Face Recognition
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5.5.1 Photo Requirements
For face recognition to work, it is required for the photos to meet the following criteria:
Each photo should consist of only one face.
Size of the face in the photo is around 120 ~
2
50 pixels.
The file size of the photo cannot exceed 350 KB.
Only JPG / JPEG format is supported.
Make sure the face of the person does not occupy more than 50% of the image.
See the examples below:
Best Example
Example of Failure - 1
Example of Failure - 2
The face occupies 50% of
the image. The size of the
person’s face is around
120 ~
2
50 pixels.
The face occupies more
than 50% of the image.
The size of the person’s
face is less than 120 pixels.
Figure 5-11
The accuracy of the face recognition can be improved by conforming to the suggestions
below:
Enroll 5 or more photos for each person with different angles
Make sure the lighting is sufficient to reduce shadows on faces.
Avoid glare from the glasses that obscures the eyes.
Take the photo of the person from a distance of about 1 ~ 1.5 meters (3.2 ~ 4.9 feet)
away from the camera to minimize image distortions.
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