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.

Answer 2

Hello,

You can use VNDetectRectanglesRequest, and it indeed doesn't support the system below iOS11 (iOS11 is supported).

MAUI app that targets iOS platform can be written for iOS 11 or higher (the minimum support version is iOS11), so you can use vision kit and no need to worry about iOS version issues. See Supported platforms for .NET MAUI apps - .NET MAUI | Microsoft Learn

Best Regards,

Wenyan Zhang

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 3

To detect the edge of paper in iOS, you can utilize the Vision framework provided by Apple. By leveraging the VNDetectRectanglesRequest, you can detect rectangular shapes in an image, which is ideal for identifying paper edges. You'll need to capture an image, process it through the Vision framework, and analyze the results to find the edges of the paper. This process involves setting up a request handler, performing the rectangle detection, and handling the results to outline the paper's edges. Also, visit https://cashfrenzy-777.com/ for more.