1. 请点击以下链接下载 WinHEC 的演讲材料 Download WinHEC presentations here: http://channel9.msdn.com/Events/WinHEC/2015

7. Windows 10 introduces a new authentication grade Face Recognition and identification mechanism to authenticate and unlock Windows devices as well as access to Next Gen Credential (NGC) supported content, without the need of a password or additional authentication factors.

8. Facial recognition across compatible devices running Windows 10 A user friendly interface that provides single sign on capabilities without need of additional passwords or authentication credentials Enterprise grade authentication and access to NGC supported content, including network resources, websites and purchasing content Integrated anti-spoofing countermeasures to mitigate physical attacks – e.g. unauthorized device logon and access The ability to provide a consistent image (via IR) in diverse lighting conditions and allows for subtle changes in appearance including facial hair, cosmetic makeup, eyewear, etc.

9. Three primary use cases

18. ItemRequirementDescription Mount LocationTop middle in preferred device orientationOptimal location for sensor and illumination to be mounted. Resolution60 horizontal IR pixels across a 15 cm object @ max rangeRepresents the average head size and how many pixels across the face are required. a. Field of View >= 60 degrees horizontal >= 60 degrees vertical * Could vary depending on form factor of device and expected user scenario The field of view required to obtain an optimal user experience. Range 30cm-100cm for pc/tablet 20cm-80cm for mobile The maximum and minimum distance required for an optimal user experience. One Frame Pair Rate >= 15 FPSFrame rate for the combined frame pair. Total Exposure Time for Frame Pair <= 33msTo reduce potential blurring in the frame pair, see more detailed definition below. DistortionCorrected to < 5.5% errorLens distortion that is acceptable across entire field of view. Modulation Transfer Function (MTF) 50% @ ½ Nyquist over entire FOVClarity of image across entire field of view. Dynamic Range @ min range will not saturate skin (60% diffuse reflectivity) @ max range satisfy IRSNR requirement The acceptable range at minimum and maximum distances. Startup Time<400msThe time the sensor must come online and begin sending frames through ISourceProvider IRSNR (Daylight)30 over the entire FOVSee definition of IR SNR below. IRSNR (Indoor)30 over the entire FOVSee definition of IR SNR below. Filter+/- 30nm of your wavelengthBand-pass filter used to eliminate frequencies of IR not put out by the illuminator (sun, lights, etc.). Uniformity of Illumination Illumination light shall be distributed so the Relative illumination on the sensor does not fall below 30% of the Peak Value Consistency across field of view while device is held at difference angles. Illumination Wavelength840nm-870nmThe required specific range to assist with Anti-Spoofing features. Illumination LevelMeets Class 1 safety requirementsWindows required regardless of LED or Laser illumination source to ensure consumer safety. Stray light ghost images and/or hot spots must be less than 0.1% of the imaging path Stray light tolerance. Indoor Ambient Light< 1uW/cm2/nmRecommended indoor ambient illumination for test purposes. Outdoor Ambient LightWhere the screen becomes unreadable Outdoor light tolerance.

21. EnvironmentIndoor OfficeOffice with WindowLiving RoomKitchenOutdoor ShadeOutdoor Sun DescriptionTypical indoor office environment with overhead florescent lighting Executive office with overhead florescent lighting and floor to ceiling windows Dim lighting with 40w- 60w table lights Strong ambient light from windows Ambient light from the surrounding area Strong ambient light, possible glare from sun depending on time of day

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