Best Practices

Before you use the Facial Recognition feature, we recommend that you upload an image that contains a full face and shoulders of the person. It is important to upload this first picture as a reference picture to help better identify pictures. Especially, for group photos. See below for sample images:


Here are some other items to consider when selecting a reference image. More information on the functionality of our Facial Recognition system can be found here as well. 


Metric  Fail Condition

Reason

Confidence c<98 A face must be used.
Quality
(brightness & sharpness)  
s<60 || b<30Use images that are bright and sharp.
Pose
(pitch, yaw && roll)
p<-30 || p>45
|| y<-45 || y>45
Use an image with a face that is within the recommended range of angles. The pitch should be less than 30 degrees face down and less than 45 degrees face up. The yaw should be less than 45 degrees in either direction. There is no restriction on the roll.
Eyes Open e>90 Use an image of a face with both eyes open and visible
Bounding Box
(left, top, width & height, all in ratio)
l<0.01 || t<0.01
|| l + w>0.99 || t + h>0.99
The image should contain the full head and shoulders of the person. It should not be cropped to the face bounding box.
w*h<0.01Use an image of a face that occupies a large proportion of the image. Images with a face that occupies a larger portion of the image, are matched with greater accuracy.
Emotion
(Happy: h; Calm: c; Other emotions)

{emotion not happy not calm} >90 || h<10 && c<10 

Use images of faces with neutral facial expressions with mouth closed with little to no smile for applications that require high precision.
Resolution
width & height in pixel
Width x Height <4000 Ensure that images are sufficiently large enough with respect to resolution.


To troubleshoot for Facial Recognition issue, please review our guide on Troubleshooting Facial Recognition.