> For the complete documentation index, see [llms.txt](https://docs.faceki.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.faceki.com/quick-guides/image-guidelines.md).

# Image Guidelines

Poor image quality may result in errors. Therefore, to reduce errors, note the following:

* Motion blur effect can significantly increase BPCER (Bona Fide Presentation Classification Error Rate) or the rate of errors classifying a live person as a spoof.
* Fish-eye lenses are not supported by FACEKI.
* FACEKI does not accept any fade, blur, not clear face image, two persons in a photo, stretch dimensions, or filtered pictures.
* Texture filtering can significantly increase APCER (Attack Presentation Classification Error Rate) or the errors of allowing impostors through.
* Spotlights on the faces and nearest surroundings can significantly increase BPCER.
* Ill-lighted environment and colored lights can significantly increase BPCER.
* Appropriate distance is required to capture the face image to comply with the requirements below. Please ensure that inter-pupillary distance, face size, and recommended face proportion on the image are preserved.
* The face should have proper lighting and should fit in the oval with a proper ratio and dimensions. 
* FACEKI does not recognize small-dimension images.

### Correct Sample

<figure><img src="/files/v2yqM4Do7kglLBENIb9N" alt=""><figcaption><p>Selfie Valid Sample</p></figcaption></figure>

###

<figure><img src="/files/jkWvstc104aK9aeXPanq" alt=""><figcaption><p>Oval with a proper ratio and dimensions</p></figcaption></figure>

### Invalid Sample

<figure><img src="/files/aOuOqXudpTe94eApcAkM" alt=""><figcaption><p>Selfie Invalid Sample</p></figcaption></figure>

### Card Images Guidelines:

Please find the reference samples below:

<figure><img src="/files/XVvqVXOIFcQoQcBghuPs" alt=""><figcaption><p>Make sure your hand is not covering details</p></figcaption></figure>

<figure><img src="/files/apkHcwBsbsyivKNrrXcT" alt=""><figcaption><p>Avoid light reflection on the card</p></figcaption></figure>

<figure><img src="/files/K68xwbzXs4AXTQOVgD0M" alt=""><figcaption><p>Picture must be clear, in focus and not blurry</p></figcaption></figure>

<figure><img src="/files/Likfctpb2VemVHNArK4y" alt=""><figcaption><p>Should show all details</p></figcaption></figure>

### Correct Sample:

<figure><img src="/files/irXc8A7OUNMFOZCUva4Y" alt=""><figcaption><p>Find an area with good lighting</p></figcaption></figure>

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