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OpenCV Tutorials
Tutorials

Rotate images (correctly) with OpenCV and Python

January 2, 2017

Let me tell you an embarrassing story of how I wasted three weeks of research time during graduate school six years ago. It was the end of my second semester of coursework. I had taken all of my exams early…

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Image Processing
Tutorials

How to Build a Kick-Ass Mobile Document Scanner in Just 5 Minutes

September 1, 2014

Building a document scanner with OpenCV can be accomplished in just three simple steps: Step 1: Detect edges. Step 2: Use the edges in the image to find the contour (outline) representing the piece of paper being scanned. Step 3:…

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Image Processing
Tutorials

4 Point OpenCV getPerspective Transform Example

August 25, 2014

Last updated on July 4, 2021. 4:18am. Alarm blaring. Still dark outside. The bed is warm. And the floor will feel so cold on my bare feet. But I got out of bed. I braved the morning, and I took…

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Building a Pokedex
Examples of Image Search Engines
Tutorials

Building a Pokedex in Python: OpenCV and Perspective Warping (Step 5 of 6)

May 5, 2014

We’re getting closer to finishing up our real-life Pokedex! In my previous blog post, I showed you how to find a Game Boy screen in an image using Python and OpenCV. This post will show you how to apply warping…

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You can learn Computer Vision, Deep Learning, and OpenCV.

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