Tag Archives | color

Computing image “colorfulness” with OpenCV and Python

Today’s blog post is inspired by a question I received from a PyImageSearch reader on Twitter, @makingyouthink. Paraphrasing the tweets myself and @makingyouthink exchanged, the question was: Have you ever seen a Python implementation of Measuring colourfulness in natural images (Hasler and Süsstrunk, 2003)? I would like to use it as an image/produce search engine. […]

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Charizard Explains How To Describe and Quantify an Image Using Feature Vectors

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 Image Feature Vector? Image Feature Vector: An abstraction of an image used to characterize and […]

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Building an Image Search Engine: Indexing Your Dataset (Step 2 of 4)

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 an image seek to model the distribution of the pixel intensities in each channel of the […]

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Clever Girl: A Guide to Utilizing Color Histograms for Computer Vision and Image Search Engines

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, the histograms don’t eat the tourists. So, what exactly is a histogram? A histogram represents the distribution […]

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