C ＃ +opencvsharp+wpf learning notes (I)

utilize opencvSharp Import image

One 、 Class libraries that need to be referenced

using OpenCvSharp;
using System.Drawing;
using System.IO;

Two 、 utilize opencv Open the picture

Mat img = new Mat(@"F:\lena.png", ImreadModes.Grayscale);
//Grayscale Is to introduce gray image , In addition, it can also be the original color image 
// there Mat Namely opencv Processed image format ,@ Followed by the path of the file , Change your path 
// Then you can use it directly imshow Show , But here we are going to use wpf Of image Control display 

3、 ... and 、Mat Format conversion Bitmap Bitmap

opencv There is a built-in function that can put Mat To Bitmap.

public Bitmap MatToBitmap(Mat img)
        {
            return OpenCvSharp.Extensions.BitmapConverter.ToBitmap(img);
        }

Four 、Bitmap turn BitmapImage

because wpf Of image Control can only display BitmapImage Type of picture , So turn to Bitmap after , You have to continue to convert to BitmapImage.
For processing a single picture , Just use the following method . But if there are multiple pictures , This will take up a lot of memory .
For details, please refer to the link : https://blog.csdn.net/chuangand/article/details/48031271.

public BitmapImage bitmapToimage(Bitmap bitimg)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                bitimg.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
                stream.Position = 0;
                BitmapImage result = new BitmapImage();
                result.BeginInit();
                result.CacheOption = BitmapCacheOption.OnLoad;
                result.StreamSource = stream;
                result.EndInit();
                result.Freeze();
                return result;
            }
        }

5、 ... and 、 stay wpf Of Image Control to display a picture

Click event function of Edit button , Make the picture appear on it .

Mat img = new Mat(@"F:\lena.png", ImreadModes.Grayscale);
Bitmap bitmap = MatToBitmap(img);
BitmapImage bitmapimg = bitmapToimage(bitmap);
imgshow.Source = bitmapimg;