如何将PDF文件中的页面图像向左或向右移动更多? [英] How can I shift page images in PDF files more to the left or to the right?

问题描述

我们有一堆扫描的页面(约600张)，每个PDF查看器在其右边缘显示零边距，在左边显示2英寸边距显示图像. (大概是在扫描时，使用了错误的设置...)

We have a bunch of scanned pages (about 600) for which every PDF viewer displays the image with zero margin on the right edge, but about 2 inch margin on the left. (Presumably while scanning, there was a wrong setting used...)

我们希望将这些页面打印为小册子.有没有办法将所有页面图像永久地移向中心，并让PDF以更令人满意的方式显示这些页面? Ghostscript可以做到吗?可以使用其他方法来做到这一点吗，例如在某些PDF处理库的帮助下进行编程?

We want to print these pages, preferably as a booklet. Is there a way to permanently shift all page images towards the center and have the PDF display these pages also in a more pleasing way? Can Ghostscript do that? Can one do this with some other method, such as programatically with the help of some PDF processing library?

推荐答案

如果您不想编写自己的程序代码(如Nikolaus所建议)，而是使用Ghostscript命令行，则需要了解3件事:

If you don't want to write your own program code (as Nikolaus suggested), but use a Ghostscript commandline instead, you need to know 3 things:

1. PostScript具有setpagedevice运算符，该运算符带有PageOffset参数；
2. 如果您在命令行上使用-c ...传递，Ghostscript将处理PostScript代码片段；
3. 即使直接进行 PDF => PDF 转换，Ghostscript也可以评估和应用(某些) PostScript 代码.

1. PostScript has a setpagedevice operator that takes a PageOffset parameter;
2. Ghostscript will process snippets of PostScript code if you pass them with -c ... on the commandline;
3. Ghostscript can evaluate and apply (some) PostScript code even for direct PDF=>PDF conversions.

现在尝试使用此命令行将所有页面图像向左移动1英寸(== 72pt):

Now try this commandline to shift all page images by 1 inch (==72pt) to the left:

gswin32c.exe ^
  -sDEVICE=pdfwrite ^
  -o c:/path/to/output/pdf-shifted-by-1-inch-to-left.pdf ^
  -dPDFSETTINGS=/prepress ^
  -c "<</PageOffset [-72 0]>> setpagedevice" ^
  -f c:/path/to/input/pdf-original.pdf

_{(为了不降低扫描图像质量而放入的-dPDFSETTINGS=/prepress ...)}

_{(The -dPDFSETTINGS=/prepress I put in in order to not loose any picture quality of the scans...)}

这篇关于如何将PDF文件中的页面图像向左或向右移动更多?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！