passing in a buffer?

[yocontra]

writing shit to the HD first is slow and error prone

[reecefenwick]

+1

[fabriciobeltran]

+1

[cburatto]

+1
This discussion on the original Tesseract-OCR group may shed a light:
how to pass image "directly" to tesseract
https://groups.google.com/forum/#!topic/tesseract-ocr/2lbpirc4Pto

[reecefenwick]

I use tesseract very heavily from Java nowadays, and I don't think this problem can be solved in this project.

You will need to use a library that provides bindings to the native tesseract API, such as https://github.com/7eggs/node-tesseract

This is what I use in Java, which provides similar bindings - https://github.com/bytedeco/javacpp-presets/tree/master/tesseract