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Image Descriptors
So what type of shape descriptors does OpenCV provide? The most notable are Hu Moments which are can be used to describe, characterize, and quantify the shape of an object in an image. Hu Moments are normally extracted from the…
Read More of OpenCV Shape Descriptor: Hu Moments Example
So you’ve extracted color histograms from a set of images… But how are you going to compare them for similarity? You’ll need a distance function to handle that. But which one? How you choose? And how do you compare histograms…
Read More of How-To: 3 Ways to Compare Histograms using OpenCV and Python
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…
Read More of Charizard Explains How To Describe and Quantify an Image Using Feature Vectors
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…
Read More of Hobbits and Histograms – A How-To Guide to Building Your First Image Search Engine in Python
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,…
Read More of Clever Girl: A Guide to Utilizing Color Histograms for Computer Vision and Image Search Engines
