Tutorials

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…

Awhile back I was going through /r/computervision when I stumbled across a question asking how to remove contours from an image using OpenCV. Intrigued, I posted a reply. The basic algorithm for removing contours from an image goes something like…