Free AI Card Grading: What BAO Measures
Card grading is most useful when the overall number can be traced back to visible evidence. BAO separates centering, corners, edges and surface so collectors can see which area influenced an estimate and whether the photograph itself limited confidence. This guide explains what each category means, what a camera can and cannot show, and why a recapture can be more informative than forcing a score from weak evidence.
Photographic pre-grading
BAO Grade estimates visible card condition from front and back photos. It reports centering, corners, edges and surface evidence. Results help you inspect a card before deciding whether to submit it to a professional grading service.
Centering and perspective
Centering compares opposing printed borders on the physical card. BAO rectifies the card plane to reduce camera-angle distortion. Uncertain boundaries lower measurement confidence. An off-angle photograph is not proof of an off-center print.
Corners, edges and surface
Visible whitening, chips and corroborated wear can affect the estimate. Glare, blur, sleeves and slabs can hide or mimic damage. Straight-on photographs cannot rule out dents or fine scratches. Use the capture guide and directional lighting when requested.
Interpreting a BAO Grade
The provisional scale runs from 1 to 10. Look at confidence, subgrades and the evidence alongside the number. BAO is not calibrated to reproduce PSA, TAG, CGC, BGS or SGC grades and does not certify authenticity.
Free access
Create a free account, photograph both sides and analyze your card. There is no payment step. Fair-use scan limits keep the service available. Free grading requires a model-development license for submitted photographs and feedback. Read the terms before scanning.
Related card grading guides
Explore BAO grading tools and guides
All grading guides · Card photography · Centering explained · How BAO grades cards