How to efficiently extract key information from PDF files using ChatGPT?

 


Previously: How to use ChatGPT, OCR scanning tools, and annotation tools in six steps to achieve efficient reading of academic papers?In this article, it was mentioned that for efficient paper reading, ChatGPT can be used. Now I have found that many friends want to quickly extract or understand a certain part or even the core content of the entire PDF document in their hands. Reading word for word is too time-consuming. We can also use ChatGPT to achieve this, and the time saved can be used to complete other tasks! Let's take a look together at how to get ChatGPT to help us "work".

Outline

  • Preparation work
  • Convert PDF scans to a processable format
    • pdftopdf.ai website operation steps
  • ChatGPT: Efficient Online Summary of PDFs
  • Summary

Preparation work

Firstly, it is necessary to ensure that you have access to ChatGPT. An introduction to ChatGPT and how to use it can be read in advance:How to use ChatGPT? Introduction and teaching of ChatGPT is the easiest to understand. Friends in Chinese Mainland can directly refer to the way in this video. The tutorial is simple and easy to understand without nonsense. It should be noted that you need to climb over the wall. Additionally, version 4.0 requires a fee, while version 3.5 is free.
After ChatGPT can be used normally, if the PDF in your hand is already in text format, you can directly communicate with ChatGPT and let it "work" for you. If your PDF file is a scanned version, you need to find another PDF to text tool. There are many options for such tools, including online services and desktop applications. If you, like me, don't like to install software on your computer, just go to the online OCR website. Finally, prepare the PDF document that needs to be analyzed, preferably with clear and readable content, so that subsequent OCR scanning and recognition tools can smoothly extract text content.

Convert PDF scans to a processable format

Due to the limited ability of ChatGPT to directly process PDFs, we need to first convert the scanned PDF into text format through optical character recognition (OCR) technology, which is particularly important for PDFs containing charts or images. After completing the conversion, as a precaution, please make sure to check the accuracy of the text and manually correct any recognition errors.
You can try PDF to PDF as a scanning tool. This is my commonly used online text extraction website, which focuses on simplicity and specialization, and is committed to making OCR the most professional feature. It is very easy to operate, and there is also a free trial function for new users. It was because it had the opportunity to try for free that I had the mentality of trying it out without losing anything. That's why today I am here to recommend it to everyone. Let's take a look!

pdftopdf.ai website operation steps

Step 1: Enter the pdftopdf.ai website
Firstly, enter pdftopdf.ai into the browser, which is supported on both mobile and PC devices. Friends who do not have a computer can directly operate this step in their mobile browser.

Step 2: Click the upload file button
After entering the homepage, you will see the "Upload File" button. Simply click on it to upload the PDF scan that requires OCR to extract text to the website.

Step 3: Download
Click "Preview" to first check if you are satisfied with the extracted effect. If you are satisfied, you can click the "Expand Processing File" button to make payment and download (new users can directly download for free)

ChatGPT: Efficient Online Summary of PDFs

After extracting the text, as a precaution, you can check it yourself. I have processed many documents using the PDF to PDF tool and have not found any extraction errors so far. Moreover, the formatting is consistent with the original file, which is particularly time-saving and labor-saving. After the inspection is completed, we can use ChatGPT. Let's take a look at how to operate it.
Enter text into ChatGPT
Considering that ChatGPT has a certain limit on the length of a single input, if your PDF document is long, you need to divide the text into multiple parts and input them separately. This process can be automated using API interfaces, or manually copied and pasted into the ChatGPT interface. Meanwhile, providing sufficient contextual information helps ChatGPT better understand and process text.
Guide ChatGPT to extract content
To achieve the desired output results, you can clearly inform ChatGPT of the type of information you want to extract, such as keywords, abstracts, or specific data points. Writing precise instruction prompts (Prompts) is crucial as it can guide ChatGPT to work according to your intentions.
For example, if what we need it to do now is extract key information from PDF documents, or if we need ChatGPT to help us summarize the main idea, we can write instructions like "Write a concise and comprehensive summary [insert text here]" or "Summarize the text above" and send them together.
Evaluation and iteration
After the first attempt, you should carefully check whether the results given by ChatGPT meet expectations. If not satisfied, ChatGPT can improve its output through a feedback mechanism. This process may require several cycles to achieve optimal results, so patience and repeated experimentation are necessary. I call it the process of 'training AI'.
Organize and apply extracted content
Once satisfactory extraction results are obtained, the next step is to organize this information into a form that is easy to understand and apply. It may be the basis for creating a concise report or developing a specific action plan. Remember to properly store processed information for future reference and use.
Precautions and Limitations
Despite the powerful functionality of ChatGPT, there are also some challenges encountered in practical operation. For example, terminology in certain professional fields may not be easily interpreted correctly; extra caution is required when dealing with personal privacy or sensitive information.

Summary

Using ChatGPT to extract key content from PDF files not only improves efficiency, but also enhances our ability to handle complex information. With the continuous development of technology, we look forward to more innovative methods emerging to make this task simpler and more accurate. Meanwhile, continuous learning and technological exploration remain the key to mastering the latest tools and techniques.
Read more
How to use ChatGPT, OCR scanning tools, and annotation tools in six steps to achieve efficient reading of academic papers?
Adobe Acrobat alternative: PDF to PDF efficiently completes academic writing, supports OCR recognition, PDF editing

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