May 2019
Intermediate to advanced
494 pages
14h 6m
English
book
OpenCV 4 Computer Vision Application Programming Cookbook - Fourth Edition
by David Millán Escrivá, Robert Laganiere
Content preview from OpenCV 4 Computer Vision Application Programming Cookbook - Fourth Edition
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How to do it...
The steps for this recipe are as follows:
- Suppose we have identified an object of interest—here, a baboon's face—as shown in the following screenshot (refer to this book's graphics PDF to view this image in color):
- This time, we will describe this object by using the hue channel of the HSV color space. This means that we need to convert the image into an HSV one and then extract the hue channel and compute the 1D hue histogram of the defined ROI. Refer to the following code:
// Read reference image cv::Mat image= cv::imread("baboon1.jpg"); // Baboon's face ROI cv::Mat imageROI= image(cv::Rect(110,260,35,40)); // Get the ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.