Table of Contents Introduction Open Source OCR Tools Tesseract OCR Technology — How it works Installing Tesseract Running Tesseract with CLI OCR with Pytesseract and OpenCV Preprocessing for Tesseract Getting boxes around text Text template matching Page segmentation modes Detect orientation and script Detect only digits Whitelisting characters Blacklisting characters Detect in multiple…

A few days ago, I stumbled upon a question on Reddit. The commenter wanted to know if it was possible to extract text from a rough location on an image, so basically a screenshot or an image of a standard-form document. …

In this post, we’ll be using OpenCV to apply OCR on the selected region of an image. By the end of this blog, you’ll be able to apply automated orientation correction on the input image, select the region of interest and apply OCR to the selected region. This blog is…

Applying computer vision techniques to sharpen accuracy — Previously, on How to get started with Tesseract, I gave you a practical quick-start tutorial on Tesseract using Python. It is a pretty simple overview, but it should help you get started with Tesseract and clear some hurdles I faced when I was in your shoes. …

Setting up your open-source OCR stack from scratch — It’s far from a secret that Tesseract is not an all-in-one OCR tool that recognizes all sorts of texts and drawings. In fact, this couldn’t be further from the truth. If this was a secret, I’ve already spoiled it, and it’s already too late to go back anyway. …