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WPF, C#, MVVM Notify ViewModel dynamically in changes from Model

I have ViewModel that makes some functions. Funcs are initiate by button, i have command on button click.

ViewModel.cs

ViewModel.cs

class WindowViewModel : INotifyPropertyChanged
{
public WindowViewModel()

canExecute = true;


public ICommand ApplyKMMCommand //command for button click

get

return applyKMMCommand ?? (applyKMMCommand = new Commands.CommandHandler(() =>
ApplyKMMToNewImage(), canExecute));



private bool canExecute;
private ICommand applyKMMCommand;

public void ApplyKMMToNewImage()

ApplyKMM.Init(); //algorithm name





public event PropertyChangedEventHandler PropertyChanged;

private void NotifyPropertyChanged(string propertyName)

PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));


public BitmapImage DisplayedImage //displaying image that i work with

get return Bitmaps.Filepath;
set Bitmaps.Filepath = value; NotifyPropertyChanged(nameof(DisplayedImage));



Now, my ApplyKMM.Init()

ApplyKMM.Init()

class ApplyKMM


public static void Init()

Bitmaps.Filepath = //do some thing with it...




And my Models.Bitmaps.cs

Models.Bitmaps.cs

static public BitmapImage Filepath

get return filepath;
set filepath = value;


static private BitmapImage filepath get; set;


The problem is, when i make ApplyKMM.Init the Image control that is binded to View not change their value.

ApplyKMM.Init

Image

Without ApplyKMM i can do in ViewModel that thing:

ApplyKMM

DisplayedImage = //do things with bitmap...


And then, Image that is presented in View change (after making things with that image).

Image

Can you tell me, how to notify ViewModel, that somewhere in code filepath from Models changed?

filepath

EDIT:

Binding in View Looks like standard binding:

View

<Image Source="Binding DisplayedImage"/>


Button click works too, i have problem only with communication between Models->ApplyKMM->ViewModel

Models->ApplyKMM->ViewModel

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