Face Occlusion
Face Occlusion is a function to detect occluded objects to support verification business cases. The face occlusion algorithm is trained using facial features. The algorithm will check the face area on the forehead, right eyebrow, left eyebrow, right eye, left eye, right cheek, left cheek, nose, and mouth. If one of the facial features is occluded, the liveness will reject the selfie.
Facial attributes consist of forehead, eyebrows, eyes, cheeks, nose, and mouth.
The face occlusion algorithm is combined in our liveness check, it will be performed before the general liveness check. By this feature, we help you ensure the selfie image is visible with no occluded object on the selfie photo so that your verification process will be unbiased to identify your customer. Here the steps on our liveness check are enhanced by the occlusion check function.
Liveness Check Flow

Rejection Message on Passive Liveness API

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{
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"job": {
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"id": "4b4441eead2921862ddceebdce205b44ff50aac8960f5102GIYDEMJNGEZC2MBZ",
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"result": {
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"status": "incompleted",
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"analytic_type": "FACE_LIVENESS",
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"result": []
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}
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},
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"message": "the face is most likely occluded",
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"ok": true
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}
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Occlusion Behavior

The occluded objects, such as masks, sunglasses will be rejected by the algorithm.
Case
Accepted
Rejected
Woman with hijab
The selfie is accepted, all facial features are visible.
The selfie is rejected because the forehead and the eyebrow is occluded with the hijab
Eyeglassess
The selfie is accepted, all facial features are visible.
The selfie is rejected because the eyebrow is not visible, and the eyes are occluded by the phone reflection.
Hair on forehead
The selfie is accepted, while the left eye is half occluded. This condition might be accepted with our model, however, this condition should be avoided.
The selfie is rejected because the forehead and the eyebrow is occluded by the hair.
Another object occlusion
The selfie is accepted because all the facial features are visible.
The selfie is rejected because the half of the face is occluded by the hand

The Case that Might be False Accepted

Case
Example
Facial Paint or tattoo
Mask with face pattern