GPT-4.5, like its predecessor GPT-4, is a large-scale, multimodal model capable of processing both text and image inputs to produce text outputs[5]. However, when it comes to handling images within PDFs, there are specific limitations and methods to consider:
1. Direct Image Analysis in PDFs: GPT-4.5 itself does not directly analyze images embedded within PDFs. Instead, it can process images if they are extracted from the PDF and presented separately. This means that if you want GPT-4.5 to analyze images in a PDF, you need to first extract those images using tools like `pdf2image` or similar libraries[4].
2. Image Extraction and Conversion: To analyze images in PDFs, you would typically convert each page of the PDF into an image format (e.g., PNG or JPEG) using libraries such as `pdf2image`. Once the images are extracted, you can use GPT-4.5's vision capabilities to analyze them. This involves uploading the images to the model, either as URLs or in Base64 encoded format[3][4].
3. Vision Capabilities: GPT-4.5's vision capabilities allow it to understand and describe the content of images, including identifying objects and answering general questions about what is present in the images. However, it may not be able to provide detailed spatial information about objects within the images[3].
4. Limitations: While GPT-4.5 can process images, it has limitations in handling complex or low-resolution images. If an image is of poor quality or contains unreadable text, the model may struggle to extract meaningful information from it[2][6].
5. Advanced Analysis Techniques: For more sophisticated analysis, such as extracting text from images using Optical Character Recognition (OCR) or analyzing charts and diagrams, you might need to combine GPT-4.5 with other tools or libraries like Tesseract for OCR and image processing techniques for handling complex visual content[2].
In summary, GPT-4.5 can effectively analyze images if they are extracted from PDFs and presented separately, leveraging its vision capabilities to understand and describe their content. However, direct analysis of images embedded within PDFs without extraction is not supported.
Citations:
[1] https://www.reddit.com/r/OpenAI/comments/1c0pg1x/gpt4_and_pdf_analysis/
[2] https://www.youtube.com/watch?v=bWYzU68c77k
[3] https://platform.openai.com/docs/guides/vision
[4] https://www.groff.dev/blog/ingesting-pdfs-with-gpt-vision
[5] https://arxiv.org/abs/2303.08774
[6] https://community.openai.com/t/is-it-possible-to-analyze-images-contained-in-pdf-files/533994
[7] https://cdn.openai.com/gpt-4-5-system-card.pdf
[8] https://community.openai.com/t/what-are-the-limitations-of-gpt-4-in-analyzing-pdf-text/534760