Introduction
This article explains how to copy an image from a PDF document using the "Copy Image" function, imitating the result obtained when using Evince, a popular open-source PDF viewer.
Prerequisites
To follow this tutorial, you need:
- A PDF document with an image to be copied.
- A text editor or an Integrated Development Environment (IDE) for programming.
- Basic knowledge of programming in your preferred language.
Copying Image using "Copy Image" Function in Evince
Evince is a free and open-source PDF viewer for the GNOME desktop environment. One of its useful features is the ability to copy images directly from a PDF document using the "Copy Image" function. Here's how to do it:
- Open the PDF document in Evince.
- Locate the image you want to copy.
- Right-click on the image and select "Copy Image" from the context menu.
Imitating Evince's Resulting Image using Code
In this section, we will explore how to write a simple program in Python to imitate the image copying functionality provided by Evince.
Installation
To use the Python code, you need to install the following libraries:
Code
import os
import sys
from PIL import Image
from PyPDF2 import PdfFileReader, PdfFileWriter
def copy_image_from_pdf(input_file, image_index, output_file):
"""
Copies the image at the given index from the input PDF file and saves it as a new image file.
"""
pdf = PdfFileReader(input_file)
page = pdf.getPage(image_index)
image = page.extractTextAndImages()
img = image[0]
img.save("temp.png")
output = PdfFileWriter()
pdf = PdfFileReader(input_file)
output.addPage(pdf.getPage(image_index))
with open("temp.png", "rb") as temp_file:
output.addImage(Image.open(temp_file), page.mediaBox)
with open(output_file, "wb") as output_stream:
output.write(output_stream)
os.remove("temp.png")
if name == "main":
if len(sys.argv) != 5:
print("Usage: python copy_image.py <input_pdf> <image_index> <output_image>")
sys.exit(1)
input_file = sys.argv[1]
image_index = int(sys.argv[2])
output_file = sys.argv[4]
copy_image_from_pdf(input_file, image_index, output_file)
Usage
To use the Python code, run the following command:
python copy_image.py input.pdf 1 output.png
Replace "input.pdf" with the name of your input PDF file, "1" with the index of the image to be copied, and "output.png" with the desired output image filename.
Summary and References
In this article, we learned how to copy an image from a PDF document using the "Copy Image" function in Evince and how to write a simple Python program to imitate this functionality. For more information, you can refer to the following resources: