How can I overlay one image onto another?

c#, image, image-processing, overlay, wpf

Solution

You need a Panel to add both Image controls to. A Grid or Canvas will allow this, but I would go with the Grid as it will constrain the Image controls (thereby stretching or shrinking them as appropriate).

Image image = new Image();
image.Source = new BitmapImage(new Uri(@"c:\test\rectangle.png"));
image.Stretch = Stretch.None;
image.HorizontalAlignment = HorizontalAlignment.Left;

Image imageSticker = new Image();
imageSticker.Source = new BitmapImage(new Uri(@"c:\test\sticker.png"));
imageStiker.Margin = new Thickness(10, 10, 0, 0);

Grid grid = new Grid();
grid.Children.Add(image);
grid.Children.Add(imageSticker);

TheContent.Content = grid;

Problem

I would like to display an image composed of two images. I want image rectangle.png to show with image sticker.png on top of it with its left-hand corner at pixel 10, 10. Here is as far as I got, but how do I combine the images? ``` Image image = new Image(); image.Source = new BitmapImage(new Uri(@"c:\test\rectangle.png")); image.Stretch = Stretch.None; image.HorizontalAlignment = HorizontalAlignment.Left; Image imageSticker = new Image(); imageSticker.Source = new BitmapImage(new Uri(@"c:\test\sticker.png")); image.OverlayImage(imageSticker, 10, 10); //how to do this? TheContent.Content = image; ```

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