Windows face recognition

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Delivered Mondays and Wednesdays. Sign up today. Windows Hello face authentication utilizes a camera specially configured for near infrared IR imaging to authenticate and unlock Windows devices as well as unlock your Microsoft Passport. The two primary scenarios for Windows Hello face authentication in Windows 10 are authentication to log on or unlock, and re-authentication to prove you are still there.

The Windows Hello face recognition engine consists of four distinct steps that allow Windows to understand who is in front of the sensor:.

Using the landmark locations as anchor points, the algorithm takes thousands of samples from different areas of the face to build a representation. The representation at its most basic form is a histogram representing the light and dark differences around specifics points. No image of the face is ever stored — it is only the representation.

Once there is a representation of the user in front of the sensor, it is compared to the enrolled users on the physical device. The representation must cross a machine-learned threshold before the algorithm will accept it as a correct match. If there are multiple users enrolled on the system, this threshold will increase accordingly to help ensure that security is not compromised. Enrollment is the step of generating a representation or set of representations of yourself for example if you have glasses you may need to enroll with them and without them and storing them in the system for future comparison.

This collection of representations is called your enrollment profile. Microsoft never stores an actual image and your enrollment data is never sent to websites or applications for authentication. Most users will likely need to enroll once per device. Additional enrollments are needed for users that:. After the release of face recognition with the first Kinect on Xbox , Microsoft learned that relying on ambient light to provide a consistent image provided a poor user experience.

People live and work in a variety of environments, with an assortment of lighting conditions. Traditional color recognition systems rely on turning up the brightness, exposure, or other settings to create a useable image — all of which expose artifacts that impact the robustness of the system. In contrast, near infrared images are consistent across ambient lighting scenarios, as you can see below. Using IR also helps with spoofing because it helps prevent the most accessible attacks.

For instance, IR doesn't display in photos because it's a different wavelength, and as you can see below, the images the images do not display in photos or on an LCD display.

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No image of the face is ever stored — it is only the representation. Once there is a representation of the user in front of the sensor, it is compared to the enrolled users on the physical device.

The representation must cross a machine-learned threshold before the algorithm will accept it as a correct match. If there are multiple users enrolled on the system, this threshold will increase accordingly to help ensure that security is not compromised. Enrollment is the step of generating a representation or set of representations of yourself for example if you have glasses you may need to enroll with them and without them and storing them in the system for future comparison.

This collection of representations is called your enrollment profile. Microsoft never stores an actual image and your enrollment data is never sent to websites or applications for authentication. Most users will likely need to enroll once per device. Additional enrollments are needed for users that:.

After the release of face recognition with the first Kinect on Xbox , Microsoft learned that relying on ambient light to provide a consistent image provided a poor user experience. People live and work in a variety of environments, with an assortment of lighting conditions. Traditional color recognition systems rely on turning up the brightness, exposure, or other settings to create a useable image — all of which expose artifacts that impact the robustness of the system.

In contrast, near infrared images are consistent across ambient lighting scenarios, as you can see below.

Using IR also helps with spoofing because it helps prevent the most accessible attacks. For instance, IR doesn't display in photos because it's a different wavelength, and as you can see below, the images the images do not display in photos or on an LCD display.

When Microsoft talks about the accuracy of Windows Hello face authentication, there are three primary measures used: False Positives, True Positives, and False Negatives.

Accounting for errors in measurement is important, so Microsoft categorizes them in two ways: bias errors systematic errors and random errors sampling. Bias errors may occur as a result of not using data that is representative of the environments and the conditions in which the algorithm is used. This type of error can result from different environmental conditions such as lighting, angle to sensor, distance, and so on as well as hardware that is not representative if shipping devices.

For example, focusing on a small set of faces without glasses, beards, or unique facial features. Turn on Use my sign-in info to automatically finish setting up after an update if you want to use your sign-in info to automatically finish setting up your device after an update or restart. Select Password , and then select Change. Select the Windows Hello method you want to remove, and then select Remove. For more information see Learn about Windows Hello and set it up.

Under Require sign-in , select an option for when Windows should require you to sign in again. Under Privacy , turn the first setting On if you want to show your account details on the sign-in screen.

Under Privacy , turn the second setting On if you want to use your sign-in info to automatically finish setting up your device after an update or restart. The keys to the kingdom - securing your devices and accounts. Microsoft security help and learning. Related topics. Windows account help. Sign in. Windows Hello. Reset your password. Reset your PIN. Manage accounts on your PC. Sign in with Microsoft. You have multiple accounts. Privacy Windows 11 Windows 10 More Select Password then select Change.

Windows Hello Windows Hello lets you sign in to your devices, apps, online services, and networks using your face, iris, fingerprint, or a PIN.

See also The keys to the kingdom - securing your devices and accounts Microsoft security help and learning. Need more help? Was this information helpful? Yes No. Thank you! Any more feedback? The more you tell us the more we can help. Can you help us improve? Resolved my issue. Clear instructions. Easy to follow. No jargon. Pictures helped.