https://learn.microsoft.com/en-us/uwp/api/windows.ui.xaml.media.imaging.bitmapimage.decodepixeltype?view=winrt-28000
BitmapImage.DecodePixelType Property (Windows.UI.Xaml.Media.Imaging) - Windows apps | Microsoft...
Gets or sets a value that determines how DecodePixelWidth and DecodePixelHeight values are interpreted for decoding operations.
bitmapimagepropertywindowsuixaml