Edge Detection

The Document Scanner SDK uses computer vision to find the document’s edges in the image and crop it accordingly. Ideally, the user should move the camera close to the document, but not so close that its edges move off the screen. This ensures both that only the document itself is captured, and also that all of it is visible.

Edge detection helps the user by highlighting the document’s edges. This prevents text from being cut off and facilitates further image processing. All text in the input image can then be recognized using optical character recognition to turn the document into a searchable PDF.