如何使用pyPdf沿中间拆分/裁剪pdf

Question

我有一个看起来像这样的pdf，我想裁剪掉所有文本，几乎就在页面中间。我发现这个脚本做了一些类似的事情：

def splitHorizontal():
from pyPdf import PdfFileWriter, PdfFileReader
input1 = PdfFileReader(file("in.pdf", "rb"))
output = PdfFileWriter()
numPages = input1.getNumPages()
print "document has %s pages." % numPages
for i in range(numPages):
    page = input1.getPage(i)
    print page.mediaBox.getUpperRight_x(), page.mediaBox.getUpperRight_y()
    page.trimBox.lowerLeft = (25, 25)
    page.trimBox.upperRight = (225, 225)
    page.cropBox.lowerLeft = (50, 50)
    page.cropBox.upperRight = (200, 200)
    output.addPage(page)
outputStream = file("out.pdf", "wb")
output.write(outputStream)
outputStream.close()

但是，这些裁剪尺寸会根据该特定示例进行调整。谁能告诉我如何找到正确的作物尺寸。

Answer 1

我最初从这里得到脚本 ->裁剪.pdf文件的页面。

我读了更多作者所说的话，终于意识到他说过：

生成的文档有一个 200x200 磅的裁切框，从媒体框内的 25,25 磅开始。裁剪框位于修剪框内的 25 磅。

意义

page.cropBox.upperRight = (200, 200)

必须控制最终利润，因此我将报表调整为

page.cropBox.upperLeft = (290, 792)

将裁剪镜像到另一侧并确保裁剪保留完整的垂直值

Answer 2

将每页切成两半，例如，如果来源是以小册子形式创建，然后重新组合用于进一步处理，例如。文本提取

导入所需的库

from PyPDF2 import PdfFileWriter,PdfFileReader,PdfFileMerger

拆分左侧部分

with open("docu.pdf", "rb") as in_f:
    input1 = PdfFileReader(in_f)
    output = PdfFileWriter()
    numPages = input1.getNumPages()
    for i in range(numPages):
        page = input1.getPage(i)
        page.cropBox.lowerLeft = (60, 50)
        page.cropBox.upperRight = (305, 700)
        output.addPage(page)
    with open("left.pdf", "wb") as out_f:
        output.write(out_f)

拆分右侧部分：

with open("docu.pdf", "rb") as in_f:
    input1 = PdfFileReader(in_f)
    output = PdfFileWriter()
    numPages = input1.getNumPages()
    for i in range(numPages):
        page = input1.getPage(i)
        page.cropBox.lowerLeft = (300, 50)
        page.cropBox.upperRight = (540, 700)
        output.addPage(page)
    with open("right.pdf", "wb") as out_f:
        output.write(out_f)

左右组合（两列到两页）

input1 = PdfFileReader(open("left.pdf","rb"))
input2 = PdfFileReader(open("right.pdf","rb"))
output = PdfFileWriter()
numPages = input1.getNumPages()
for i in range(numPages):
    l = input1.getPage(i)
    output.addPage(l)
    r = input2.getPage(i)
    output.addPage(r)
with open("out.pdf", "wb") as out_f:
    output.write(out_f)

Answer 3

我面临着同样的挑战，我写了这个（需要PyPDF2）：

https://gist.github.com/kintaro1981/eb6cfc6f40a7fb39744f5ae630d58fd5

# -*- coding: utf-8 -*-
"""
This script splits each pdf page in half vertically and merge them in a single PDF in order.
It asks how many pages do you want to skip to avoid splitting a book cover or a specific number of initial pages.
Usage:
python cutpdfpages.py <filename.pdf> <newfilename.pdf>
"""
import sys
import copy
from PyPDF2 import PdfWriter, PdfReader
file = str(sys.argv[1])
newfile = str(sys.argv[2])
with open(file, "rb") as pdf1:
    pdf = PdfReader(pdf1)
    output = PdfWriter()
    numpages = pdf.getNumPages()
    page2skip =  int(input('Insert how many pages do you want to skip: '))
    for i in range(page2skip, numpages):
        page = pdf.pages[i]
        pagebis = copy.copy(page)
        page.mediabox.upper_left = (page.mediabox.right / 2, page.mediabox.top,)
        output.add_page(page)
        pagebis.mediabox.upper_right = (pagebis.mediabox.right / 2, pagebis.mediabox.top,)
        output.add_page(pagebis)
    with open(newfile, "wb") as newpdf:
        output.write(newpdf)