   }

3. Create the capture session.

   let captureDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: AVMediaType.video, position: .back)!
   let captureSession = DocumentCaptureSession(captureDevice: captureDevice)
   captureSession.delegate = self
   captureSession.autoCaptureDelegate = self //optional
   captureSession.frameDelegate = self //optional

4. Add the capture session to AVCaptureVideoPreviewLayer and then start it.

   let videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
   captureSession.start()
   //Starts the capture session asynchronously on a background queue and notifies 
   //the caller once the session is started via a completion handler. 
   //The completion handler is optional and will be called on the main queue.
   
   //write your own custom UI code

5. Trigger capture.

   captureSession.enableCapture()

6. Stop the capture session.

   captureSession.stop() // stops the capture session asynchronously on a background queue

Note: AcuantCamera depends on AcuantImagePreparation and AcuantCommon.

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Capture a document barcode using AcuantCamera

Note: During regular capture of a document, the camera attempts to read the barcode. Launch this camera mode only if the barcode is expected according to document classification and failed to read during normal capture of the relevant side.

1. To get the barcode string, implement BarcodeCameraViewControllerDelegate protocol.

   public protocol BarcodeCameraViewControllerDelegate: AnyObject {
       func onCaptured(barcode: String?)
   }

2. Customize, create, and open the camera. For all configurable fields, see BarcodeCameraOptions.

   let options = BarcodeCameraOptions(waitTimeAfterCapturingInSeconds: 1, timeoutInSeconds: 20)
   let barcodeCamera = BarcodeCameraViewController(options: options)
   barcodeCamera.delegate = self
   navigationController?.pushViewController(barcodeCamera, animated: false)

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Read MRZ using AcuantCamera

1. If you are manually integrating the SDK, make sure to link libtesseract.xcframework and select "Do Not Embed".

2. Add the OCRB Training data to your project in a referenced folder called tessdata. Acuant recommends using the training data resource in the Assets directory of the Sample App. See https://www.kodeco.com/2010498-tesseract-ocr-tutorial-for-ios#toc-anchor-005.

3. Implement MrzCameraViewControllerDelegate protocol to get the MRZ result.

   public protocol MrzCameraViewControllerDelegate: AnyObject {
     func onCaptured(mrz: AcuantMrzResult?)
   }

4. Customize, create, and open the camera. For all configurable fields, see MrzCameraOptions .

   let textForState: (MrzCameraState) -> String = { state in
     switch state {
     case .none, .align: return ""
     case .moveCloser: return "Move Closer"
     case .tooClose: return "Too Close!"
     case .good: return "Reading MRZ"
     case .captured: return "Captured"
     case .reposition: return "Reposition"
     @unknown default: return ""
     }
   }
   let options = MrzCameraOptions(textForState: textForState)
   let mrzCameraViewController = MrzCameraViewController(options: options)
   mrzCameraViewController.delegate = self
   navigationController?.pushViewController(mrzCameraViewController, animated: false)

5. Result.

   public class AcuantMrzResult {
     public var surName: String = ""
     public var givenName: String = ""
     public var country: String = ""
     public var passportNumber: String = ""
     public var nationality: String = ""
     public var dob: String = ""
     public var gender: String = ""
     public var passportExpiration: String = ""
     public var personalDocNumber: String = ""
     public var threeLineMrz: Bool = false
     public var checkSumResult1: Bool = false
     public var checkSumResult2: Bool = false
     public var checkSumResult3: Bool = false
     public var checkSumResult4: Bool = false
     public var checkSumResult5: Bool = false
   }

---

AcuantEchipReader

1. Configure the application to detect NFC Tags. Add "Near Field Communication" Capability to the target app under Signing and Capability in Xcode. Then, add "NFCReaderUsageDescription" key to the Info.plist of the app. For more info, please look at "Configure the App to Detect NFC Tags" on https://developer.apple.com/documentation/corenfc/building_an_nfc_tag-reader_app.

2. Add "ISO7816 application identifiers for NFC Tag Reader Session" key with "A0000002471001" as item value in application info.plist.

3. AcuantEchipPackage must be initialized in the previous step.

4. This feature is only available in iOS version 13 and above. You will need to use the @available attribute to use methods inside module.

5. Create an instance of Acuant Reader. Make sure this object does not get disposed while reading.

    private let reader: IEchipReader = EchipReader()
   

6. Create a session request.

    let request = AcuantEchipSessionRequest(passportNumber: "", dateOfBirth: "", expiryDate: "")
   

7. Set custom messages based on state of reader.

    public enum AcuantEchipDisplayMessage {
        case requestPresentPassport
        case authenticatingWithPassport(Int)
        case readingDataGroupProgress(String, Int)
        case error
        case authenticatingExtractedData
        case successfulRead
    }
   
    let customDisplayMessage : ((AcuantEchipDisplayMessage) -> String?) =  {
    	message in
   
    		switch message {
    			case .requestPresentPassport:
    				return "Hold your iPhone near an NFC enabled passport."
    			case .authenticatingWithPassport(let progress):
                let progressString = handleProgress(percentualProgress: progress)
                return "Authenticating with passport.....\n\n\(progressString)"
    			case .readingDataGroupProgress(let dataGroup, let progress):
    				let progressString = handleProgress(percentualProgress: progress)
    				return "Reading \(dataGroup).....\n\n\(progressString)"
    			case .error:
    				return "Sorry, there was a problem reading the passport. Please try again"
    			case .successfulRead:
    				return "Passport read successfully"
    			case .authenticatingExtractedData:
    				return "Authenicating with Ozone"
        }
    }
   

8. Start the reader.

    self.reader.readNfcTag(request: request, customDisplayMessage: customDisplayMessage) { [weak self]
    	model, error in
    		if let result = model {
        			//success
    		} else if let error = error {
    				//error
    		} else {
    				//user canceled
    		}
    }
   

9. Result.

    public class AcuantPassportModel {
    	public var documentType: String
    	public var documentSubType: String
    	public var documentCode: String
    	public var translatedDocumentType: TranslatedDocumentType
    	public var personalNumber: String
    	public var documentNumber: String
    	public var issuingAuthority: String
    	public var documentExpiryDate: String
    	public var firstName: String
    	public var lastName: String
    	public var dateOfBirth: String
    	public var gender: String
    	public var nationality: String
    	public var image: UIImage?
    	public var signatureImage: UIImage?
    	public var passportSigned: OzoneResultStatus
    	public var passportCountrySigned: OzoneResultStatus
    	public var PACEStatus: AuthStatus
    	public var BACStatus: AuthStatus
    	public var chipAuthenticationStatus: AuthStatus
    	public var activeAuthenticationStatus: AuthStatus
    	public var passportDataValid: Bool
    	public var age: Int?
    	public var isExpired: Bool?
    	  
    	public func getRawDataGroup(dgId: AcuantDataGroupId) -> [UInt8]? {
    		return self.dataGroups[dgId]
    	}
    }
   
    public enum AuthStatus {
    	case success 
    	case failure 
    	case skipped
    }
    
    public enum OzoneResultStatus: Int {
    	case SUCCESS
    	case FAILED
    	case UNKNOWN
    }
   
    public enum AcuantDataGroupId: Int {
    	case COM
    	case DG1
    	case DG2
    	case DG3
    	case DG4
    	case DG5
    	case DG6
    	case DG7
    	case DG8
    	case DG9
    	case DG10
    	case DG11
    	case DG12
    	case DG13
    	case DG14
    	case DG15
    	case DG16
    	case SOD
    	case Unknown
    }
   
    public enum TranslatedDocumentType: String, CaseIterable {
    	case `default` = "Default"
    	case nationalPassport = "National Passport"
    	case emergencyPassport = "Emergency Passport"
    	case diplomaticPassport = "Diplomatic Passport"
    	case officialOrServicePassport = "Official/Service Passport"
    	case refugeePassport = "Refugee Passport"
    	case alienPassport = "Alien Passport"
    	case statelessPassport = "Stateless Passport"
    	case travelDocument = "Travel Document"
    	case militaryPassport = "Military Passport"
    }
   

10. Map country to passport.

     public let AcuantCountryDataPageMap: [String: String]
     //{ "CountryCode": "Location" }
    

---

AcuantImagePreparation

This module contains all image preparation functionality.

Cropping, Sharpness, and Glare

After an image is captured, it is cropped and checked for sharpness and glare. This is done using the evaluateImage of AcuantImagePreparation.

public class func evaluateImage(data: CroppingData, callback: (AcuantImage, AcuantError) -> ())

To create the CroppingData used above, use the following method passing in the Image that you received from the camera:

CroppingData.newInstance(image: Image)

The callback returns the AcuantImage and AcuantError. The AcuantImage can be used to verify the crop, sharpness, and glare of the image, and then upload the document in the next step (see AcuantDocumentProcessing).

public class AcuantImage {
	public let image: UIImage
	public let data: NSData
	public let sharpness: Int
	public let glare: Int
	public let dpi: Int
	public let isPassport: Bool
}	

If the sharpness value is greater than 50, then the image is considered sharp (not blurry). If the glare value is 100, then the image does not contain glare. If the glare value is 0, then image contains glare.

Preferably, the image must be sharp and not contain glare to get best results in authentication and data extraction. When the image has glare, low sharpness, or both, retry the capture.

Note: If you are using an independent orchestration layer, make sure you supply AcuantImage.data, and not AcuantImage.image. AcuantImage.image is provided only for visual use within the application (for example, for presenting the crop result to the user for visual verification). Do not modify AcuantImage.data in any way before upload.

---

AcuantDocumentProcessing

After you capture a document image and completed crop, it can be processed using the following steps.

Note: If an upload fails with an error, retry the image upload using a better image.

1. Create an instance:

    public class func createInstance(options:IdOptions,delegate:CreateInstanceDelegate)
   
    public protocol CreateInstanceDelegate{
    	func instanceCreated(instanceId: String?,error:AcuantError?);
    }
   

2. Prepare the image. You must pass in AcuantImage.data and idData.barcodeString (when applicable) in EvaluatedImageData.

    public class EvaluatedImageData {
    	public let imageBytes: NSData
    	public let barcodeString: String?
    	public init(imageBytes: NSData, barcodeString: String?)
    }
   

3. Upload the image:

    public class func uploadImage(instancdId:String,data:EvaluatedImageData,options:IdOptions,delegate:UploadImageDelegate)
   
    public protocol UploadImageDelegate{
    	func imageUploaded(error: AcuantError?,classification:Classification?);
    }
   

4. Get the data:

    public class func getData(instanceId:String,isHealthCard:Bool,delegate:GetDataDelegate?)
   
    public protocol UploadImageDelegate{
    	func imageUploaded(error: AcuantError?,classification:Classification?);
    }
   

5. Delete the instance:

    public class func deleteInstance(instanceId : String,type:DeleteType, delegate:DeleteDelegate)
   
    public protocol DeleteDelegate {
    	func instanceDeleted(success : Bool)
    }
   

---

Acuant Face Capture

1. (Optional) Set default Image. Locate "acuant_default_face_image.png" in the Assets directory of sample app project. Add this to your app if needed.

2. Add localized strings in app's localizables as indicated here.

3. Set any UI Customizations needed:

    class FaceCameraOptions{
    	public let totalCaptureTime: Int //totoal time to capture
    	public let bracketColorDefault: CGColor //bracket color default (no face)
    	public let bracketColorError: CGColor //bracket color error (error in face requirements)
    	public let bracketColorGood: CGColor //bracket color good (good face requirements)
    	public let fontColorDefault: CGColor //font color default
    	public let fontColorError: CGColor //font color error
    	public let fontColorGood: CGColor //font color good
    	public let defaultImageUrl: String //default image
    	public let showOval: Bool // show oval
    }
    
    //example
    let options = FaceCameraOptions()
   

4. Get the Controller and push to navigationController:

    let controller = FaceCaptureController()
    controller.options = options
    controller.callback = { [weak self]
    	(result: FaceCaptureResult?) in
    		
    		if (result == nil) {
    			//user canceled
    		}
        
    }
    		
    self.navigationController.pushViewController(controller, animated: true)
   

5. Use the callback with the captured result.

---

Acuant Passive Liveness

Acuant recommends using the LiveAssessment property rather than the score) to evaluate response. PassiveLiveness.startSelfieCapture will return a rescaled image.

Follow these recommendations to effectively process an image for passive liveness:

Image requirements

• Height: minimum 480 pixels; recommended 720 or 1080 pixels
• Compression: Image compression is not recommended (JPEG 70 level or above is acceptable). For best results, use uncompressed images.

Face requirements

• Out-of-plane rotation: Face pitch and yaw angle: from -20 to 20 degrees +/-3 degrees
• In-plane rotation: Face roll angle: from -30 to 30 degrees +/- 3 degrees
• Pupillary distance: Minimum distance between the eyes 90 +/- 5 pixels
• Face size: Minimum 200 pixels in either dimension
• Faces per image: 1
• Sunglasses: Must be removed

Capture requirements

The following may significantly increase errors or false results:

• Using a motion blur effect
• Texture filtering
• A spotlight on the face and nearest surroundings
• An environment with poor lighting or colored light

Note: The use of fish-eye lenses is not supported by this API.

1. Get Passive Liveness result with Data:

    //liveness request
    class AcuantLivenessRequest {
        public let jpegData: Data
        public init(jpegData: Data)
    }
    
    //liveness response
    class AcuantLivenessResponse {
    	public let score: Int
    	public let result: AcuantLivenessAssessment
    	
    	public enum AcuantLivenessAssessment: String {
    		case Error
    		case PoorQuality
    		case Live
    		case NotLive
    	}
    }
    
    //liveness response
    class AcuantLivenessError {
    	public let errorCode: AcuantLivenessErrorCode?
    	public let description: String?
    	
    	
    	public enum AcuantLivenessErrorCode: String {
    	    case Unknown
    	    case FaceTooClose
    	    case FaceNotFound
    	    case FaceTooSmall
    	    case FaceAngleTooLarge
    	    case FailedToReadImage
    	    case InvalidRequest
    	    case InvalidRequestSettings
    	    case Unauthorized
    	    case NotFound
    	    case InternalError
    	    case InvalidJson
    	}
    }
    
    //example
    PassiveLiveness.postLiveness(request: AcuantLivenessRequest(jpegData: jpegData)) { [weak self]
    	(result: AcuantLivenessResponse?, error: AcuantLivenessError?) in
    		//response
    }
   

---

AcuantHGLiveness

This module checks for liveness (whether the subject is a live person) by using blink detection. The user interface code for this is contained in the Sample application (FaceLivenessCameraController.swift) which customers may modify for their specific requirements.

Acuant UI in Sample App

// Code for HG Live controller
let liveFaceViewController = FaceLivenessCameraController()
liveFaceViewController.delegate : AcuantHGLiveFaceCaptureDelegate = self
self.navigationController.pushViewController(liveFaceViewController, animated: true)

Custom UI, create a face live capture session:

enum AcuantFaceType : Int {

	case NONE // No face was detected

	case FACE_TOO_CLOSE // Face is too close to the camera

	case FACE_MOVED // Face is no longer in its original position

	case FACE_TOO_FAR // Face is too far from camera

	case FACE_GOOD_DISTANCE // Face is at the appropriate distance and is in frame
	
	case FACE_NOT_IN_FRAME // Face is not in the frame

	case FACE_HAS_ANGLE // Face is angled either roll or yaw
}

public protocol AcuantHGLiveFaceCaptureDelegate {
		func liveFaceDetailsCaptured(liveFaceDetails: LiveFaceDetails?, faceType: HGLiveness.AcuantFaceType)
}

public class func getFaceCaptureSession(delegate:AcuantHGLiveFaceCaptureDelegate?, captureDevice: AVCaptureDevice?)-> FaceCaptureSession


let faceCaptureSession = HGLiveness.getFaceCaptureSession(delegate: self, captureDevice: captureDevice)

---

AcuantFaceMatch

This module is used to match two facial images:

	public class func processFacialMatch(facialData: FacialMatchData, delegate: FacialMatchDelegate)

	public protocol FacialMatchDelegate {
		func facialMatchFinished(result: FacialMatchResult?)
	}

	public class FacialMatchData {
		public var faceOneData: Data // Facial image from ID Card (image gets compressed by 80%)
		public var faceTwoData: Data // Facial image from selfie capture during liveness check (image gets compressed by 80%)
	}

---

Language localization

In order to display texts in the corresponding language you need to add the following localizable strings to your app's localizable:

AcuantFaceCapture

"acuant_face_camera_initial" = "Align face to start capture";
"acuant_face_camera_face_too_close" = "Too Close! Move Away";
"acuant_face_camera_face_too_far" = "Move Closer";
"acuant_face_camera_face_has_angle" =  "Face has Angle. Do not tilt";
"acuant_face_camera_face_not_in_frame" =  "Move in Frame";
"acuant_face_camera_face_moved" = "Hold Steady";
"acuant_face_camera_capturing_2" = "Capturing\n2...";
"acuant_face_camera_capturing_1" = "Capturing\n1...";
"acuant_face_camera_rotate_portrait" = "Face can only be captured in portrait";
"acuant_face_camera_paused" = "Camera paused";

---

Error codes

public class AcuantErrorCodes{
	public static let ERROR_InvalidCredentials = -1
	public static let ERROR_InvalidEndpoint = -3
	public static let ERROR_InitializationNotFinished = -4
	public static let ERROR_Network = -5
	public static let ERROR_InvalidJson = -6
	public static let ERROR_CouldNotCrop = -7
	public static let ERROR_CouldNotCreateConnectInstance = -13
	public static let ERROR_CouldNotUploadConnectImage = -14
	public static let ERROR_CouldNotUploadConnectBarcode = -15
	public static let ERROR_CouldNotGetConnectData = -16
	public static let ERROR_CouldNotClassifyDocument = -20
	public static let ERROR_LowResolutionImage = -21
	public static let ERROR_BlurryImage = -22
	public static let ERROR_ImageWithGlare = -23
	public static let ERROR_CouldNotGetIPLivenessToken = -24
	public static let ERROR_NotALiveFace = -25
	public static let ERROR_CouldNotAccessLivenessData = -26
	public static let ERROR_CouldNotAccessCredential = -27
	public static let ERROR_USER_CANCELED_ACTIVITY = -28
	public static let ERROR_INVALID_PARAMETER = -29
	    
	//ozone
	public static let ERROR_OzoneInvalidFormat = -50;
	public static let ERROR_OzoneNotAuthorized = -51;
	    
	//echip
	public static let ERROR_EChipReadError = -60;
	public static let ERROR_InvalidNfcTag = -61;
	public static let ERROR_InvalidNfcKeyFormatting = -62;
}

Error descriptions

public class AcuantErrorDescriptions {
	public static let ERROR_DESC_InvalidCredentials = "Invalid credentials"
	public static let ERROR_DESC_InvalidLicenseKey = "Invalid License Key"
	public static let ERROR_DESC_InvalidEndpoint = "Invalid endpoint"
	public static let ERROR_DESC_Network = "Network problem"
	public static let ERROR_DESC_InitializationNotFinished = "Initialization not finished"
	public static let ERROR_DESC_InvalidJson = "Invalid Json response"
	public static let ERROR_DESC_CouldNotCrop = "Could not crop image"
	public static let ERROR_DESC_BarcodeCaptureFailed = "Barcode capture failed"
	public static let ERROR_DESC_BarcodeCaptureTimedOut = "Barcode capture timed out"
	public static let ERROR_DESC_BarcodeCaptureNotAuthorized = "Barcode capture is not authorized"
	public static let ERROR_DESC_LiveFaceCaptureNotAuthorized = "Live face capture is not authorized"
	public static let ERROR_DESC_CouldNotCreateConnectInstance = "Could not create connect Instance"
	public static let ERROR_DESC_CouldNotUploadConnectImage = "Could not upload image to connect instance"
	public static let ERROR_DESC_CouldNotUploadConnectBarcode = "Could not upload barcode to connect instance"
	public static let ERROR_DESC_CouldNotGetConnectData = "Could not get connect image data"
	public static let ERROR_DESC_CardWidthNotSet = "Card width not set"
	public static let ERROR_DESC_CouldNotGetHealthCardData = "Could not get health card data"
	public static let ERROR_DESC_CouldNotClassifyDocument = "Could not classify document"
	public static let ERROR_DESC_LowResolutionImage = "Low resolution image"
	public static let ERROR_DESC_BlurryImage = "Blurry image"
	public static let ERROR_DESC_ImageWithGlare = "Image has glare"
	public static let ERROR_DESC_CouldNotGetIPLivenessToken = "Could not get face liveness token"
	public static let ERROR_DESC_NotALiveFace = "Not a live face"
	public static let ERROR_DESC_CouldNotAccessLivenessData = "Could not access liveness data"
	public static let ERROR_DESC_ERROR_CouldNotAccessCredential = "Could not get credential"
	public static let ERROR_DESC_USER_CANCELED_ACTIVITY = "User canceled activity"
	public static let ERROR_DESC_INVALID_PARAMETERS = "Invalid Parameters."
	
	public static let ERROR_DESC_OzoneInvalidFormat = "Ozone returned invalid format";
	public static let ERROR_DESC_OzoneNotAuthorized = "Credentials not authorized for ozone";
	
	public static let ERROR_DESC_EChipReadError = "Error reading eChip. Connection lost to passport or incorrect key.";
	public static let ERROR_DESC_InvalidNfcTag = "Tag Tech list was null. Most likely means unsupported passport/not a passport";
	public static let ERROR_DESC_InvalidNfcKeyFormatting = "Decryption key formatted incorrectly. Check DOB, DOE, and doc number.";
}

Image

public class Image {
	public var image: UIImage? = nil
	public var dpi: Int = 0 // dpi value of the captured image
	public var error: AcuantError? = nil
	public var isCorrectAspectRatio = false // If the captured image has the correct aspect ratio
	public var aspectRatio: Float = 0.0 // Aspect ratio of the captured image
	public var points: Array<CGPoint> = []
	public var isPassport = false
	public init(){}
}

DocumentCameraOptions

public class DocumentCameraOptions: CameraOptions {
  public let countdownDigits: Int
  public let timeInSecondsPerCountdownDigit: Double
  public let textForManualCapture: String
  public let textForState: (DocumentCameraState) -> String
  public let colorForState: (DocumentCameraState) -> CGColor

  public init(countdownDigits: Int = 2,
              timeInSecondsPerCountdownDigit: Double = 0.9,
              showDetectionBox: Bool = true,
              autoCapture: Bool = true,
              hideNavigationBar: Bool = true,
              showBackButton: Bool = true,
              bracketLengthInHorizontal: Int = 80,
              bracketLengthInVertical: Int = 50,
              defaultBracketMarginWidth: CGFloat = 0.5,
              defaultBracketMarginHeight: CGFloat = 0.6,
              textForManualCapture: String = "ALIGN & TAP",
              textForState: @escaping (DocumentCameraState) -> String = { state in
                switch state {
                case .align: return "ALIGN"
                case .moveCloser: return "MOVE CLOSER"
                case .tooClose: return "TOO CLOSE"
                case .steady: return "HOLD STEADY"
                case .hold: return "HOLD"
                case .capture: return "CAPTURING"
                @unknown default: return ""
                }
              },
              colorForState: @escaping (DocumentCameraState) -> CGColor = { state in
                switch state {
                case .align: return UIColor.black.cgColor
                case .moveCloser: return UIColor.red.cgColor
                case .tooClose: return UIColor.red.cgColor
                case .steady: return UIColor.yellow.cgColor
                case .hold: return UIColor.yellow.cgColor
                case .capture: return UIColor.green.cgColor
                @unknown default: return UIColor.black.cgColor
                }
              },
              textForCameraPaused: String = "CAMERA PAUSED",
              backButtonText: String = "BACK",
              preventScreenshots: Bool = true)
  }

BarcodeCameraOptions

public class BarcodeCameraOptions: CameraOptions {
  public let waitTimeAfterCapturingInSeconds: Int
  public let timeoutInSeconds: Int
  public let textForState: (BarcodeCameraState) -> String
  public let colorForState: (BarcodeCameraState) -> CGColor

  public init(hideNavigationBar: Bool = true,
              showBackButton: Bool = true,
              waitTimeAfterCapturingInSeconds: Int = 1,
              timeoutInSeconds: Int = 20,
              textForState: @escaping (BarcodeCameraState) -> String = { state in
                switch state {
                case .align: return "CAPTURE BARCODE"
                case .capturing: return "CAPTURING"
                @unknown default: return ""
                }
              },
              colorForState: @escaping (BarcodeCameraState) -> CGColor = { state in
                switch state {
                case .align: return UIColor.white.cgColor
                case .capturing: return UIColor.green.cgColor
                @unknown default: return UIColor.white.cgColor
                }
              },
              textForCameraPaused: String = "CAMERA PAUSED",
              backButtonText: String = "BACK",
              placeholderImageName: String? = "barcode_placement_overlay",
              preventScreenshots: Bool = true)
	}

MrzCameraOptions

public class MrzCameraOptions: CameraOptions {
  public let textForState: (MrzCameraState) -> String
  public let colorForState: (MrzCameraState) -> CGColor

  public init(showDetectionBox: Bool = true,
              bracketLengthInHorizontal: Int = 50,
              bracketLengthInVertical: Int = 40,
              defaultBracketMarginWidth: CGFloat = 0.58,
              defaultBracketMarginHeight: CGFloat = 0.63,
              hideNavigationBar: Bool = true,
              showBackButton: Bool = true,
              placeholderImageName: String? = "Passport_placement_Overlay",
              textForState: @escaping (MrzCameraState) -> String = { state in
                switch state {
                case .none, .align: return ""
                case .moveCloser: return "Move Closer"
                case .tooClose: return "Too Close!"
                case .good: return "Reading MRZ"
                case .captured: return "Captured"
                case .reposition: return "Reposition"
                @unknown default: return ""
                }
              },
              colorForState: @escaping (MrzCameraState) -> CGColor = { state in
                switch state {
                case .none, .align: return UIColor.black.cgColor
                case .moveCloser: return UIColor.red.cgColor
                case .tooClose: return UIColor.red.cgColor
                case .good: return UIColor.yellow.cgColor
                case .captured: return UIColor.green.cgColor
                case .reposition: return UIColor.red.cgColor
                @unknown default: return UIColor.black.cgColor
                }
              },
              textForCameraPaused: String = "CAMERA PAUSED",
              backButtonText: String = "BACK",
              preventScreenshots: Bool = true)
}

IdOptions

public class IdOptions {
	public var cardSide: DocumentSide = .front
	public var isHealthCard: Bool = false
	public var isRetrying: Bool = false
	public var authenticationSensitivity: AuthenticationSensitivity = AuthenticationSensitivity.normal
	public var tamperSensitivity: TamperSensitivity = TamperSensitivity.normal
	public var countryCode: String?
}

AcuantPassportModel (used in eChip workflow)

public class AcuantPassportModel {
	public var documentType: String
	public var documentSubType: String
	public var documentCode: String
	public var translatedDocumentType: TranslatedDocumentType
	public var personalNumber: String
	public var documentNumber: String
	public var issuingAuthority: String
	public var documentExpiryDate: String
	public var firstName: String
	public var lastName: String
	public var dateOfBirth: String
	public var gender: String
	public var nationality: String
	public var image: UIImage?
	public var signatureImage: UIImage?
	public var passportSigned: OzoneResultStatus
	public var passportCountrySigned: OzoneResultStatus
	public var PACEStatus: AuthStatus
	public var BACStatus: AuthStatus
	public var chipAuthenticationStatus: AuthStatus
	public var activeAuthenticationStatus: AuthStatus
	public var passportDataValid: Bool
	public var age: Int?
	public var isExpired: Bool?

	public func getRawDataGroup(dgId: AcuantDataGroupId) -> [UInt8]?
}

---

Frequently Asked Questions

Why do I get "No such module" error in Xcode when using "import AcuantCamera" when using CocoaPods

AcuantCamera and AcuantFaceCapture are open projects and must be compiled by the user. With CocoaPods, both are compiled into pods name AcuantiOSSDKV11 in which import AcuantiOSSDKV11 must be used in Xcode. Using import AcuantCamera and import AcuantFaceCapture will not work.

How do I obfuscate my iOS application?

Acuant does not provide obfuscation tools, however several third-party tools, including iXGuard and Arxan, are available.

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Copyright 2024 Acuant Inc. All rights reserved.

This document contains proprietary and confidential information and creative works owned by Acuant and its respective licensors, if any. Any use, copying, publication, distribution, display, modification, or transmission of such technology, in whole or in part, in any form or by any means, without the prior express written permission of Acuant is strictly prohibited. Except where expressly provided by Acuant in writing, possession of this information shall not be construed to confer any license or rights under any Acuant intellectual property rights, whether by estoppel, implication, or otherwise.

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Certain product, service, or company designations for companies other than Acuant may be mentioned in this document for identification purposes only. Such designations are often claimed as trademarks or service marks. In all instances where Acuant is aware of a claim, the designation appears in initial capital or all capital letters. However, you should contact the appropriate companies for more complete information regarding such designations and their registration status.

For technical support, go to: https://support.acuant.com

Acuant Inc. 6080 Center Drive, Suite 850, Los Angeles, CA 90045

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