Image Extraction

This guide will show you how to extract images from a PDF and save the output images in a zip archive.

Sample input

Images to be extracted from a PDF

Before you begin

You should get your API key from yourUniCloud account.

If this is your first time using UniPDF SDK, follow this guide to set up a local development environment.

Project setup

Clone the project repository

In your terminal, clone the examples repository. It contains the Go code we will be using for this example.

git clone

Navigate to the extract folder in the unipdf-examples directory.

cd unipdf-examples/extract

Configure environment variables

Replace the UNIDOC_LICENSE_API_KEY with your API credentials from your UniDoc account.





How it works

Lines 11-20 import the UniPDF packages and other required dependencies.

Lines 22 -29 authenticate your request with your UNIDOC_LICENSE_API_KEY with the init function.

The main function in lines 31-46 validate your input and passes it as arguments to the extractImagesToArchive function.

The extractImagesToArchive function in lines 50-123 extract images and their properties from the PDF in the input path with the ExtractPageImages function. The images are saved in the specified output path (

Run the code

Run this command to extract the images. This will also get all the required dependencies to run the program.

go run pdf_extract_images.go input.pdf  

Sample output

All images per page in the input PDF is saved to a zip archive in your current directory. Unzip the archive to view the images.

On the terminal or command line, the number of images on a page as well as their spatial information (display position and size) will be displayed.

Extracted Images

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