rotation-detection.md

Sdcb.RotationDetector usage

Sdcb.RotationDetector is part of PaddleClas, it's based on PULC Classification Model of Text Image Orientation

Usage:

1. Install NuGet Packages:

   Sdcb.PaddleInference.runtime.win64.mkl
   Sdcb.RotationDetector
   OpenCvSharp4.runtime.win
   

2. Using following C# code to get result:

   using PaddleRotationDetector detector = new PaddleRotationDetector(RotationDetectionModel.EmbeddedDefault);
   using Mat src = Cv2.ImRead(@"C:\your-local-file-here.jpg");
   RotationResult r = detector.Run(src);
   Console.WriteLine(r.Rotation); // _0, _90, _180, _270
   
   // Restore to non-rotated:
   // r.RestoreRotationInPlace(src);