Adrian Rosebrock

Still using the original, plain ole’ implementation of SIFT by David Lowe? Well, according to Arandjelovic and Zisserman in their 2012 paper, Three things everyone should know to improve object retrieval, you’re selling yourself (and your accuracy) short by using…

Today I’ve got a little trick for you, straight out of the PyImageSearch vault. This trick is really awesome — and in many cases, it completely alleviates the need to tune the parameters to your Canny edge detectors. But before…

Over the past year the PyImageSearch blog has had a lot of popular blog posts. Using k-means clustering to find the dominant colors in an image was (and still is) hugely popular. One of my personal favorites, building a kick-ass…

So in last week’s blog post we discovered how to construct an image pyramid. And in today’s article, we are going to extend that example and introduce the concept of a sliding window. Sliding windows play an integral role in…

It’s too damn cold up in Connecticut — so cold that I had to throw in the towel and escape for a bit. Last week I took a weekend trip down to Orlando, FL just to escape. And while the…

Being raised on the east coast of the United States I guess I should be used to the snow by now — but I’m not. As a kid, I loved the snow. I loved sledding, snowboarding, and snowball fights. But…

Today’s blog post comes directly from my own personal repository of utility functions. Over the past month I’ve gotten a handful of PyImageSearch readers emailing in and asking how to download an image from a URL and then convert it…

My Raspberry Pi 2 just arrived in the mail yesterday, and man is this berry sweet. This tiny little PC packs a real punch with a 900mhz quadcore processor and 1gb of RAM. To give some perspective, the Raspberry Pi…

I have issues — I can’t stop thinking about object detection. You see, last night I was watching The Walking Dead and instead of enjoying the zombie brutality, the forced cannibalism, or the enthralling storyline, all I wanted to do…