Chat with Scanned Documents
FreeA demo chatting with documents scanned with Dynamic Web TWAIN.
FreeFree tier
Inputs: imageOutputs: text
About Chat with Scanned Documents
A demo of using Tesseract.js to extract text of documents scanned with Dynamic Web TWAIN and use LangChain to chat with them. This open-source project provides a web interface for scanning documents, performing OCR, and asking questions about the extracted content. It includes an online demo and can be run locally with npm commands.
Key Features
Text extraction from scanned documents using Tesseract.js OCR
Document scanning integration via Dynamic Web TWAIN
Conversational Q&A with extracted text using LangChain
Online demo available for quick testing
MIT licensed open-source code
Easy local setup with npm install and npm start
Pros & Cons
Pros
- Free and open-source (MIT license)
- Combines OCR with LLM for natural language interaction with scanned text
- Easy to set up and run locally with simple npm commands
- Includes an online demo for immediate testing
Cons
- Requires Dynamic Web TWAIN SDK which may expire and need a license
- Demo quality, not production-ready
- Limited to documents scanned via Dynamic Web TWAIN (not general document upload)
- OCR accuracy depends on Tesseract.js and document quality
Best For
Digitizing and querying paper documents or formsExtracting information from scanned contracts, invoices, or receiptsAcademic research: asking questions about scanned articlesBuilding a Q&A system for archived document collections
FAQ
How do I install and run the demo?
Run `npm install` to install dependencies, then `npm start` to start the development server. Use `npm run build` to create a production build.
Is a license required?
The Dynamic Web TWAIN SDK used for scanning may expire; you need to apply for a free license from the Dynamsoft website if it does.
What technologies are used?
It uses Tesseract.js for OCR, LangChain for chat, and Dynamic Web TWAIN for scanning documents.