How to Photograph or Scan Your Cards for an Accurate Centering Check

Any at-home centering tool is only as good as the image you feed it. A tilted or glare-filled photo can make a perfectly centered card look off — or hide a real problem. Here’s how to capture a card so the measurement is trustworthy.

The golden rule: shoot straight-on

The single biggest source of bad centering numbers is a card photographed at an angle. Even a slight tilt stretches one border and shrinks the opposite one, throwing off the ratio. Hold the camera directly above the card, parallel to it, with the card flat — not propped at an angle.

Photo checklist

• Flat surface. Lay the card on a flat, dark, non-reflective surface so its edges stand out.
• All four corners in frame with a little space around the card — don’t crop the edges off.
• Even, soft light. Diffuse daylight or two lamps from the sides. Avoid a single harsh light or on-camera flash, which create glare and hot spots.
• No glare on the surface. Tilt the card slightly to kill reflections if needed — but take the measuring shot flat.
• Fill the frame, stay in focus. Get close enough that the card fills most of the frame, and tap to focus.

Phone photo vs flatbed scan

A careful phone photo is fine for centering. But a flatbed scanner is the gold standard: it captures the card perfectly flat and straight-on with even light, which removes tilt and glare almost entirely. If you have a scanner, place the card squarely in a corner of the glass and scan at 600 DPI. SlabWorthie has a dedicated flatbed-scan mode for exactly this.

Sleeves and toploaders

For the cleanest read, photograph or scan the raw card. A penny sleeve is usually fine, but thick toploaders and screw-downs can add glare and a second set of edges that confuse the measurement. If you must keep it protected, a thin sleeve beats a toploader.

Don’t forget the back

Graders judge both faces, and the back is often more off-center than the front. Capture the back the same careful way — the worse side is what caps the grade.

With a good image, you’re ready to measure. See how to check card centering and PSA centering standards, or just upload your photo to the free centering checker. Results are an estimate from your image, not a professional grade.