PDF格式为PNG高分辨率 [英] PDF to PNG with high resolution

问题描述

我想转换为PDF文件，PNG，我要输出为595 * 842的高分辨率，

我用这个命令：

gswin64.exe -q -sDEVICE = png16m -dSAFER -dMaxBitmap = 10亿
-dTextAlphaBits = 4 -dGraphicsAlphaBits = 4 -dPDFFitPage =真 - sDEVICE = pngalpha -dBATCH -dNOPAUSE -sOutputFile = C：\cover.png C：\cover.pdf

我知道，我可以使用 -r300 但它将尺寸变为2479 * 3509
也有，我已经试过 -sPAPERSIZE = A4 + - R300 没有工作。

我怎么能在595x842的输出分辨率高？

当前代码：

  ProcessInfo =新System.Diagnostics.ProcessStartInfo（gswin64.exe， - q = -sDEVICE pngalpha -dBATCH -dNOPAUSE -sOutputFile = C：\\Users\\MNiyatkhair\\Desktop\\cairoCopy\\cover.png C：\\Users\ \MNiyatkhair\\Desktop\\cairoCopy\\Holding.pdf）; 
 // -r300 
 ProcessInfo.CreateNoWindow = TRUE; 
 ProcessInfo.UseShellExecute = TRUE; 
 ProcessInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; 
 =过程的Process.Start（ProcessInfo）; Process.WaitForExit（）; 
  

解决方案

您可以尝试增加图像的分辨率（例如-r（72 * 3）），并添加比例下限系数 -dDownScaleFactor = 3 。它会像原生PDF MatrixTransform。

I want to convert a PDF file to PNG, I want the output to be 595*842 with high resolution,

I used this command:

gswin64.exe -q -sDEVICE=png16m -dSAFER -dMaxBitmap=1000000000 -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -dPDFFitPage=true -sDEVICE=pngalpha -dBATCH -dNOPAUSE -sOutputFile=C:\cover.png C:\cover.pdf

I know that I can use -r300 but it will change the dimension to 2479*3509 also, I've tried -sPAPERSIZE=a4 + -r300 which didn't work.

How can I have the output in 595x842 with high resolution?

Current code:

ProcessInfo = new System.Diagnostics.ProcessStartInfo( "gswin64.exe", "-q -sDEVICE=pngalpha -dBATCH -dNOPAUSE -sOutputFile=C:\\Users\\MNiyatkhair\\Desktop\\cairoCopy\\cover.png C:\\Users\\MNiyatkhair\\Desktop\\cairoCopy\\Holding.pdf" ); 
// -r300 
ProcessInfo.CreateNoWindow = true; 
ProcessInfo.UseShellExecute = true; 
ProcessInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; 
Process = Process.Start(ProcessInfo); Process.WaitForExit(); 

解决方案

You can try to increase the image resolution (for example -r(72*3)) and add proportional downscale factor -dDownScaleFactor=3. It will work like native PDF MatrixTransform.

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