C# Ghostscript.NET.Rasterizer设置分辨率（Dpi）不工作

我有这个代码将pdf转换为tif，它比ImageMagick库更快，所以我必须使用它。每一个 事情进展顺利，但当我设置x和y dpi时，它总是被忽略。我尝试了不同版本的NuGet GhostScript，也尝试了不同版本的GhostScript.exe，但仍然存在相同的问题

这是我的密码：

        var xDpi = 300; //set the x DPI
        var yDpi = 300; //set the y DPI

        using (var rasterizer = new GhostscriptRasterizer()) //create an instance for GhostscriptRasterizer
        {

            rasterizer.Open(fileName); //opens the PDF file for rasterizing
            int PdfPages = rasterizer.PageCount;
            for (int pageNumber = 1; pageNumber <= rasterizer.PageCount; pageNumber++)
            {
                //set the output image(png's) complete path
                string outputPNGPath = Path.Combine(fileNameResultDirectory, "00" + pageNumber.ToString() + ".tif");


                //converts the PDF pages to png's 
                Image pdf2PNG = rasterizer.GetPage(xDpi, yDpi, pageNumber);//it gets ignored here.

                //save the png's
                pdf2PNG.Save(outputPNGPath, ImageFormat.Tiff);
            }



        }

还尝试：

 rasterizer.CustomSwitches.Add("-r300x300");

      private static void Test()
        {
            var localGhostscriptDll = Path.Combine(Environment.CurrentDirectory, "gsdll64.dll");
            var localDllInfo = new GhostscriptVersionInfo(localGhostscriptDll);

            int desired_x_dpi = 160;
            int desired_y_dpi = 160;

            string inputPdfPath = @"d:\d.pdf";

            string outputPath = @"d:\Test\test.jpg";

            GhostscriptRasterizer _rasterizer = new GhostscriptRasterizer();

            _rasterizer.Open(inputPdfPath, localDllInfo, false);

            for (int pageNumber = 1; pageNumber <= _rasterizer.PageCount; pageNumber++)
            {
                string pageFilePath = Path.Combine(outputPath, "Page-" + pageNumber.ToString() + ".png");

                Image img = _rasterizer.GetPage(desired_x_dpi, desired_y_dpi, pageNumber);
                img.Save(pageFilePath, ImageFormat.Png);
            }

            _rasterizer.Close();
        }

private静态无效测试（）
{
var localGhostscriptDll=Path.Combine（Environment.CurrentDirectory，“gsdll64.dll”）；
var localDllInfo=新GhostscriptVersionInfo（localGhostscriptDll）；
int所需的_x_dpi=160；
int所需的_y_dpi=160；
字符串inputPdfPath=@“d:\d.pdf”；
字符串outputPath=@“d:\Test\Test.jpg”；
GhostscriptRasterizer _rasterizer=新的GhostscriptRasterizer（）；
_打开（inputPdfPath，localDllInfo，false）；
对于（int pageNumber=1；pageNumber）