Adrian Rosebrock

If you haven’t noticed, the term “feature vector” is used quite often in this blog. And while we’ve seen it a lot, I wanted to dedicate an entire post to defining what exactly a feature vector is. What is an…

We are now at the final step of building an image search engine — accepting a query image and performing an actual search. Let’s take a second to review how we got here: Step 1: Defining Your Image Descriptor. Before we…

I’ve been throwing around the idea of writing a book for the past few months, but I wasn’t sure on what the exact focus was going to be. I’ve given it a ton of thought, worked out the specifics, and…

First, let’s have a quick review. Two weeks ago we explored the first step of building an image search engine: Defining Your Image Descriptor. We explored three aspects of an image that can easily be described: color, texture, and shape.…

Last Wednesday’s blog post reviewed the first step of building an image search engine: Defining Your Image Descriptor. We then examined the three aspects of an image that can be easily described: Color: Image descriptors that characterize the color of…

On Monday, I showed you how to build an awesome Lord of the Rings image search engine, from start to finish. It was a lot of fun and we learned a lot. We made use of OpenCV image descriptors. More…

One Ring to rule them all, One ring to find them; One ring to bring them all and in the darkness bind them. The image search engine we are about to build is going to be so awesome, it could…

It’s…it’s a histogram. – Dr. Grant Okay. So maybe that isn’t the exact quote. But I think Dr. Grant would have been equally thrilled had he known the power of color histograms. And more importantly, when the power goes out,…

Are you ready to start building your first image search engine? Not so fast! Let’s first go over some basic image processing and manipulations that will come in handy along your image search engine journey. If you are already an…