March 2020
Intermediate to advanced
366 pages
9h 8m
English
book
OpenCV 4 with Python Blueprints - Second Edition
by Dr. Menua Gevorgyan, Michael Beyeler (USD), Arsen Mamikonyan, Michael Beyeler
Content preview from OpenCV 4 with Python Blueprints - Second Edition
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Aperture
Aperture is the diameter of the hole in the optical lens through which the light passes into the camera. The following picture shows examples of the opening set to different aperture values:
Image source—https://en.wikipedia.org/wiki/Aperture#/media/File:Lenses_with_different_apertures.jpg (CC SA 4.0)
Aperture is usually measured using an f-number. The f-number is the ratio of the system's focal length to the diameter of the opening (the entrance pupil). We won't concern ourselves with the focal length of the lens; the only thing we need to know is that only zoom lenses have variable focal lengths, thus if we don't change the magnification ...
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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.