Face Detection & Face Recognition Input Images

The face detection and recognition models used in our API are designed to work for a wide variety of poses, facial expressions, age ranges, rotations, lighting conditions, and sizes. To ensure the best performance of the API, we recommend the following guidelines when selecting images for face detection and recognition operations.

Image Guidelines

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. We recommend yaw of fewer than 10 degrees in either direction.
Use an image of a face with both eyes open and visible.
Use an image of a face that is not obscured or tightly cropped. The image should contain the full head and shoulders of the person. It should not be cropped to the face bounding box.
Avoid items that block the face, such as headbands and masks.
Use an image of a face that occupies a large proportion of the image. Images, where the face occupies a larger portion of the image, are matched with greater accuracy.
Ensure an image is sufficiently large in terms of resolution. Signzy can recognize faces as small as 50x50 pixels in image resolutions up to 1920x1080. Higher-resolution images require a larger minimum face size. Faces larger than the minimum size provide a more accurate set of facial recognition results.
Use color images.
Use images with flat lighting on the face, as opposed to varied lighting such as shadows.
Use images that have sufficient contrast with the background. A high-contrast monochrome background works well.
Use images of faces with neutral facial expressions with mouth closed and little to no smile for applications that require high precision.
Use images that are bright and sharp. Avoid using images that may be blurry due to subject and camera motion as much as possible.
Make sure the orientation of the face is correct. Rotated faces might not work.
Each image size should be less than 2 MB.

Additional Instructions

For more detailed instructions on how to use our face detection and recognition API, please refer to the respective sections in our documentation portal. If you have any questions or need further assistance, please feel free to contact our support team.