C# OpenCV学习笔记四之图像二值化

图像分析最主要的一步就是二值化，先灰度化，后二值话，相关代码如下

            Image<Bgr, Byte> imageSource = new Image<Bgr, byte>((Bitmap)loadPictureBox.Image);
            Image<Gray, Byte> imageGrayscale = imageSource.Convert<Gray, Byte>();
            if (loadPictureBox.Image != null)
            {
                loadPictureBox.Image.Dispose();
                loadPictureBox.Image = null;
            }
            loadPictureBox.Image = imageGrayscale.ToBitmap();

            Image<Gray, Byte> imageThreshold = imageGrayscale.ThresholdBinary(new Gray(128), new Gray(255));
            if (loadPictureBox.Image != null)
            {
                loadPictureBox.Image.Dispose();
                loadPictureBox.Image = null;
            }

            loadPictureBox.Image = imageThreshold.ToBitmap();

 方法二

            Image<Gray, Byte> dest = new Image<Gray, Byte>(imageGrayscale.Width, imageGrayscale.Height);

            CvInvoke.cvThreshold(imageGrayscale, dest, 30, 255, Emgu.CV.CvEnum.THRESH.CV_THRESH_BINARY);

            loadPictureBox.Image = dest.ToBitmap();