Methodology
How the centering measurement works
Read the implemented guide geometry, left/right and top/bottom formulas, perspective transform, visual alignment aids, uncertainty sources, and current grading-reference caveats.
Is My Card Centered
Evidence before outcome
Trading Card Inspection Learning Center
This library supports distinct stages of one collector workflow. It does not exist to restate the same advice across many URLs. Start with the specific uncertainty you need to resolve, then move to the matching tool.
Worked example
Perspective correction case study
Follow one angled card photo from the original crop through four-corner setup, corrected workspace, manual guide review, and the recorded centering result.
Direct measurements
Manual Centering Calculator
Use ruler, caliper, scan, or image-editor border values when you already have four measurements and do not need guide-based photo alignment.
Evidence capture
Photograph cards for inspection
Prepare straight-on centering photos and separate angled-light surface evidence without confusing glare, sleeves, holders, or background edges with the card.
Condition workflow
Corner, edge, and surface inspection
Follow the same front/back evidence sequence used by Pre-Screen, distinguish observed findings from missing evidence, and know when a new photo is required.
Decision framework
Should you submit or hold?
Combine card condition, likely outcomes, population context, total cost, and your purpose after inspection—without treating a best-case price as the only scenario.
After the decision
Prepare an approved submission
Use an unbranded supply and packing checklist, then follow the selected grading company's current official shipping instructions.
Suggested sequence for one card
- Capture a straight-on front and back image with all four edges visible.
- Measure centering only where the design provides a repeatable printed boundary.
- Inspect corners, edges, and surface; mark anything hidden or skipped as not assessed.
- Use AI Review only as a separate, fallible second pass on visible evidence.
- Use population and cost context after the condition evidence, not as a substitute for it.
Editorial publisher: super_pjj. Grading-company standards and submission rules can change; links to official sources are provided on pages that discuss them.