Anatomy & hands check
Find the sixth finger before the internet does
Anatomy mistakes are the most screenshotted AI failure there is. Hands with extra fingers, thumbs on the wrong side, arms that bend backwards, teeth that merge into one — audiences spot them instantly, and they read as carelessness. Chekr inspects every person in the creative limb by limb.
What anatomy errors look like
- Hands with six or more fingers, or fingers that fork mid-length
- Thumbs on both sides of a hand, or hands attached at odd angles
- Elbows and knees bending against the joint
- Ears, teeth or eyes that duplicate or merge
- Limbs that belong to no one in group shots
How Chekr checks it
The anatomy pass zooms into hands, faces and joints — the regions models get wrong most — and checks that what it finds is anatomically possible. Each violation is pinned with a bounding box, severity and confidence, so you can judge it at a glance instead of playing spot-the-difference.
Anatomy findings typically carry an inpaint fix: Chekr regenerates just the marked region (the hand, not the person), composites it back over the original and runs a before/after judgement that rejects the fix if it changed identity or introduced new issues.
Frequently asked
Why do AI images get hands wrong?
Hands are small, highly articulated and appear in thousands of poses, so the training signal for any single configuration is weak. Models average across poses and produce plausible-at-a-glance, wrong-on-inspection results.
Can it check crowds and group shots?
Yes — every visible person is checked. Small background figures are held to a proportionate standard: a smudged face at 20 pixels is noted differently than a six-fingered hand in the foreground.
What happens after a fix?
You can re-run the full scan on the corrected image. The score updates, the version history records the change, and a score-drop guardrail warns you if the fix made the creative worse overall.