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Copyright © 2005–2015 Luxand, Inc. http://www.luxand.com
1
Luxand, Inc.
http://www.luxand.com
Luxand FaceSDK
6.1
Face Detection and Recognition Library
Developer’s Guide
Copyright © 2005–2015 Luxand, Inc. http://www.luxand.com
2
Table of Contents
Overview ................................................................................................................................... 6
Requirements ............................................................................................................................ 6
Technical Specifications ........................................................................................................... 6
Face Detection ................................................................................................................................................... 7
Face Matching ................................................................................................................................................... 7
Live Video Recognition with Tracker API ....................................................................................................... 7
Facial Feature Detection .................................................................................................................................. 7
Eye Centers Detection ...................................................................................................................................... 8
Gender Recognition .......................................................................................................................................... 8
Facial Expression Recognition ......................................................................................................................... 8
Multi-Core Support ........................................................................................................................................... 8
Library Size ....................................................................................................................................................... 8
Installation ................................................................................................................................ 8
Windows ............................................................................................................................................................ 8
Linux/Mac OS X ................................................................................................................................................ 9
Directory Structure ............................................................................................................................................. 9
Sample Applications ................................................................................................................. 9
Using FaceSDK with Programming Languages .................................................................. 11
Using with .NET (C# and VB) ......................................................................................................................... 11
Using CImage class in .NET ............................................................................................................................ 12
CImage(); .................................................................................................................................................... 13
CImage(Int); ................................................................................................................................................ 13
CImage.ReloadFromHandle(); .................................................................................................................... 13
Using with C/C++ ............................................................................................................................................ 13
Using with Delphi ............................................................................................................................................ 14
Using with Java ................................................................................................................................................ 14
Using with Cocoa ............................................................................................................................................. 14
Using with VisualBasic 6.0 .............................................................................................................................. 15
Using with iOS ................................................................................................................................................. 15
Using with Android .......................................................................................................................................... 15
Unicode support ............................................................................................................................................... 15
Redistributables ...................................................................................................................... 15
Usage Scenarios ...................................................................................................................... 16
Library Activation .................................................................................................................. 17
FSDK_GetHardware_ID Function ................................................................................................................... 17
FSDK_ActivateLibrary Function ..................................................................................................................... 18
FSDK_GetLicenseInfo Function ...................................................................................................................... 18
Initialization ............................................................................................................................ 19
FSDK_Initialize Function ................................................................................................................................ 19
FSDK_Finalize Function .................................................................................................................................. 19
Working with Images ............................................................................................................. 20
FSDK_CreateEmptyImage Function ................................................................................................................ 20
FSDK_LoadImageFromFile Function .............................................................................................................. 21
FSDK_LoadImageFromFileW Function .......................................................................................................... 22
FSDK_SaveImageToFile Function .................................................................................................................. 22
FSDK_SaveImageToFileW Function .............................................................................................................. 23
Copyright © 2005–2015 Luxand, Inc. http://www.luxand.com
3
FSDK_LoadImageFromBuffer Function ......................................................................................................... 24
FSDK_LoadImageFromJpegBuffer Function .................................................................................................. 25
FSDK_LoadImageFromPngBuffer Function ................................................................................................... 25
FSDK_GetImageBufferSize Function .............................................................................................................. 26
FSDK_SaveImageToBuffer Function .............................................................................................................. 27
FSDK_LoadImageFromHBitmap Function ..................................................................................................... 27
FSDK_SaveImageToHBitmap Function .......................................................................................................... 28
FSDK.LoadImageFromCLRImage Function ................................................................................................... 29
FSDK.SaveImageToCLRImage Function ........................................................................................................ 29
FSDK.LoadImageFromAWTImage Function .................................................................................................. 29
FSDK.SaveImageToAWTImage Function ...................................................................................................... 30
FSDK_SetJpegCompressionQuality ................................................................................................................ 30
FSDK_GetImageWidth Function ..................................................................................................................... 31
FSDK_GetImageHeight Function .................................................................................................................... 31
FSDK_CopyImage Function ............................................................................................................................ 32
FSDK_ResizeImage Function .......................................................................................................................... 33
FSDK_RotateImage Function .......................................................................................................................... 34
FSDK_RotateImageCenter Function................................................................................................................ 34
FSDK_RotateImage90 Function ...................................................................................................................... 35
FSDK_CopyRect Function............................................................................................................................... 36
FSDK_CopyRectReplicateBorder Function .................................................................................................... 37
FSDK_MirrorImage Function .......................................................................................................................... 38
FSDK_FreeImage Function ............................................................................................................................. 38
Face Detection ......................................................................................................................... 39
Data types ......................................................................................................................................................... 39
FSDK_DetectFace Function ............................................................................................................................. 40
FSDK_DetectMultipleFaces Function ............................................................................................................. 41
FSDK_SetFaceDetectionParameters Function ................................................................................................. 42
FSDK_SetFaceDetectionThreshold Function .................................................................................................. 44
Facial Feature Detection ........................................................................................................ 45
FSDK_DetectFacialFeatures Function ............................................................................................................. 46
FSDK_DetectFacialFeaturesInRegion Function .............................................................................................. 47
FSDK_DetectEyes Function ............................................................................................................................ 48
FSDK_DetectEyesInRegion Function .............................................................................................................. 49
Detected Facial Features .................................................................................................................................. 50
Face Matching ........................................................................................................................ 53
FSDK_GetFaceTemplate Function .................................................................................................................. 54
FSDK_GetFaceTemplateInRegion Function ................................................................................................... 55
FSDK_GetFaceTemplateUsingEyes Function ................................................................................................. 56
FSDK_GetFaceTemplateUsingFeatures Function ........................................................................................... 57
FSDK_MatchFaces Function ........................................................................................................................... 58
FSDK_GetMatchingThresholdAtFAR Function .............................................................................................. 59
FSDK_GetMatchingThresholdAtFRR Function .............................................................................................. 60
Gender and Facial Expression Recognition ......................................................................... 61
FSDK_DetectFacialAttributeUsingFeatures Function ..................................................................................... 61
FSDK_GetValueConfidence Function ............................................................................................................. 62
Working with Cameras .......................................................................................................... 63
Data Types ....................................................................................................................................................... 64
FSDK_InitializeCapturing Function ................................................................................................................ 65
FSDK_FinalizeCapturing Function .................................................................................................................. 65
FSDK_SetCameraNaming Function ................................................................................................................ 66
FSDK_GetCameraList Function ...................................................................................................................... 67
FSDK_GetCameraListEx Function .................................................................................................................. 68
FSDK_FreeCameraList Function ..................................................................................................................... 68
FSDK_GetVideoFormatList Function ............................................................................................................. 69
Copyright © 2005–2015 Luxand, Inc. http://www.luxand.com
4
FSDK_FreeVideoFormatList Function ............................................................................................................ 70
FSDK_SetVideoFormat Function .................................................................................................................... 70
FSDK_OpenVideoCamera Function ................................................................................................................ 71
FSDK_OpenIPVideoCamera Function ............................................................................................................ 72
FSDK_SetHTTPProxy Function ...................................................................................................................... 73
FSDK_GrabFrame Function ............................................................................................................................ 73
FSDK_CloseVideoCamera Function ............................................................................................................... 74
Tracker API: Face Recognition and Tracking in Video Streams ...................................... 75
What is Tracker API ......................................................................................................................................... 75
Understanding Identifiers ................................................................................................................................. 77
A subject can have several identifiers ......................................................................................................... 77
Merger of identifiers .................................................................................................................................... 77
When identifiers are not merged ................................................................................................................. 78
Similar identifiers ........................................................................................................................................ 78
Tracker Memory ............................................................................................................................................... 78
Memory available for each subject.............................................................................................................. 78
Imposing memory limits .............................................................................................................................. 79
How to set the memory limit ........................................................................................................................ 79
Tracker Parameters ........................................................................................................................................... 79
Face tracking parameters ............................................................................................................................ 79
Face recognition parameters ....................................................................................................................... 80
Facial feature tracking parameters ............................................................................................................. 80
Tuning for Optimal Performance ..................................................................................................................... 81
Using the API ................................................................................................................................................... 81
Locking identifiers ....................................................................................................................................... 82
Multiple camera support ............................................................................................................................. 82
Usage Scenario ............................................................................................................................................ 82
User Interaction with the System ..................................................................................................................... 83
Enrollment ................................................................................................................................................... 83
Dealing with false acceptances ................................................................................................................... 84
Saving and Loading Tracker Memory .............................................................................................................. 84
Recognition Performance ................................................................................................................................. 85
Performance measures ................................................................................................................................ 85
Understanding storage events ..................................................................................................................... 85
How to measure your rate of storage events ............................................................................................... 85
Understanding FAR ..................................................................................................................................... 85
Understanding R .......................................................................................................................................... 86
Choosing Threshold value ........................................................................................................................... 86
Gender and Facial Expression Recognition...................................................................................................... 87
Face, Eye and Facial Feature Tracking ............................................................................................................ 88
Counting the number of people ................................................................................................................... 88
Thread Safety ................................................................................................................................................... 88
FSDK_CreateTracker Function ........................................................................................................................ 88
FSDK_FreeTracker Function ........................................................................................................................... 89
FSDK_ClearTracker Function ......................................................................................................................... 90
FSDK_SetTrackerParameter Function ............................................................................................................. 90
FSDK_SetTrackerMultipleParameters Function .............................................................................................. 91
FSDK_GetTrackerParameter Function ............................................................................................................ 92
FSDK_FeedFrame Function............................................................................................................................. 93
FSDK_GetTrackerEyes Function ..................................................................................................................... 93
FSDK_GetTrackerFacialFeatures Function ..................................................................................................... 94
FSDK_GetTrackerFacePosition Function ........................................................................................................ 95
FSDK_GetTrackerFacialAttribute Function .................................................................................................... 96
FSDK_LockID Function .................................................................................................................................. 97
FSDK_UnlockID Function............................................................................................................................... 98
FSDK_GetName Function ............................................................................................................................... 99
FSDK_SetName Function .............................................................................................................................. 100
FSDK_GetIDReassignment Function ............................................................................................................ 100
FSDK_GetSimilarIDCount Function ............................................................................................................. 101
FSDK_GetSimilarIDList Function ................................................................................................................. 102
Copyright © 2005–2015 Luxand, Inc. http://www.luxand.com
5
FSDK_GetAllNames Function ....................................................................................................................... 103
FSDK_SaveTrackerMemoryToFile Function ................................................................................................ 104
FSDK_LoadTrackerMemoryFromFile Function ........................................................................................... 104
FSDK_GetTrackerMemoryBufferSize Function ........................................................................................... 105
FSDK_SaveTrackerMemoryToBuffer Function ............................................................................................ 106
FSDK_LoadTrackerMemoryFromBuffer Function ....................................................................................... 107
Multi-Core Support .............................................................................................................. 107
FSDK_GetNumThreads Function .................................................................................................................. 108
FSDK_SetNumThreads Function ................................................................................................................... 109
Thread Safety ........................................................................................................................ 109
Migration from FaceSDK 5.0.1 ........................................................................................... 110
Error Codes .......................................................................................................................... 110
Library Information ............................................................................................................ 111
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