How card photo quality affects print result

The final appearance of your photo on the delivered card depends more on your submitted photo than on the vendor's printing equipment. Here is how different photo characteristics translate to the printed result.

Resolution and print size

The photo zone on a standard license is approximately 25mm x 32mm. To print at 600 DPI — a common print resolution for fine ID card production — the required image resolution for that zone is about 591 x 756 pixels minimum. Most smartphone photos are at least 4000 x 3000 pixels, which provides far more data than needed. The issue is rarely resolution; it is crop quality and how the vendor's system handles the image.

Lighting effects on print quality

Shadows under the chin, around the nose, or on one side of the face appear darker in the printed photo than they appear on your screen. The printing process tends to exaggerate shadows. An evenly lit photo without visible shadows prints cleanly. A photo with shadow gradient across the face prints with exaggerated contrast that makes the photo look less natural.

Background color bleed

If your photo has a background color that is close in tone to your skin or clothing, the vendor's photo processing may not cleanly separate the subject from the background. This results in a halo or bleed effect at the boundary between you and the background. High contrast between subject and background — which is why specific background colors are specified — prevents this.

What you can check before submitting

View your photo on a monitor set to standard brightness, not a maximally bright phone screen. What you see on a standard monitor approximates what the print will look like better than a bright phone display. Look specifically for shadows, background uniformity, and sharpness at the face boundary. These are the three variables most likely to affect print quality and most within your control before submission.