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Rescale BitmapSource
public static BitmapSource Resize(this BitmapSource source, int resolution)
{
var scale = resolution / source.DpiX;
// サイズ変更
var transformedBitmap = new TransformedBitmap();
transformedBitmap.BeginInit();
transformedBitmap.Source = source;
transformedBitmap.Transform = new ScaleTransform(scale, scale);
transformedBitmap.EndInit();
return transformedBitmap;
}
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