public DroidCvPattern(Stream Stream, bool MakeMask)
{
var buffer = new byte[Stream.Length];
using var ms = new MemoryStream(buffer);
Stream.CopyTo(ms);
using var raw = new DisposableMat(new MatOfByte(buffer));
if (MakeMask)
{
using var rgbaMat = new DisposableMat(Imgcodecs.Imdecode(raw.Mat, Imgcodecs.CvLoadImageUnchanged));
Mat = new Mat();
Imgproc.CvtColor(rgbaMat.Mat, Mat, Imgproc.ColorRgba2gray);
Mask = new Mat();
// Extract alpha channel
Core.ExtractChannel(rgbaMat.Mat, Mask, 3);
// Mask containing 0 or 255
Imgproc.Threshold(Mask, Mask, 0, 255, Imgproc.ThreshBinary);
}
else
{
Mat = Imgcodecs.Imdecode(raw.Mat, Imgcodecs.CvLoadImageGrayscale);
}
}
public DroidCvPattern(Stream Stream)
{
var buffer = new byte[Stream.Length];
using var ms = new MemoryStream(buffer);
Stream.CopyTo(ms);
using var raw = new DisposableMat(new MatOfByte(buffer));
Mat = Imgcodecs.Imdecode(raw.Mat, Imgcodecs.CvLoadImageGrayscale);
}