The ruler shows true size
Paystreak uses the printed millimetres to turn photo pixels into real measurements and a better gold-weight estimate.
Why the card matters
The card works like a ruler for your photo.
A gold piece looks bigger when the camera is closer. Put this card beside the gold and Paystreak can tell the real size of each piece, making the weight estimate more useful.
See how to take the photo
Field cardPrint at 100% scale
The black squares check the angle
They help Paystreak find the card and warn when the camera is tilted, too blurry, or too far away.
The circles show mesh size
Compare your gold with the printed circles for a quick visual check of how coarse or fine the sample is.
Capture protocol
How to use it
- Clean the gold and spread particles so they do not touch.
- Place the card flat in the same plane as the gold.
- Use even light; avoid glare and hard shadows.
- Hold the camera square to the surface and include the full ruler and both markers.
- Upload the original photo without cropping or resizing.