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I can’t believe this is the first time I am writing a blog post on GPIO and the Raspberry Pi. It’s a pretty big mistake on my part. I should have written this post much earlier. You see, on average,…
Read More of Accessing RPi.GPIO and GPIO Zero with OpenCV + Python
A few weeks ago, I wrote a blog post on creating transparent overlays with OpenCV. This post was meant to be a gentle introduction to a neat little trick you can use to improve the aesthetics of your processed image(s),…
Read More of Watermarking images with OpenCV and Python
Can you believe it’s been over four years since the original Raspberry Pi model B was released? Back then the Pi Model B shipped with only 256MB of RAM and a 700MHz single core processor. Just over one year ago…
Read More of Install guide: Raspberry Pi 3 + Raspbian Jessie + OpenCV 3
A few weeks ago, I demonstrated how to order the (x, y)-coordinates of a rotated bounding box in a clockwise fashion — an extremely useful skill that is critical in many computer vision applications, including (but not limited to) perspective…
Read More of Finding extreme points in contours with OpenCV
We have now reached the final installment in our three part series on measuring the size of objects in an image and computing the distance between objects. Two weeks ago, we started this round of tutorials by learning how to…
Read More of Measuring distance between objects in an image with OpenCV
Last updated on July 8, 2021. Measuring the size of an object (or objects) in an image has been a heavily requested tutorial on the PyImageSearch blog for some time now — and it feels great to get this post…
Read More of Measuring size of objects in an image with OpenCV
Today we are going to kick-off a three part series on calculating the size of objects in images along with measuring the distances between them. These tutorials have been some of the most heavily requested lessons on the PyImageSearch blog.…
Read More of Ordering coordinates clockwise with Python and OpenCV
In today’s blog post, I interview PyImageSearch Gurus member, Tuomo Hiippala, who was recently awarded a 28000ā¬ grant (approximately $30,500 USD) to research how computer vision can be used to study visual culture, including social media images and photo archives.…
Read More of PyImageSearch Gurus member spotlight: Tuomo Hiippala
One of my favorite aspects of running the PyImageSearch blog is sharing little bitesize OpenCV tips and tricks that I’ve learned after nearly 7 years of using the OpenCV library. Today’s tip comes from my bag of experiences: constructing transparent…
Read More of Transparent overlays with OpenCV
