如何在 Xamarin Forsm 中打开图像并将其与 EmguCv/OpenCvSharp 一起使用？

Question

I'm developing an app in Xamarin Forms, I need to process images, but I could not do it either OpenCvSharp or EmguCv.

When I try to open the image sending the path, it does not work and crashes:

Here is my code:

var file = await CrossMedia.Current.PickPhotoAsync(new PickMediaOptions
            {
                CompressionQuality = 100,
                PhotoSize = PhotoSize.Large
            });    
Mat OriginalImage = new Mat(file.Path, ImreadModes.AnyColor);

When I run my app, does not work.

Do you know any solution or any tutorial to follow?

Answer 1

I'm not really familar with OpenCvSharp, but if you want to do it in Emgucv, you can use the following code.

//Create a string to hold the file location
string fileLocation;

//Create an openfiledialog object to select a photo
OpenFileDialog dialog = new OpenFileDialog
{
    InitialDirectory = Directory.GetParent(Directory.GetParent
        (Environment.CurrentDirectory).ToString()).ToString(),
    Title = "Browse Images",

    CheckFileExists = true,
    CheckPathExists = true,

    FilterIndex = 2,
    RestoreDirectory = true,

    ReadOnlyChecked = true,
    ShowReadOnly = true
};

if (dialog.ShowDialog() == true)
{
    fileLocation = dialog.FileName;

    Mat input = CvInvoke.Imread(fileLocation, ImreadModes.AnyColor);
}