Camera failures usually come from permission settings, another active camera session, poor lighting, or an image without clear document boundaries.

Checks to make

  1. If diScanner shows Camera access is denied. Please enable it in settings, choose Open Settings and enable Camera access.
  2. Close other apps actively using the camera and reopen diScanner.
  3. Place the page on a plain, contrasting surface.
  4. Add even light and hold the device parallel to the page.
  5. Restart the device if the camera preview remains unavailable in every app.

What the result tells you

  • Document detection and crop review are provided by the iOS document-camera interface. If only edge detection is unstable, capture manually and adjust the corners during review.
  • If every image is blurred, clean the lens and test the built-in Camera app.

Before trying again

  • Do not repeatedly capture while the device is still refocusing.
  • For curled receipts, flatten the page without covering its edges.