是否可以使用ZXing.net创建QR码，而无需安静区域？

Question

（如何）可以使用ZXing.net创建QR码而没有安静区域？

这是我当前的代码：

BarcodeWriter barcodeWriter = new BarcodeWriter();

barcodeWriter.Format = BarcodeFormat.QR_CODE;
barcodeWriter.Renderer = new BitmapRenderer();

EncodingOptions encodingOptions = new EncodingOptions();
encodingOptions.Width = 500;
encodingOptions.Height = 500;
encodingOptions.Margin = 0;
encodingOptions.Hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);

barcodeWriter.Options = encodingOptions;

bitmap = barcodeWriter.Write(compressedText);

Answer 1

Zxing.net不支持反叠液缩放图像缩放。这意味着它只能通过整数值调整大小。在您的情况下，您应该创建最小的图像，并使用图像操纵库或框架中的位图和图形类调整所得图像。

var barcodeWriter = new BarcodeWriter
{
   Format = BarcodeFormat.QR_CODE
};
// set width and height to 1 to get the smallest possible representation without a quiet zone around the qr code
var encodingOptions = new EncodingOptions
{
   Width = 1,
   Height = 1,
   Margin = 0
};
encodingOptions.Hints.Add(EncodeHintType.ERROR_CORRECTION,    ErrorCorrectionLevel.L);

barcodeWriter.Options = encodingOptions;

var bitmap = barcodeWriter.Write(compressedText);
// scale the image to the desired size
var scaledBitmap = ScaleImage(bitmap, 500, 500);

private static Bitmap ScaleImage(Bitmap bmp, int maxWidth, int maxHeight)
{
  var ratioX = (double)maxWidth / bmp.Width;
  var ratioY = (double)maxHeight / bmp.Height;
  var ratio = Math.Min(ratioX, ratioY);
  var newWidth = (int)(bmp.Width * ratio);
  var newHeight = (int)(bmp.Height * ratio);
  var newImage = new Bitmap(newWidth, newHeight, PixelFormat.Format24bppRgb);
  using (var graphics = Graphics.FromImage(newImage))
  {
      graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
      graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
      graphics.DrawImage(bmp, 0, 0, newWidth, newHeight);
  }
  return newImage;
}