将图像置于PDF之上

Question

如何在特定坐标位置将图像放置在现有PDF文件上。pdf表示一张有一页的图纸。图像将被缩放。我正在查看ReportLab，但找不到答案。谢谢。

Answer 1

http://pybrary.net/pyPdf/

from pyPdf import PdfFileWriter, PdfFileReader

output = PdfFileWriter()
input1 = PdfFileReader(file("document1.pdf", "rb"))
watermark = PdfFileReader(file("watermark.pdf", "rb"))

input1.mergePage(watermark.getPage(0))

# finally, write "output" to document-output.pdf
outputStream = file("document-output.pdf", "wb")
output.write(input1)
outputStream.close()

我认为它类似于watermark，更好的想法请参阅手册

Answer 2

已经5年了，我认为这些答案需要一些TLC。这是一个完整的解决方案。

以下代码使用Python 2.7进行了测试

安装依赖项

pip install reportlab 
pip install pypdf2

施展魔法

from reportlab.pdfgen import canvas
from PyPDF2 import PdfFileWriter, PdfFileReader

# Create the watermark from an image
c = canvas.Canvas('watermark.pdf')

# Draw the image at x, y. I positioned the x,y to be where i like here
c.drawImage('test.png', 15, 720)

# Add some custom text for good measure
c.drawString(15, 720,"Hello World")
c.save()

# Get the watermark file you just created
watermark = PdfFileReader(open("watermark.pdf", "rb"))

# Get our files ready
output_file = PdfFileWriter()
input_file = PdfFileReader(open("test2.pdf", "rb"))

# Number of pages in input document
page_count = input_file.getNumPages()

# Go through all the input file pages to add a watermark to them
for page_number in range(page_count):
    print "Watermarking page {} of {}".format(page_number, page_count)
    # merge the watermark with the page
    input_page = input_file.getPage(page_number)
    input_page.mergePage(watermark.getPage(0))
    # add page from input file to output document
    output_file.addPage(input_page)

# finally, write "output" to document-output.pdf
with open("document-output.pdf", "wb") as outputStream:
    output_file.write(outputStream)

参考文献：

pypdf的新家：http://mstamy2.github.io/PyPDF2/

报告实验室文档：http://www.reportlab.com/apis/reportlab/2.4/pdfgen.html

Reportlab完整用户指南：https://www.reportlab.com/docs/reportlab-userguide.pdf

Answer 3

我组合了ReportLab (http://www.reportlab.com/software/opensource/rl-toolkit/download/)和pyPDF (http://pybrary.net/pyPdf/)来直接插入图像，而不必预先生成PDF：

from pyPdf import PdfFileWriter, PdfFileReader
from reportlab.pdfgen import canvas
from StringIO import StringIO


# Using ReportLab to insert image into PDF
imgTemp = StringIO()
imgDoc = canvas.Canvas(imgTemp)

# Draw image on Canvas and save PDF in buffer
imgPath = "path/to/img.png"
imgDoc.drawImage(imgPath, 399, 760, 160, 160)    ## at (399,760) with size 160x160
imgDoc.save()

# Use PyPDF to merge the image-PDF into the template
page = PdfFileReader(file("document.pdf","rb")).getPage(0)
overlay = PdfFileReader(StringIO(imgTemp.getvalue())).getPage(0)
page.mergePage(overlay)

#Save the result
output = PdfFileWriter()
output.addPage(page)
output.write(file("output.pdf","w"))