Image Guidelines
For the Sybrin Biometrics Web SDK to work at its full potential it is important to follow the image input guidelines as stated below. Each section contains good and bad examples to help visualize any issues you might experience regarding bad lighting, misalignment, focus, etc.
Angle
The face should not be tilted or turned more than 10 degrees in any direction or orientation.
Correct
Incorrect - tilted left
Incorrect - turned sideways
Incorrect - tilted upwards
Incorrect - tilted downwards
Distance
Ensure that the face does not take up too much or too little of the screen real-estate. A good ratio to aim for is to keep the face between 50% and 70% of the screen real-estate.
Correct
Incorrect - too close
Incorrect - too far
Focus
The face should be in focus and not blurred.
Correct
Incorrect
Lighting
Ensure the image has proper lighting. Avoid over exposure, under exposure, too much or too little background or foreground lighting, glares, and reflections.
Background lighting
Light coming from behind the subject can affect with the lighting conditions on the face, interfering with the normal operations of the SDK.
Correct
Incorrect - digital white
Incorrect - normal light
Incorrect - sun
Over exposure
Correct
Incorrect
Split lighting
Improper light balance or shadows on the face, can interfere with the normal operations of the SDK.
Correct
Incorrect
Under exposure
Correct
Incorrect
Obstructions
Remove all facial accessories and obstructions, as these can prevent the SDK from detecting all the necessary facial details. These include, but are not limited to:
Glasses
Hats
Headphones
Hoodies
Masks
Hair in front of the face
Correct
Incorrect
Incorrect - glasses
Incorrect - hat
Incorrect - headphones
Incorrect - hoodie
Incorrect - mask
Position
The face should be centered in the middle of the frame and no details should be cut off.
Correct
Incorrect - off center
Incorrect - cutoff
Resolution
The image resolution should be following the SDK requirements.
Correct
Incorrect
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