Image Validation Requirements

Warning

It is crucial to be aware of the maximum size limit for the request body. The maximum request size limit should not exceed 3MB. If the limit is exceeded, the application will return error 413.

Requirements for sending face images are as follows:

Datavalid's Face Recognition module requires images that have a minimum resolution of 250 x 250 pixels. The service allows for the use of JPG, PNG, and PDF images. The accuracy index of the algorithm depends directly on the quality of the image sent.

The minimum resolution of 250 x 250 px applies specifically to the area containing the face image, not the entire image including any empty background.

Examples of images of faces

Reference standard of face images

We suggest using the ICAO standard as the reference quality standard for the photos that will be sent to the service. In instances where the face images do not adhere to the ICAO standard, the service may not achieve its highest level of accuracy. Requests may be rejected by the Quality Checker or may produce results that are considered untrustworthy.

The return code list of rejected requests can be accessed from the error code list

The following are some of the typical issues with face images that should be dealt with or remedied before sending them to the service.

Source: https://www.icao.int/Security/FAL/TRIP/Pages/default.aspx

Requirements for sending fingerprints images

The Datavalid Fingerprints Validation module requires images with a resolution of at least 500 DPI (dots per inch). We recommend using an image with dimensions of 640 x 600 pixels (height x width) before any cropping is done. ISO, JPG, PNG, or WSQ formats are supported.

High Quality Fingerprint Image Example