Applying gray scale on an Image in WPF

The FormatConvertedBitmap is used to apply formatting on images in WPF. The FormatConvertedBitmap.Source property is a BitmapImage that will be used in the formatting process.

This code creates a BitmapImage.

BitmapImage bitmap = new BitmapImage(); bitmap.BeginInit(); bitmap.UriSource = new Uri(@"C:\Books\Book WPF\How do I\ImageSample\ImageSample\Flower.JPG"); bitmap.EndInit();

This code snippet creates a FormatConvertedBitmap from the BitmapImage created above.

FormatConvertedBitmap grayBitmapSource = new FormatConvertedBitmap(); grayBitmapSource.BeginInit(); grayBitmapSource.Source = bitmap;

 The DestinationFormat property of FormatConvertedBitmap is used to apply formatting on images. The follow code snippet sets the formatting of an image to gray.

grayBitmapSource.DestinationFormat = PixelFormats.Gray32Float;    grayBitmapSource.EndInit();

The complete source code looks like this.

private void GrayScaleButton_Click(object sender, RoutedEventArgs e) {     // Create a BitmapSource     BitmapImage bitmap = new BitmapImage();     bitmap.BeginInit();     bitmap.UriSource = new Uri(@"C:\Books\Book WPF\How do I\ImageSample\ImageSample\Flower.JPG");     bitmap.EndInit();       // Create a FormatConvertedBitmap     FormatConvertedBitmap grayBitmapSource = new FormatConvertedBitmap();       // BitmapSource objects like FormatConvertedBitmap can only have their properties     // changed within a BeginInit/EndInit block.     grayBitmapSource.BeginInit();       grayBitmapSource.Source = bitmap;       // Key of changing the bitmap format is DesitnationFormat property of BitmapSource.     // It is a type of PixelFormat. FixelFormat has dozens of options to set     // bitmap formatting.     grayBitmapSource.DestinationFormat = PixelFormats.Gray32Float;     grayBitmapSource.EndInit();       // Create a new Image     Image grayImage = new Image();     grayImage.Width = 300;     // Set Image source to new FormatConvertedBitmap     grayImage.Source = grayBitmapSource;       // Add Image to Window     LayoutRoot.Children.Add(grayImage);   }