Merge pull request #172461 from PatrickFarley/face-updates

[cog svcs] detect 03 landmarks update

Author: PRMerger18

articles/cognitive-services/Face/ReleaseNotes.md

@@ -18,6 +18,14 @@ ms.custom: contperf-fy21q3, contperf-fy22q1
 
 The Azure Face service is updated on an ongoing basis. Use this article to stay up to date with new features, enhancements, fixes, and documentation updates.
 
+## July 2021
+
+### New HeadPose and Landmarks improvements for Detection_03
+
+* The Detection_03 model has been updated to support facial landmarks.
+* The landmarks feature in Detection_03 is much more precise, especially in the eyeball landmarks which are crucial for gaze tracking.
+
+
 ## April 2021
 
 ### PersonDirectory data structure

articles/cognitive-services/Face/concepts/face-detection.md

@@ -31,6 +31,8 @@ Face landmarks are a set of easy-to-find points on a face, such as the pupils or
 
 The coordinates of the points are returned in units of pixels.
 
+The Detection_03 model currently has the most accurate landmark detection. The eye and pupil landmarks it returns are precise enough to enable gaze tracking of the face.
+
 ## Attributes
 
 Attributes are a set of features that can optionally be detected by the [Face - Detect](https://westus.dev.cognitive.microsoft.com/docs/services/563879b61984550e40cbbe8d/operations/563879b61984550f30395236) API. The following attributes can be detected: