how to detect edge of paper in ios?

Question

how to do edge-detection in ios?

I want to use camera to capture paper and remove the other info. just leave the paper.

Answer 1

To do this you can use the Vision framework along with Core Image. It involves the following steps:

Set up the camera capture session-Use the AVCaptureSession for this.

Perform edge detection using VNDetectRectanglesRequest.

Process the detected rectangle.

Crop and perspective-correct the image.