The card is a visual reference
Use the printed ruler for your own visual comparison. Print at 100% and check it against a physical ruler. The current software does not read the printed millimetres to set image scale.
Know your scale
A clear photo starts with the right setup.
For field photos, Paystreak estimates scale from a detected pan circle and the selected pan-size profile. Choose the correct pan size and review the reported scale source. The printed card is a visual reference, not automatic calibration.
See how to take the photo
Field cardPrint at 100% scale
The markers are not detected
The current software does not detect the card’s black markers or use them to check tilt, blur, or camera distance. Keep the camera square to the pan and inspect the photo yourself.
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
Take a useful sample photo
- Clean the recovered gold and spread particles so they do not touch.
- Photograph straight down with the full pan in frame. Use even light and avoid glare, blur, and hard shadows.
- If using the field card, lay it flat beside the gold for visual reference. It does not automatically calibrate the photo.
- Upload the original image without cropping or resizing. Choose Field photo and select the correct pan size.
- Review the reported scale source before using weight or grade estimates. A pan_inner_flat result uses a detected pan circle and an assumed pan-size profile, not card detection.
- If the source is fallback_uncalibrated, scale detection failed. Do not treat the weight or grade as calibrated; retake the photo and check the pan-size selection.
- For a DPI scan, choose DPI scan and check the source. DPI scaling may use image metadata or an assumed DPI value; an assumed value is not a verified scanner calibration.