March 2019
Intermediate to advanced
538 pages
13h 38m
English
book
Building Computer Vision Projects with OpenCV 4 and C++
by David Millan Escriva, Prateek Joshi, Vinicius G. Mendonca, Roy Shilkrot
Content preview from Building Computer Vision Projects with OpenCV 4 and C++
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Drawing a histogram
A histogram is a statistical graphic representation of variable distribution that allows us to understand the density estimation and probability distribution of data. A histogram is created by dividing the entire range of variable values into a small range of values, and then counting how many values fall into each interval.
If we apply this histogram concept to an image, it seems to be difficult to understand but, in fact, it is very simple. In a gray image, our variable values' ranges are each possible gray value (from 0 to 255), and the density is the number of pixels of the image that have this value. This means that we have to count the number of pixels of the image that have a value of 0, the number of pixels with ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.